elementish-synth v1.4.1

Release Notes

v1.4.1

Performance fix release: restores the NEON modal resonator and cuts reverb guard overhead.

Bug Fixes

• NEON modal resonator re-enabled: v1.4.0 shipped without the ELEMENTISH_USE_NEON_RESONATOR define, which silently reverted the resonator to the scalar SVF path and lost the NEON speedup introduced in v1.1.0 (~40% on the modal resonator). Release builds now define the opt-in macro again
• Reverb CPU cost reduced: the v1.4 per-sample NaN guards ran ~34 bit-pattern checks per sample. Guards now run only where values enter the tank (input, comb/allpass writes, wet output) — the guarded-write invariant makes read checks redundant — and use a single exponent-field compare (NaN/Inf or |x| >= 2^19) instead of the three-condition test

Performance

Measured on the QEMU ARM harness (64-frame buffers, 10 s parameter storm, seed 1234):

Build	CPU Usage	Real-Time Factor
v1.3.1	9.02%	11.08x
v1.4.0	16.18%	6.18x
v1.4.1	9.11%	10.98x

Output metrics are unchanged by the guard rewrite (peak/rms/DC identical). Note: QEMU does not model Cortex-A7 NEON throughput, so the NEON gain is understated in the harness.

Regression Tests

• Full desktop suite (9 phases) passes with a native ARM64 NEON build
• --bow-stability-test and --preset-retrigger-test pass with the NEON resonator enabled
• QEMU ARM symbol/ABI audit and WAV validation pass

---

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.elementish-synth.md for full documentation.

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Built from commit: 9a9037ec1e64f3998219e179a41c52020a876040

elementish-synth v1.4.0

Release Notes

Elementish Synth - Release Notes

v1.4.0

Review-fix release: note transitions, tuning, and string pickup position.

Bug Fixes

• Tuning is applied to directly played notes: COARSE, FINE and pitch bend were only applied to sequencer-generated notes; NoteOn, GateOn, held-note retuning and the preset retrigger now use the fully tuned pitch (ClampedFullTunedNote), so COARSE/FINE/pitch bend work on every note path
• All-notes-off / panic cleanup: AllNoteOff() now clears the held-note state, so a subsequent preset load or retune cannot re-trigger a note after the host requested silence
• STRING/MSTRING POSITION control works: the pickup position comb was a no-op (the read position was invariant to the parameter); the position tap is now actually summed into the delay line output, so POSITION changes the string timbre as documented
• Full-mode COARSE retunes a held note (lightweight mode already did); turning COARSE while a note is held now re-pitches it immediately
• Preset switch no longer goes silent with the sequencer: if a note is held while the sequencer is enabled and the new preset disables it (SEQ OFF), the retrigger falls through to a direct note instead of feeding the disabled sequencer
• Preset load / note transition stability: voice runtime state is reset and the held note retriggered on preset switch (sound engine no longer stops mid-note; note-transition distortion reduced)
• Sequencer state leaks: pending notes are dropped on note-off, all-notes-off, panic and preset change; interval-scale quantization no longer wraps to the wrong octave
• Reverb diagnostics: debug_last_wet_ is now tracked on host builds so reverb instability is visible in the render debug log

Regression Tests

• --preset-retrigger-test: 56 preset transitions (voice must keep sounding and stay finite after a preset switch while a note is held)
• --bow-stability-test: repeated bow note transitions stay finite and audible
• --gate-test: drumlogue pattern-sequencer simulation with correct COARSE transpose mapping
• Test CLI fix: --cutoff/--resonance consume their value argument in lightweight builds (previously the value was mis-parsed as the output file)

Presets Editor

• Native presets-editor builds now apply the unit's config.mk macros, so the editor loads the same lightweight build that ships on hardware (with the Marbles sequencer) instead of the full filter/LFO build
• drupiter-synth can now be built natively on Apple Silicon with its release macros (NEON_DCO and friends)

---

v1.3.1

Preset-transition fix.

Bug Fixes

• Preset load no longer kills the playing voice: LoadPreset() now resets the voice runtime state (envelope segments, exciter/sample-player state) and retriggers the currently held note with the new preset, so a preset switch while a note is held continues to sound instead of dying out after the stale envelope completes
• Blown preset (4) is audible again: its SPACE value was below the blow tube's oscillation threshold, leaving it near-silent; raised to 80
• Quartic attack table ends at 1.0 (the table was truncated at ~0.43, so attack never reached full level)
• Sequencer preset changes now stop active subdivisions and drop pending notes (voice boundary), matching LoadPreset

Regression Test

• --preset-retrigger-test: holds a note into its decay tail, loads every other factory preset, and verifies the voice keeps sounding with finite output (all 56 transitions)

---

v1.3.0

Review-fix release.

Bug Fixes

• Sequencer note leak: pending sequencer notes are dropped on note-off, all-notes-off, panic and preset change, so no note can ring out after the host requested silence
• MIDI tuning clamp: tuned notes are clamped to [0, 127] before the uint8_t conversion (out-of-range float casts are undefined behavior)
• Attack envelope: the quartic lookup table was non-monotonic and overshot 1.0; replaced with a correct, monotonic t⁴ curve
• Pitch bend: now bends the currently held note, not just the next one
• Interval-scale quantization: OCT/5TH/4TH/TRI no longer wrap to the wrong octave (e.g. +11 now maps to +12 instead of +0)
• STRING/MSTRING resonator: GEOMETRY now maps to dispersion (STRING) and the Elements chord table (MSTRING); POSITION now controls the string pickup for both models
• BLOW exciter: rewritten as an Elements-style granular sample-player source (noise wavetable scan) instead of plain filtered noise; FLOW sets restart density
• SPACE metaparameter: now drives raw exciter bleed, stereo spread, and a reverb tail (reverb amount and time follow the original Elements mapping)
• FINE tuning: re-exposed on page 6; DEJA VU moved to page 4
• Test CLI: lightweight parameter IDs fixed (--model no longer corrupted by --cutoff/--resonance); added --fine

Page 6 Parameter Changes (Lightweight Mode)

Parameter	Description
COARSE	Coarse tuning (±24 semitones)
FINE	Fine tuning (±100 cents)
SEQ	Sequencer preset (0-15)
SPREAD	Note range (0-127)

DEJA VU moved to page 4 (slot after VOLUME).

---

v1.2.0 (December 2025)

Generative sequencer release with Marbles-inspired note generation.

New Features

• Marbles-Inspired Generative Sequencer (Lightweight mode only)

  • Triggered by drumlogue pattern sequencer or MIDI notes
  • Generates tempo-synced melodic subdivisions
  • 16 presets combining subdivision rate and scale quantization

• 16 Sequencer Presets

  • OFF: Normal note playback
  • SLOW/MED/FAST: 1/2/4 notes per beat (chromatic)
  • X2/X4: 8/16 notes per beat (extreme subdivisions)
  • MAJ/MIN/PENT/CHROM: Scale-quantized 16th notes
  • OCT/5TH/4TH: Interval-based 8th notes
  • TRI: Triplet feel with triad quantization
  • 7TH: 16th notes quantized to 7th chord tones
  • RAND: Random scale selection per trigger

• Déjà Vu Loop Buffer

  • 8-step pattern memory
  • DEJA VU parameter: 0 = fully random, 127 = locked loop
  • Creates repeating melodic patterns from randomness

• SPREAD Control

  • Adjusts note range from unison (0) to ±24 semitones (127)
  • Works with scale quantization for musical results

Technical Improvements

• Skip-ahead optimization in Process() - no per-sample iteration
• Note queue (8-deep circular buffer) prevents note loss at high subdivisions
• Gate triggering - works with drumlogue's built-in pattern sequencer
• Bounds checking on preset selection for safety

Page 6 Parameter Changes (Lightweight Mode)

Parameter	Description
COARSE	Base note for sequencer (±24 semitones from middle C)
SEQ	Sequencer preset (0-15)
SPREAD	Note range (0-127)
DEJA VU	Pattern looping (0-127)

Build Info

• Binary size: ~124KB
• All 16 sequencer presets validated
• Gate and MIDI triggering tested

---

v1.1.0 (December 2025)

Performance optimization release with ARM NEON SIMD support.

New Features

• NEON SIMD Optimizations - Significant performance improvements on ARM Cortex-A7
  • Modal resonator: ~40% speedup (4-way parallel SVF processing)
  • CosineOscillator batch compute: ~2.4x faster amplitude calculation
  • Stereo soft clamp: 2x faster output processing
  • FastTanh saturation: ~20% speedup (4 values simultaneously)

Technical Improvements

• Structure-of-Arrays (SoA) layout for mode coefficients eliminates scatter-gather overhead in NEON loop
• NaN protection and stability checks in NEON mode processing loop
• Optimized CosineOscillator::Next4() batch method for modal amplitude modulation
• Vectorized stereo output processing using float32x2_t

Internal Changes

• Moved NEON DSP utilities to shared common/neon_dsp.h library
• Added SyncSoAFromModes()/SyncSoAToModes() for efficient coefficient sync
• Coefficient sync only happens when parameters change (not per-sample)

Build Info

• Binary size: ~124KB (minimal increase for NEON paths)
• All 8 presets validated
• All 3 resonator modes (MODAL/STRING/MSTRING) tested

---

v1.0.0 (December 2025)

Initial release of Elementish Synth for Korg drumlogue.

Features

• Modal Synthesis Engine - Port of Mutable Instruments Elements
• Three Excitation Types:
  • BOW: Continuous friction/bowing with adjustable timbre
  • BLOW: Granular noise/breath with flow control
  • STRIKE: Percussive impacts (5 modes: SAMPLE, GRANULAR, NOISE, PLECTRUM, PARTICLE)
• Three Resonator Models:
  • MODAL: Classic 8-partial modal resonator
  • STRING: Karplus-Strong string synthesis
  • MSTRING: 5 sympathetic strings for rich harmonic content
• 12 Mallet Types: SOFT/MED/HARD/PLEC/STIK/BOW × DK(dark)/BR(bright)
• 8 Factory Presets: Init, Bowed Str, Bell, Pluck, Blown, Marimba, String, Drone
• Full MIDI Support: Velocity-sensitive dynamics, pitch bend (+/- 2 semitones)
• 24 Parameters across 6 pages
• Stereo Width Control via SPACE parameter

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo output
• Optimized for Cortex-A7 with NEON disabled in initial release

Credits

• DSP Algorithms based on Mutable Instruments Elements by Émilie Gillet
• Original License: MIT License

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.elementish-synth.md for full documentation.

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Built from commit: c46d9a058dfb96b97e2259f5cd1aab826cac7d3d

druteus v0.1.0

Release Notes

Druteus - Release Notes

v0.1.0 - 2026-08-03

Initial release of Druteus, an E-mu Proteus/1 SoundFont synthesizer for Korg drumlogue.

Features

• TinySoundFont SF2 playback with support for files in the drumlogue Programs/ folder
• 442 Proteus/1 factory patches across six original ROM volumes
• Dual-layer voice architecture with per-layer tuning, volume, pan, and patch sends
• Per-patch AHDSR envelopes and LFO modulation
• Velocity crossfade and keyboard split modes
• User LFO with five waveforms and three destinations
• State-variable filter with LP12, LP24, HP12, and BP12 modes
• Chorus and Griesinger reverb effects
• Tempo-synchronized trance gate with 1-32 step patterns
• 1-16 voice polyphony with oldest-note voice stealing
• MIDI velocity, pitch bend, and channel pressure support

Improvements

• ARM NEON optimizations for DSP, gain, and stereo interleave processing
• Float-precision TSF lowpass processing for improved drumlogue performance
• Chunked asynchronous SF2 loading in 128 KB blocks to avoid long UI stalls

Bug Fixes

• Disabled production performance-monitor register access that could hang the unit
• Fixed SF2 loading behavior by moving file reads out of the audio render path

Known Issues

• The Proteus/1 SoundFont is not bundled with the unit and must be downloaded separately.
• Audio is silent while a SoundFont is loading at startup or after selecting a new file.

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.druteus.md for full documentation.

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Built from commit: a2d849164421ef411caf2455aeeb30d47bab0507

drupiter-synth v1.2.0

Release Notes

Release Notes - Drupiter Synth

v1.2.0 - 2026-02-07

🎛️ MIDI Expression & Bug Fixes

Third release with enhanced MIDI expressiveness and comprehensive stability improvements.

New Features

MIDI Expressiveness:

• Velocity Sensitivity: Notes respond to MIDI velocity for dynamic control of filter cutoff (50% modulation depth)
• Pitch Bend: ±2 semitone pitch bend with smooth per-buffer smoothing (~200ms response)
• Channel Pressure: Real-time pressure modulation of VCF cutoff frequency (+1 octave depth)
• Aftertouch: Per-note aftertouch support for expressive, dynamic control
• Per-Buffer Smoothing: All MIDI modulations use exponential smoothing to prevent clicks and zipper noise

Enhanced Common Library:

• Extended midi_helper.h with reusable pressure/aftertouch conversion utilities
• Standardized MIDI parameter scaling (0-127 → 0.0-1.0 normalized range)
• New catchable_value.h utility: Generic knob catch mechanism (±3 unit threshold)
• Reusable by all drumlogue units

Improvements

• Extracted mono/poly/unison renderers for clearer DSP flow and easier maintenance
• Added shared voice allocator core in drumlogue/common for consistent note handling
• Key-trigger LFO support for tighter Jupiter-8 style modulation
• Q31 wavetable interpolation path for DCO tables
• JP-8 envelope time calibration (attack, decay, release ranges)
• QEMU/perf monitoring fallback timing and stereo widener allocation safety

Technical Improvements

DSP Stability:

• Eliminated dynamic memory allocation in voice allocator (fixes undefined symbols)
• Fixed Q31 fixed-point interpolation with proper PolyBLEP anti-aliasing
• Improved voice allocation in mono/unison modes (last-note priority)
• Fixed mod hub UI page flickering on drumlogue display

Build System:

• Automatic symbol verification in build.sh
• Preserved build artifacts from container for debugging
• Comprehensive build artifact analysis (object files, memory maps, symbol tables)

Testing & Debugging:

• 5 new MIDI tests in desktop test harness (velocity, pitch bend, pressure, aftertouch, smoothing)
• 5 new catchable value tests (basic follow, catch/release, threshold, bipolar, float variant)
• All 13 tests passing (3 voice allocation + 5 MIDI expression + 5 catchable value)
• Complete debug verification checklist per SDK guidelines

Bug Fixes

• Fixed DCO waveform mapping and saw/PolyBLEP edge artifacts
• Reset HPF state on voice trigger to avoid carryover
• Fixed mono/unison last-note priority edge cases
• Resolved VoiceAllocator symbol resolution issues
• Eliminated undefined reference errors from static constexpr members

Knob Catch Mechanism

New Feature: Generic knob catch to prevent audio jumps on preset changes

• Applied to 9 continuous parameters (cutoff, mix, resonance, etc.)
• Fixed ±3 unit threshold for intuitive, consistent behavior
• Transparent support for both unipolar and bipolar parameters
• Reusable across all drumlogue units via new catchable_value.h utility
• Behavior: When knob position differs from preset, DSP holds preset value until knob crosses catch threshold

Performance

• Velocity modulation: 50% depth on VCF cutoff
• Pitch bend: ±2 semitones with smooth vibrato response
• Pressure modulation: +1 octave VCF swell with expressive feel
• All MIDI modulations: Per-buffer smoothing (exponential convergence)
• CPU usage: Maintained <50% on 48kHz buffer processing

Compatibility

• Backward Compatible: All v1.1.0 presets and functionality preserved
• MIDI Enhancement: Optional - MIDI controllers enhance but don't require modification
• Hardware Requirements: Standard drumlogue with MIDI input support

---

v1.1.0 - 2025-12-29

🚀 Major Feature Update

Second major release of Drupiter, introducing polyphonic capabilities, expanded waveforms, and advanced modulation features.

New Features

Synthesis Modes:

• Polyphonic Mode: True polyphony with voice allocation system
• Unison Mode: Rich ensemble effects with golden ratio detuning and stereo spread
• Mono Mode: Classic monophonic operation (backward compatible)

Expanded Waveforms:

• 5 Waveforms per Oscillator: SAW/SQR/PULSE/TRI/SAW_PWM (previously 4)
• SAW PWM: Pulse-width modulated sawtooth waves for rich, evolving timbral character
• Enhanced Pulse Width Control: Improved PWM implementation for all pulse-based waveforms

Advanced Modulation:

• ENV TO PITCH: Filter envelope can now modulate oscillator pitch (±12 semitones)
• Extended Modulation Hub: 18 modulation destinations including:
  • Synth mode switching (Mono/Poly/Unison)
  • Unison detune amount
  • Portamento/glide time
  • Enhanced LFO routing

Performance & Playability:

• Portamento/Glide: True legato detection with exponential glide curves
• Voice Allocation: Intelligent polyphonic voice management
• Enhanced Presets: Expanded from 6 to 12 factory presets covering new features

Technical Improvements

• DSP Architecture: Complete rewrite with modular voice allocation system
• Performance Monitoring: Integrated cycle counting for CPU usage optimization
• QEMU ARM Testing: Enhanced test harness with automatic rebuilding
• Build System: Improved container builds with performance monitoring support

Presets

New Presets (7-12):

• 7. PWM Lead - Pulse-width modulated sawtooth lead
• 8. Unison Pad - Rich ensemble pad with golden ratio detuning
• 9. Poly Bass - Polyphonic bass with glide
• 10. ENV FM - Filter envelope modulating pitch
• 11. Stereo Unison - Wide stereo ensemble effects
• 12. Glide Lead - Smooth portamento lead sound

Existing Presets (1-6):

• 1. Jupiter Bass - Deep, punchy bass
• 2. Jupiter Lead - Bright, cutting lead
• 3. Sync Lead - Hard-synced aggressive lead
• 4. FM Bell - Cross-modulated bell tones
• 5. Analog Pad - Warm, evolving pad
• 6. Poly Arp - Bright arpeggiator sound

Compatibility

• Backward Compatible: All existing presets and mono mode operation preserved
• Hardware Requirements: No additional hardware requirements
• Firmware: Compatible with all drumlogue firmware versions

Bug Fixes

• Improved parameter smoothing for glitch-free modulation
• Enhanced voice stealing algorithm for better polyphonic performance
• Fixed edge cases in unison detuning calculations

---

v1.0.0 - 2024-12-18

🎉 Initial Release

First stable release of Drupiter, a Jupiter-8 inspired monophonic synthesizer for Korg drumlogue.

Features

Oscillators:

• Dual DCOs with 4 waveforms each (Ramp, Square, Pulse, Triangle)
• Hard sync (DCO1 → DCO2) for aggressive timbres
• Cross-modulation (DCO2 → DCO1 FM) for complex harmonic content
• DCO-1: octave selection (16', 8', 4')
• DCO-2: octave selection (32', 16', 8', 4')
• Pulse width control for pulse waveforms
• Detune control for DCO2

Filter:

• Multi-mode filter (LP12, LP24, HP12, BP12)
• Self-oscillation capability
• Envelope amount and keyboard tracking
• Resonance control

Modulation:

• Dual ADSR envelopes (VCF and VCA)
• LFO with 4 waveforms (Triangle, Sawtooth, Square, S&H)
• LFO delay envelope for gradual modulation
• LFO rate control

Presets:

• 6 factory presets covering common synth sounds

User Interface:

• 24 parameters across 6 pages
• Hub control system for efficient parameter organization
• Clear parameter naming and formatting /Users/mbengtss/code/src/github.com/cldmnky/drumlogue-units/drumlogue/drupiter-synth/RELEASE_NOTES.md

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.drupiter-synth.md for full documentation.

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Built from commit: 2d470f1232b53c7c99c35bcee97f7f981277c7b2

v1.1.0 - 2026-02-07

Improvements

• MOD HUB now uses shared HubControl for consistent destination names and value formatting
• MOD HUB values use a 0-100 UI scale with preset migration from the previous 0-127 range
• Updated PPG waveform resource data
• Smoother wavetable morphing response
• Stereo width smoothing uses the current smoothed value per render for stability
• Per-voice mix headroom scales by voice count

Bug Fixes

• Reset HPF state on voice trigger to prevent filter state carryover
• Fix monophonic last-note priority voice allocation bug
• Clamp filter type selection to valid range

Features

• Polyphonic & Unison Modes: True polyphony with intelligent voice allocation and rich ensemble effects • 5 Waveforms per Oscillator: SAW/SQR/PULSE/TRI/SAW_PWM (expanded from 4) • SAW PWM: Pulse-width modulated sawtooth waves for evolving timbral character • ENV TO PITCH: Filter envelope modulates oscillator pitch (±12 semitones) • Portamento/Glide: True legato detection with exponential glide curves • Extended Modulation Hub: 18 modulation destinations including synth mode switching • 12 Factory Presets: Expanded from 6 with new polyphonic and unison sounds

Technical Details

• Complete DSP architecture rewrite with modular voice allocation system • Intelligent polyphonic voice management and unison detuning • Enhanced PWM implementation for all pulse-based waveforms • Integrated performance monitoring with cycle counting • QEMU ARM testing support for validation

Installation

1. Download drupiter_synth.drmlgunit below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the Units/Synth/ folder on the drumlogue
4. Safely eject and restart your drumlogue

clouds-revfx v1.2.1

Release Notes

Clouds Reverb FX - Release Notes

v1.2.1 (December 2025)

Important: Removed preset support due to drumlogue hardware limitation.

Breaking Changes

• Presets removed - Due to a known hardware limitation/bug in the drumlogue firmware, presets are not supported for reverb and delay effects. All preset-related code and documentation has been removed.
  • Previously defined presets (INIT, HALL, PLATE, SHIMMER, CLOUD, FREEZE, OCTAVER, AMBIENT) served as usage examples but were never functional on hardware
  • All parameters remain accessible and can be saved in drumlogue user patterns/songs

Documentation Updates

• Removed all preset references from README and documentation
• Added note about hardware limitation in features section
• Updated usage tips to remove preset-based instructions

---

v1.2.0 (December 2025)

Feature and performance release with NEON optimizations and refined presets.

New Features

• Dual Assignable LFOs - Two independent LFOs with 15 modulation targets each

  • Targets: DRY/WET, TIME, DIFFUSION, LP, INPUT GAIN, TEXTURE, all GRAIN params, all SHIFT params
  • 3 waveforms: Sine, Saw, Random (S&H)
  • Cross-modulation: LFO1 can modulate LFO2 speed
  • 8 new parameters on pages 5-6

• NEON SIMD Optimizations - Significant performance improvements on ARM Cortex-A7

  • SanitizeAndClamp: Vectorized NaN removal and output clamping
  • InterleaveStereo: Fast stereo buffer interleaving
  • FastTanh4: 4-way parallel soft saturation

• Refined Presets - All 8 presets redesigned for distinct sonic character

  • NOTE: These presets were never functional on drumlogue hardware due to a firmware limitation. Removed in v1.2.1.
  • INIT: Neutral starting point with balanced parameters
  • HALL: Large concert hall with long decay, slightly dark
  • PLATE: Classic bright plate with max diffusion
  • SHIMMER: Ethereal octave-up with grain sparkle and LFO modulation
  • CLOUD: Dense granular with dual LFO (position + density)
  • FREEZE: Infinite sustain pad machine
  • OCTAVER: Sub-octave thickener (-12 semitones)
  • AMBIENT: Evolving wash with dual LFO on texture/density

Bug Fixes

Note about preset bug** (#24): While we attempted to fix preset selector issues, presets are fundamentally not supported on drumlogue hardware for reverb/delay effects. This is a known firmware limitation. All preset code has been removed in v1.2.1.sses

• Fixed preset loading: use setParameter() to ensure proper DSP state updates
• Fixed missing symbol: added stmlib/utils/random.cc to build

Technical Improvements

• Parameter smoothing prevents zipper noise during preset changes
• Moved shared NEON utilities to common/neon_dsp.h
• Stack allocation optimized (temp buffers moved to class members)

Parameters (6 Pages)

Page	Parameters
1 - Main	DRY/WET, TIME, DIFFUSION, LP DAMP
2 - Texture	IN GAIN, TEXTURE, GRAIN AMT, GRN SIZE
3 - Granular	GRN DENS, GRN PITCH, GRN POS, FREEZE
4 - Pitch	SHIFT AMT, SHFT PTCH, SHFT SIZE, —
5 - LFO1	LFO1 ASGN, LFO1 SPD, LFO1 DPTH, LFO1 WAVE
6 - LFO2	LFO2 ASGN, LFO2 SPD, LFO2 DPTH, LFO2 WAVE

---

v1.1.0 (December 2025)

Added dual assignable LFOs for dynamic modulation.

New Features

• Dual LFOs with 15 assignable modulation targets
• 3 Waveforms: Sine, Saw, Random
• Cross-modulation: LFO1 → LFO2 speed

---

v1.0.0 (December 2025)

First stable release.

Changes from v1.0.0-pre

• Fixed undefined symbol (stmlib/utils/random.cc)
• Validated all presets

---

v1.0.0-pre (Initial Pre-release)

This is the initial pre-release of the Clouds Reverb FX unit for Korg drumlogue.

Features

• Lush Reverb Engine - Based on the acclaimed Griesinger/Dattorro topology from Mutable Instruments Clouds
• Texture Processing - Post-reverb diffusion for additional smearing and atmospheric depth
• Micro-Granular Processing - Ambient textures with freeze capability for drone and pad sounds
• Pitch Shifter - Shimmer and octave effects with adjustable window size
• 16 Parameters across 4 pages for deep sound design
• 8 Built-in Presets - INIT, HALL, PLATE, SHIMMER, CLOUD, FREEZE, OCTAVER, AMBIENT
• Parameter Smoothing - Zipper-noise-free transitions for live performance
• CPU Optimization - Automatic bypass for disabled effect stages

Parameters

Page	Parameters
1 - Main	DRY/WET, TIME, DIFFUSION, LP DAMP
2 - Texture	IN GAIN, TEXTURE, GRAIN AMT, GRN SIZE
3 - Granular	GRN DENS, GRN PITCH, GRN POS, FREEZE
4 - Pitch	SHIFT AMT, SHFT PTCH, SHFT SIZE

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo in/out
• Latency: Minimal (block-based processing)

Credits

• DSP Algorithms based on Mutable Instruments Clouds by Émilie Gillet
• Original License: MIT License
• drumlogue Port: Adapted for Korg logue SDK

Known Issues

• This is a pre-release version for testing purposes
• Please report any issues on the GitHub repository

What's Next

• Full release after community testing
• Potential parameter refinements based on feedback

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/RevFX/
4. Safely eject the drumlogue and restart it

Documentation

See README.clouds-revfx.md for full documentation.

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Built from commit: a30116eba88f7497db57c1b49ec8bdc24e5effbc

drupiter-synth v1.0.0

Release Notes

Release Notes - Drupiter Synth

v1.0.0 - 2025-12-18

🎉 Initial Release

First stable release of Drupiter, a Jupiter-8 inspired monophonic synthesizer for Korg drumlogue.

Features

Oscillators:

• Dual DCOs with 4 waveforms each (Ramp, Square, Pulse, Triangle)
• Hard sync (DCO1 → DCO2) for aggressive timbres
• Cross-modulation (DCO2 → DCO1 FM) for complex harmonic content
• Independent octave selection (16', 8', 4')
• Pulse width control for pulse waveforms
• Detune control for DCO2

Filter:

• Multi-mode filter (LP12, LP24, HP12, BP12)
• Self-oscillation capability
• Envelope amount and keyboard tracking
• Resonance control

Modulation:

• Dual ADSR envelopes (VCF and VCA)
• LFO with 4 waveforms (Triangle, Sawtooth, Square, S&H)
• LFO delay envelope for gradual modulation
• LFO rate control

Presets:

• 6 factory presets covering common synth sounds:
  1. Jupiter Bass - Deep, punchy bass
  2. Jupiter Lead - Bright, cutting lead
  3. Sync Lead - Hard-synced aggressive lead
  4. FM Bell - Cross-modulated bell tones
  5. Analog Pad - Warm, evolving pad
  6. Poly Arp - Bright arpeggiator sound

User Interface:

• 24 parameters across 6 pages
• Hub control system for efficient parameter organization
• Clear parameter naming and formatting
• Velocity sensitivity for VCA envelope

Technical Details

• Sample Rate: 48 kHz
• Monophonic: Single voice
• CPU Usage: Optimized for real-time performance
• Memory: Efficient fixed-size buffers
• MIDI: Full note on/off support with velocity

Known Issues

None at this time.

Installation

1. Download drupiter_synth.drmlgunit
2. Copy to Units/ folder on drumlogue via USB
3. Power cycle the drumlogue
4. Select "Drupiter" from synth menu

Credits

• Based on Bristol Jupiter-8 emulation
• Developed by CLDM
• Built with Korg logue SDK

---

For detailed parameter documentation, see README.md. For UI reference guide, see UI.md.

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

---

Built from commit: fec12063383ba02a0705cde45ed50c711a23952e

elementish-synth v1.2.0

Release Notes

Elementish Synth - Release Notes

v1.2.0 (December 2025)

Generative sequencer release with Marbles-inspired note generation.

New Features

• Marbles-Inspired Generative Sequencer (Lightweight mode only)

  • Triggered by drumlogue pattern sequencer or MIDI notes
  • Generates tempo-synced melodic subdivisions
  • 16 presets combining subdivision rate and scale quantization

• 16 Sequencer Presets

  • OFF: Normal note playback
  • SLOW/MED/FAST: 1/2/4 notes per beat (chromatic)
  • X2/X4: 8/16 notes per beat (extreme subdivisions)
  • MAJ/MIN/PENT/CHROM: Scale-quantized 16th notes
  • OCT/5TH/4TH: Interval-based 8th notes
  • TRI: Triplet feel with triad quantization
  • 7TH: 16th notes quantized to 7th chord tones
  • RAND: Random scale selection per trigger

• Déjà Vu Loop Buffer

  • 8-step pattern memory
  • DEJA VU parameter: 0 = fully random, 127 = locked loop
  • Creates repeating melodic patterns from randomness

• SPREAD Control

  • Adjusts note range from unison (0) to ±24 semitones (127)
  • Works with scale quantization for musical results

Technical Improvements

• Skip-ahead optimization in Process() - no per-sample iteration
• Note queue (8-deep circular buffer) prevents note loss at high subdivisions
• Gate triggering - works with drumlogue's built-in pattern sequencer
• Bounds checking on preset selection for safety

Page 6 Parameter Changes (Lightweight Mode)

Parameter	Description
COARSE	Base note for sequencer (±24 semitones from middle C)
SEQ	Sequencer preset (0-15)
SPREAD	Note range (0-127)
DEJA VU	Pattern looping (0-127)

Build Info

• Binary size: ~124KB
• All 16 sequencer presets validated
• Gate and MIDI triggering tested

---

v1.1.0 (December 2025)

Performance optimization release with ARM NEON SIMD support.

New Features

• NEON SIMD Optimizations - Significant performance improvements on ARM Cortex-A7
  • Modal resonator: ~40% speedup (4-way parallel SVF processing)
  • CosineOscillator batch compute: ~2.4x faster amplitude calculation
  • Stereo soft clamp: 2x faster output processing
  • FastTanh saturation: ~20% speedup (4 values simultaneously)

Technical Improvements

• Structure-of-Arrays (SoA) layout for mode coefficients eliminates scatter-gather overhead in NEON loop
• NaN protection and stability checks in NEON mode processing loop
• Optimized CosineOscillator::Next4() batch method for modal amplitude modulation
• Vectorized stereo output processing using float32x2_t

Internal Changes

• Moved NEON DSP utilities to shared common/neon_dsp.h library
• Added SyncSoAFromModes()/SyncSoAToModes() for efficient coefficient sync
• Coefficient sync only happens when parameters change (not per-sample)

Build Info

• Binary size: ~124KB (minimal increase for NEON paths)
• All 8 presets validated
• All 3 resonator modes (MODAL/STRING/MSTRING) tested

---

v1.0.0 (December 2025)

Initial release of Elementish Synth for Korg drumlogue.

Features

• Modal Synthesis Engine - Port of Mutable Instruments Elements
• Three Excitation Types:
  • BOW: Continuous friction/bowing with adjustable timbre
  • BLOW: Granular noise/breath with flow control
  • STRIKE: Percussive impacts (5 modes: SAMPLE, GRANULAR, NOISE, PLECTRUM, PARTICLE)
• Three Resonator Models:
  • MODAL: Classic 8-partial modal resonator
  • STRING: Karplus-Strong string synthesis
  • MSTRING: 5 sympathetic strings for rich harmonic content
• 12 Mallet Types: SOFT/MED/HARD/PLEC/STIK/BOW × DK(dark)/BR(bright)
• 8 Factory Presets: Init, Bowed Str, Bell, Pluck, Blown, Marimba, String, Drone
• Full MIDI Support: Velocity-sensitive dynamics, pitch bend (+/- 2 semitones)
• 24 Parameters across 6 pages
• Stereo Width Control via SPACE parameter

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo output
• Optimized for Cortex-A7 with NEON disabled in initial release

Credits

• DSP Algorithms based on Mutable Instruments Elements by Émilie Gillet
• Original License: MIT License

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.elementish-synth.md for full documentation.

---

Built from commit: 7845d3ee5461f084b99e7378465886ffaa12baac

pepege-synth v1.0.0

Release Notes

Pepege-Synth - Release Notes

v1.0.0 (December 2025)

Initial release of Pepege-Synth for Korg drumlogue.

Features

• 2-Voice Polyphony - Play chords and harmonies

• Dual PPG Wavetable Oscillators - Authentic 8-bit character

  • 16 wavetable banks (256 waves total)
  • Independent octave and tuning controls
  • Three PPG interpolation modes: HiFi, LoFi, Raw
  • Morphing wavetable position

• Wavetable Banks

  • UPPER: Classic PPG upper harmonics
  • RESNT1/RESNT2: Resonant waveforms
  • MELLOW/BRIGHT/HARSH: Timbral variations
  • CLIPPR: Clipped/distorted waves
  • SYNC: Sync-style waves
  • PWM: Pulse width modulation
  • VOCAL1/VOCAL2: Formant-like vowels
  • ORGAN: Harmonic organ tones
  • BELL: Metallic/bell sounds
  • ALIEN: Strange/experimental
  • NOISE: Noise-based textures
  • SPECAL: Special effects

• State Variable Filter - Four filter types

  • LP12: 12dB/octave lowpass
  • LP24: 24dB/octave lowpass
  • HP12: 12dB/octave highpass
  • BP12: 12dB/octave bandpass

• Dual ADSR Envelopes

  • Independent amp and filter envelopes
  • Full ADSR control for each

• Global LFO

  • Six shapes: Sine, Triangle, Saw Up, Saw Down, Square, Sample & Hold
  • Assignable to oscillator morph and filter cutoff

• MOD HUB - Centralized modulation routing

  • 8 destinations with dedicated parameter page
  • LFO speed and shape selection
  • LFO to wavetable morph (±100%)
  • LFO to filter cutoff (±100%)
  • Velocity to filter (0-100%)
  • Filter key tracking (0-100%)
  • Oscillator B detune (±32 cents)
  • Pitch bend range (±2/7/12/24 semitones)

• Stereo Output

  • Adjustable stereo width (SPACE parameter)
  • NEON-optimized stereo processing

• 6 Factory Presets

  • Glass Keys: Bright bell-like plucks
  • Dust Pad: Atmospheric evolving pad
  • Sync Bass: Aggressive sync lead
  • Noise Sweep: Sweeping noise FX
  • Pluck: Short percussive plucks
  • PWM Lead: Classic pulse lead

Voice Allocation

• Round-robin with oldest-note stealing
• Smooth envelope transitions on voice stealing
• Polyphonic pitch bend and aftertouch

Technical Details

• Built with Korg logue SDK
• Based on PPG wavetable synthesis
• ARM Cortex-A7 optimized
• 48kHz sample rate
• NEON SIMD optimizations for output stage

Controls

Page 1 - Oscillator A

• A BANK: Wavetable bank selection
• A MORPH: Wave position/morphing
• A OCT: Octave transpose
• A TUNE: Fine tuning

Page 2 - Oscillator B

• B BANK: Wavetable bank selection
• B MORPH: Wave position/morphing
• B OCT: Octave transpose
• OSC MOD: PPG mode (HiFi/LoFi/Raw)

Page 3 - Filter

• CUTOFF: Filter frequency
• RESO: Filter resonance
• FLT ENV: Filter envelope amount
• FLT TYPE: Filter type (LP12/LP24/HP12/BP12)

Page 4 - Amp Envelope

• ATTACK: Envelope attack time
• DECAY: Envelope decay time
• SUSTAIN: Envelope sustain level
• RELEASE: Envelope release time

Page 5 - Filter Envelope

• F.ATTACK: Filter attack time
• F.DECAY: Filter decay time
• F.SUSTAIN: Filter sustain level
• F.RELEASE: Filter release time

Page 6 - MOD HUB & Output

• MOD SEL: Select modulation destination
• MOD VAL: Set value for selected destination
• OSC MIX: A/B oscillator balance
• SPACE: Stereo width

Build Info

• Binary size: ~30KB
• RAM usage: ~1KB
• 2 polyphonic voices
• All 16 wavetable banks included
• 6 factory presets

Credits

• Inspired by VAST Dynamics Vaporizer2
• Wavetable techniques from Mutable Instruments Plaits
• PPG wavetable data from Mutable Instruments codebase

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

---

Built from commit: 7845d3ee5461f084b99e7378465886ffaa12baac

clouds-revfx v1.2.0

Release Notes

Clouds Reverb FX - Release Notes

v1.2.0 (December 2025)

Feature and performance release with NEON optimizations and refined presets.

New Features

• Dual Assignable LFOs - Two independent LFOs with 15 modulation targets each

  • Targets: DRY/WET, TIME, DIFFUSION, LP, INPUT GAIN, TEXTURE, all GRAIN params, all SHIFT params
  • 3 waveforms: Sine, Saw, Random (S&H)
  • Cross-modulation: LFO1 can modulate LFO2 speed
  • 8 new parameters on pages 5-6

• NEON SIMD Optimizations - Significant performance improvements on ARM Cortex-A7

  • SanitizeAndClamp: Vectorized NaN removal and output clamping
  • InterleaveStereo: Fast stereo buffer interleaving
  • FastTanh4: 4-way parallel soft saturation

• Refined Presets - All 8 presets redesigned for distinct sonic character

  • INIT: Neutral starting point with balanced parameters
  • HALL: Large concert hall with long decay, slightly dark
  • PLATE: Classic bright plate with max diffusion
  • SHIMMER: Ethereal octave-up with grain sparkle and LFO modulation
  • CLOUD: Dense granular with dual LFO (position + density)
  • FREEZE: Infinite sustain pad machine
  • OCTAVER: Sub-octave thickener (-12 semitones)
  • AMBIENT: Evolving wash with dual LFO on texture/density

Bug Fixes

• Fixed preset handling: getPresetName() now returns nullptr for invalid indices
• Fixed preset loading: moved preset data to file scope for stable memory addresses
• Fixed preset loading: use setParameter() to ensure proper DSP state updates
• Fixed missing symbol: added stmlib/utils/random.cc to build

Technical Improvements

• Parameter smoothing prevents zipper noise during preset changes
• Moved shared NEON utilities to common/neon_dsp.h
• Stack allocation optimized (temp buffers moved to class members)

Parameters (6 Pages)

Page	Parameters
1 - Main	DRY/WET, TIME, DIFFUSION, LP DAMP
2 - Texture	IN GAIN, TEXTURE, GRAIN AMT, GRN SIZE
3 - Granular	GRN DENS, GRN PITCH, GRN POS, FREEZE
4 - Pitch	SHIFT AMT, SHFT PTCH, SHFT SIZE, —
5 - LFO1	LFO1 ASGN, LFO1 SPD, LFO1 DPTH, LFO1 WAVE
6 - LFO2	LFO2 ASGN, LFO2 SPD, LFO2 DPTH, LFO2 WAVE

---

v1.1.0 (December 2025)

Added dual assignable LFOs for dynamic modulation.

New Features

• Dual LFOs with 15 assignable modulation targets
• 3 Waveforms: Sine, Saw, Random
• Cross-modulation: LFO1 → LFO2 speed

---

v1.0.0 (December 2025)

First stable release.

Changes from v1.0.0-pre

• Fixed undefined symbol (stmlib/utils/random.cc)
• Validated all presets

---

v1.0.0-pre (Initial Pre-release)

This is the initial pre-release of the Clouds Reverb FX unit for Korg drumlogue.

Features

• Lush Reverb Engine - Based on the acclaimed Griesinger/Dattorro topology from Mutable Instruments Clouds
• Texture Processing - Post-reverb diffusion for additional smearing and atmospheric depth
• Micro-Granular Processing - Ambient textures with freeze capability for drone and pad sounds
• Pitch Shifter - Shimmer and octave effects with adjustable window size
• 16 Parameters across 4 pages for deep sound design
• 8 Built-in Presets - INIT, HALL, PLATE, SHIMMER, CLOUD, FREEZE, OCTAVER, AMBIENT
• Parameter Smoothing - Zipper-noise-free transitions for live performance
• CPU Optimization - Automatic bypass for disabled effect stages

Parameters

Page	Parameters
1 - Main	DRY/WET, TIME, DIFFUSION, LP DAMP
2 - Texture	IN GAIN, TEXTURE, GRAIN AMT, GRN SIZE
3 - Granular	GRN DENS, GRN PITCH, GRN POS, FREEZE
4 - Pitch	SHIFT AMT, SHFT PTCH, SHFT SIZE

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo in/out
• Latency: Minimal (block-based processing)

Credits

• DSP Algorithms based on Mutable Instruments Clouds by Émilie Gillet
• Original License: MIT License
• drumlogue Port: Adapted for Korg logue SDK

Known Issues

• This is a pre-release version for testing purposes
• Please report any issues on the GitHub repository

What's Next

• Full release after community testing
• Potential parameter refinements based on feedback

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/RevFX/
4. Safely eject the drumlogue and restart it

Documentation

See README.clouds-revfx.md for full documentation.

---

Built from commit: 0ad5e36f931c2e2d2e14b7d1984e6577a6f4a44b

elementish-synth v1.1.0

Release Notes

Elementish Synth - Release Notes

v1.1.0 (December 2025)

Performance optimization release with ARM NEON SIMD support.

New Features

• NEON SIMD Optimizations - Significant performance improvements on ARM Cortex-A7
  • Modal resonator: ~40% speedup (4-way parallel SVF processing)
  • CosineOscillator batch compute: ~2.4x faster amplitude calculation
  • Stereo soft clamp: 2x faster output processing
  • FastTanh saturation: ~20% speedup (4 values simultaneously)

Technical Improvements

• Structure-of-Arrays (SoA) layout for mode coefficients eliminates scatter-gather overhead in NEON loop
• NaN protection and stability checks in NEON mode processing loop
• Optimized CosineOscillator::Next4() batch method for modal amplitude modulation
• Vectorized stereo output processing using float32x2_t

Internal Changes

• Moved NEON DSP utilities to shared common/neon_dsp.h library
• Added SyncSoAFromModes()/SyncSoAToModes() for efficient coefficient sync
• Coefficient sync only happens when parameters change (not per-sample)

Build Info

• Binary size: ~124KB (minimal increase for NEON paths)
• All 8 presets validated
• All 3 resonator modes (MODAL/STRING/MSTRING) tested

---

v1.0.0 (December 2025)

Initial release of Elementish Synth for Korg drumlogue.

Features

• Modal Synthesis Engine - Port of Mutable Instruments Elements
• Three Excitation Types:
  • BOW: Continuous friction/bowing with adjustable timbre
  • BLOW: Granular noise/breath with flow control
  • STRIKE: Percussive impacts (5 modes: SAMPLE, GRANULAR, NOISE, PLECTRUM, PARTICLE)
• Three Resonator Models:
  • MODAL: Classic 8-partial modal resonator
  • STRING: Karplus-Strong string synthesis
  • MSTRING: 5 sympathetic strings for rich harmonic content
• 12 Mallet Types: SOFT/MED/HARD/PLEC/STIK/BOW × DK(dark)/BR(bright)
• 8 Factory Presets: Init, Bowed Str, Bell, Pluck, Blown, Marimba, String, Drone
• Full MIDI Support: Velocity-sensitive dynamics, pitch bend (+/- 2 semitones)
• 24 Parameters across 6 pages
• Stereo Width Control via SPACE parameter

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo output
• Optimized for Cortex-A7 with NEON disabled in initial release

Credits

• DSP Algorithms based on Mutable Instruments Elements by Émilie Gillet
• Original License: MIT License

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.elementish-synth.md for full documentation.

---

Built from commit: 34ea84bbb7e0719ea42a4fadb6489cfc2fdfb0fa

elementish-synth v1.0.0

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

Documentation

See README.elementish-synth.md for full documentation.

---

Built from commit: dfc8655d833287209d8458fb7f212f9e03043cd0

elementish-synth v1.0.0-pre1

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/Synth/
4. Safely eject the drumlogue and restart it

---

Built from commit: 9ef8397ae8ec5b35ed0349b71d62885e4d764a11

Features

• Dual assignable LFOs (LFO1 and LFO2) with independent controls
• 16 modulation targets including:
  • Core reverb parameters (dry/wet, time, diffusion, LP damping)
  • Input gain and texture
  • Granular parameters (amount, size, density, pitch, position)
  • Pitch shifter parameters (amount, pitch, size)
  • Cross-modulation: LFO1 can modulate LFO2 speed
• 3 waveforms: Sine, Saw, Random (smoothly interpolated)
• Exponential speed mapping (~0.05Hz to ~10Hz) for musical control
• 24 parameters across 6 pages
• Updated AMBIENT preset with LFO modulation example

Technical Details

• LFOs run at control rate (once per audio block) for CPU efficiency
• Parameter smoothing prevents zipper noise during modulation
• Modulation applied additively to base parameter values

Installation

1. Download clouds_revfx.drmlgunit below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the Units/RevFX/ folder on the drumlogue
4. Safely eject and restart your drumlogue

clouds-revfx v1.0.0-pre

Release Notes

Clouds Reverb FX - Release Notes

v1.0.0-pre (Initial Pre-release)

This is the initial pre-release of the Clouds Reverb FX unit for Korg drumlogue.

Features

• Lush Reverb Engine - Based on the acclaimed Griesinger/Dattorro topology from Mutable Instruments Clouds
• Texture Processing - Post-reverb diffusion for additional smearing and atmospheric depth
• Micro-Granular Processing - Ambient textures with freeze capability for drone and pad sounds
• Pitch Shifter - Shimmer and octave effects with adjustable window size
• 16 Parameters across 4 pages for deep sound design
• 8 Built-in Presets - INIT, HALL, PLATE, SHIMMER, CLOUD, FREEZE, OCTAVER, AMBIENT
• Parameter Smoothing - Zipper-noise-free transitions for live performance
• CPU Optimization - Automatic bypass for disabled effect stages

Parameters

Page	Parameters
1 - Main	DRY/WET, TIME, DIFFUSION, LP DAMP
2 - Texture	IN GAIN, TEXTURE, GRAIN AMT, GRN SIZE
3 - Granular	GRN DENS, GRN PITCH, GRN POS, FREEZE
4 - Pitch	SHIFT AMT, SHFT PTCH, SHFT SIZE

Technical Details

• Sample Rate: 48kHz (native drumlogue)
• Processing: Stereo in/out
• Latency: Minimal (block-based processing)

Credits

• DSP Algorithms based on Mutable Instruments Clouds by Émilie Gillet
• Original License: MIT License
• drumlogue Port: Adapted for Korg logue SDK

Known Issues

• This is a pre-release version for testing purposes
• Please report any issues on the GitHub repository

What's Next

• Full release after community testing
• Potential parameter refinements based on feedback

Installation

1. Download the .drmlgunit file from the assets below
2. Connect your drumlogue to your computer via USB
3. Copy the file to the appropriate Units/ folder:
   • Units/RevFX/
4. Safely eject the drumlogue and restart it

Documentation

See README.clouds-revfx.md for full documentation.

---

Built from commit: c2fcab40dafbc709a5f5f3493cedc9ee37a243ee