Roland S-1 Patch Generator

1. Overview & CLAP Setup

The Roland S-1 Patch Generator is a dedicated CLAP plugin that provides complete remote control, parameter automation, and intelligent patch generation for the hardware Roland AIRA Compact S-1 Tweak Synthesizer (which is based on the classic SH-101 architecture).

Roland S-1 CLAP Plugin Interface in Action

Active plugin interface displaying real-time parameter feedback and composite waveform preview.

DAW Track Setup

Insert Plugin: Add the CLAP plugin to a MIDI/Instrument track in your DAW (e.g. Bitwig Studio 6, Carla, Reaper).
MIDI Routing: Route the plugin's MIDI output to your Roland S-1 hardware on MIDI Channel 1.
Audio Routing: Route the stereo audio output from your Roland S-1 into the plugin's stereo input for direct monitoring and level control.
Hardware Verification: On the Roland S-1, press [SHIFT] + [MENU], navigate to MIDI, and verify that CC Rx is set to ON.

2. Generator Controls & Style Selectors

The top toolbar houses the intelligent patch generation engine:

⚡ GENERATE PATCH: Triggers the randomized patch generator and instantly transmits all 54 updated parameters to the Roland S-1 hardware via MIDI CC.
STYLE SELECTORS:
- ALL: Open, wide randomization across every parameter.
- PAD: Long attack/release, warm saw/square mix, sub-oscillator body, low cutoff, rich reverb, polyphonic.
- PLUCK: Fast attack (< 20ms), punchy decay, zero sustain, high filter envelope depth, delay focused.
- BASS: Heavy sub level, low octave register, snappy cutoff bite, monophonic with portamento glide.
- LEAD: Mid-to-high register, monophonic with glide, audible vibrato (LFO to pitch), subtle delay/reverb.
- KEY: Balanced oscillator blend, filter key tracking, fast attack, polyphonic, Roland Juno chorus enabled.
- SFX: Unconstrained experimental noises, audio-rate LFOs, extreme resonance, chaotic modulation.
AMOUNT SLIDER:
- 1.00 (100%): Complete regeneration to a fresh sound within the selected style.
- 0.10 – 0.30 (10%–30%): Patch Morphing — nudges current settings subtly toward new targets without destroying your foundation.
- 0.00 (0%): No change.
MODULE LOCKS (🔒 / 🔓): Click any lock icon in a module header to freeze those parameters during generation.

3. Interface Controls

Rotary Knobs: Click and drag vertically (up = increase, down = decrease). A value arc and hover glow indicate current status.
Cycle Buttons: Click to advance to the next state (e.g. wave shapes, octaves, modes).
Waveform Display: Real-time vector preview showing the composite oscillator shape based on current Saw, Square, Sub, Pulse Width, Draw, Chop, and Step/Slope settings.

4. Module Breakdown

Oscillator Section (Cyan)

Controls the core tone generation of the S-1:

Saw & Square & Sub: Independent level controls for the three primary tone generators.
PW & PWM Src: Pulse width and modulation source (LFO, MAN manual, ENV envelope).
Sub Oct: Sub-oscillator octave mode: -1 oct, -2 oct, or -2P (narrow pulse).
Range: Octave footage selection from 64' down to 2'.
Harm ×, Ovt Cut, Cmb Cut: Controls for the S-1's modern Draw and Chop features, multiplying harmonics and sculpting overtone combs.
Step/Slope: Waveform quantization (OFF = smooth analog, STEP = 8-step lo-fi digital, SLOPE = linear smoothed).

Filter (Orange) & Envelope (Green)

Filter Parameters:

Freq & Reso: 4-pole low-pass cutoff and self-oscillating resonance.
Env & LFO: Cutoff modulation depths.
Key Flw: Keyboard tracking (0% = static, 100% = tracks played note).
Bend: Pitch wheel sensitivity to filter cutoff.

Envelope Parameters:

ADSR: Full Attack, Decay, Sustain, and Release times.
Amp Md: GATE (instant on/off) or ENV (full ADSR shaping).
Trig Md: Trigger source: GATE, LFO, G+LFO, or KEY.

LFO (Purple) & Effects / Chord Mode (Pink)

LFO Parameters:

Rate & Wave: Speed and shape (SIN, TRI, SAW, SQR, S&H, RND).
Osc Ptch: LFO pitch vibrato depth.
Mode & Sync: Clock run mode (FREE, SYNC, 1SHT, KEY) and tempo sync.

Effects & Chord Mode:

Reverb & Delay: Wet levels and decay / delay times.
Chorus: Authentic Roland Juno chorus emulation (OFF, CHO1, CHO2, CHO3).
V2, V3, V4 & Shifts: Individual 4-voice chord mode pitch intervals (-24 to +24 semitones).

Performance & Audio (Yellow)

Polyphony Mode: Choose between MONO, POLY (4-voice), UNIS (unison), and CHORD mode.
Portamento: Portamento glide time, master switch (OFF/ON), and legato mode (AUTO/ON).
CLAP Audio Passthrough: Input Gain, Output Level, and Dry/Wet mix balance.

5. Complete MIDI CC Reference (All 54 Parameters)

Every parameter in the plugin communicates via sample-accurate 7-bit MIDI CC messages on Channel 1:

CC	Parameter	Section	Values / Range	Description
1	Mod Whl	Performance	`0 – 127`	Modulation wheel depth
3	Rate	LFO	`0 – 127`	LFO speed / frequency
5	Porto	Performance	`0 – 127`	Portamento glide time
10	Pan	Performance	`0 – 127`	Stereo pan position
11	Expr	Performance	`0 – 127`	Expression pedal input level
12	Wave	LFO	`SIN, TRI, SAW, SQR, S&H, RND`	LFO waveform type
13	Osc Ptch	LFO	`0 – 127`	LFO vibrato depth to pitch
14	Range	Oscillator	`64', 32', 16', 8', 4', 2'`	Octave range footage
15	PW	Oscillator	`0 – 127`	Square wave pulse width
16	PWM Src	Oscillator	`LFO, MAN, ENV`	PWM modulation source
17	Mod Dpth	LFO	`0 – 127`	General mod wheel LFO depth
18	Bend Sns	Performance	`0 – 127`	Pitch bend wheel range sensitivity
19	Square	Oscillator	`0 – 127`	Square / pulse wave level
20	Saw	Oscillator	`0 – 127`	Sawtooth level
21	Sub	Oscillator	`0 – 127`	Sub-oscillator level
22	Sub Oct	Oscillator	`-1, -2, -2P`	Sub-octave type (-2P = narrow pulse)
23	Noise	Oscillator	`0 – 127`	Noise generator level
24	Env	Filter	`0 – 127`	Filter envelope modulation depth
25	LFO	Filter	`0 – 127`	Filter LFO modulation depth
26	Key Flw	Filter	`0 – 127`	Filter keyboard tracking (0–100%)
27	Bend	Filter	`0 – 127`	Filter pitch bend wheel sensitivity
28	Amp Md	Envelope	`GATE, ENV`	VCA amplifier mode (instant vs ADSR)
29	Trig Md	Envelope	`GATE, LFO, G+LFO, KEY`	Envelope trigger source
30	Sustain	Envelope	`0 – 127`	Envelope sustain level
31	Porto Md	Performance	`AUTO, ON`	Portamento legato mode
64	Damper	Performance	`0 – 127`	Sustain pedal switch
65	Porto SW	Performance	`OFF, ON`	Portamento master switch
71	Reso	Filter	`0 – 127`	4-pole filter resonance (self-oscillates)
72	Release	Envelope	`0 – 127`	Envelope release fade time
73	Attack	Envelope	`0 – 127`	Envelope attack rise time
74	Freq	Filter	`0 – 127`	4-pole low-pass cutoff frequency
75	Decay	Envelope	`0 – 127`	Envelope decay fall time
76	Fine Tune	Oscillator	`0 – 127`	Fine pitch tuning
77	Transp	Performance	`0 – 127`	Keyboard pitch transpose
78	Noise Md	Oscillator	`WHITE, PINK`	Noise color spectrum
79	Mode	LFO	`FREE, SYNC, 1SHT, KEY`	LFO clock run mode
80	Poly	Performance	`MONO, POLY, UNIS, CHORD`	Voice allocation mode
81	V2	Chord	`OFF, ON`	Chord voice 2 enable switch
82	V3	Chord	`OFF, ON`	Chord voice 3 enable switch
83	V4	Chord	`OFF, ON`	Chord voice 4 enable switch
85	V2 Shft	Chord	`0 – 127 (-24 to +24 st)`	Voice 2 semitone transposition
86	V3 Shft	Chord	`0 – 127 (-24 to +24 st)`	Voice 3 semitone transposition
87	V4 Shft	Chord	`0 – 127 (-24 to +24 st)`	Voice 4 semitone transposition
89	Rev Time	Effects	`0 – 127`	Reverb decay time
90	Dly Time	Effects	`0 – 127`	Delay repeat timing
91	Reverb	Effects	`0 – 127`	Reverb wet level
92	Delay	Effects	`0 – 127`	Delay wet level
93	Chorus	Effects	`OFF, CHO1, CHO2, CHO3`	Roland Juno chorus type
102	Harm ×	Oscillator	`0 – 127 (1x – 4x)`	Draw harmonic multiplier
103	Ovt Cut	Oscillator	`0 – 127`	Chop overtone filter cut depth
104	Cmb Cut	Oscillator	`0 – 127`	Chop comb filter depth
105	Key Trig	LFO	`OFF, ON`	Key strike phase reset
106	Sync	LFO	`PHAS, FREQ`	LFO tempo sync mode
107	Step/Slope	Oscillator	`OFF, STEP, SLOPE`	Waveform quantization mode

6. Saving Patches to Hardware Memory

When you generate a patch in the plugin that you love, you can commit it directly into the hardware's internal EEPROM memory:

Hold [SHIFT] and press [WRITE] on the physical Roland S-1.
Press one of the 16 step buttons (1–16) to choose a destination pattern/preset slot.
Press [WRITE] again to confirm. All 54 parameters are now permanently saved into the hardware!