A collection of audio plugins written in Rust for the Maolan ecosystem. All plugins implement the CLAP plugin API and include an Iced-based GUI using the TokyoNight theme.
| Plugin | ID | I/O | Description |
|---|---|---|---|
| Drust | rs.maolan.drust |
16× Mono | DrumGizmo-inspired drum sampler |
| Maolan Compressor | rs.maolan.compressor |
Mono / Stereo | 4-band multiband compressor with lookahead and sidechain boost |
| Maolan DeEsser | rs.maolan.deesser |
Stereo | Sibilance reduction processor |
| Maolan Delay | rs.maolan.delay |
Mono / Stereo | Delay with ms / note-sync modes and smooth chasing |
| Maolan EQ | rs.maolan.equalizer |
Mono / Stereo | Parametric EQ with peaking biquad filters |
| Maolan Limiter | rs.maolan.maximizer |
Stereo | Adaptive clipper/limiter with Vintage and Modern variants |
| Maolan Monitoring | rs.maolan.monitoring |
Stereo | Monitoring toolbox with 17 reference modes |
| Maolan Reverb | rs.maolan.reverb |
Mono / Stereo | Stereo reverb |
| Maolan Saturator | rs.maolan.saturator |
Stereo | Waveshape saturation with sine-based distortion |
| Maolan Stereo | rs.maolan.imager |
Stereo | Stereo width processor |
| Maolan Widener | rs.maolan.widener |
Stereo | Multiband stereo width processor |
| Rural Modeler | rs.maolan.ruralmodeler |
Mono | Neural Amp Modeler with IR convolution |
A drum sampler plugin based on DrumGizmo. Supports loading drum kits asynchronously, MIDI note triggering with velocity mapping, round-robin sample selection, humanization, and per-output channel balancing. Includes a built-in limiter and 16 mono outputs.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Master Gain | −60.0 ... 12.0 dB | 0.0 | Output gain |
| Enable Resampling | 0 / 1 | 1 | Enable sample-rate conversion |
| Min Velocity | 0 ... 127 | 0 | Minimum input velocity |
| Max Velocity | 0 ... 127 | 127 | Maximum input velocity |
| Resample Quality | 0 ... 3 | 1 | Resampler quality level |
| Humanize Amount | 0.0 ... 100.0 | 8.0 | Timing humanization |
| Round Robin Mix | 0.0 ... 1.0 | 0.7 | Round-robin blend |
| Bleed Amount | 0.0 ... 100.0 | 100.0 | Mic bleed level |
| Limiter Threshold | −48.0 ... 0.0 dB | −3.0 | Limiter threshold |
| Normalize Samples | 0 / 1 | 1 | Auto-normalize loaded samples |
| Random Seed | 0 ... 1000 | 0 | Humanization seed |
| Voice Limit Max | 1 ... 128 | 128 | Max simultaneous voices |
| Voice Limit Rampdown | 0.01 ... 2.0 | 0.5 | Voice release rampdown |
| Balance 1–2 ... 15–16 | −1.0 ... 1.0 | 0.0 | Per-output stereo balance |
Output channels: Kick L/R, Snare L/R, HiHat L/R, Toms L/R, Ride L/R, Crash L/R, China/Splash L/R, Ambience L/R
A 4-band multiband compressor with LR4 crossover splits. Supports Peak/RMS sidechain detection, downward/upward/boosting modes, lookahead delay, and sidechain boost options. Based on the LSP compressor design.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Input Gain | −24.0 ... 24.0 dB | 0.0 | Input gain staging |
| Output Gain | −24.0 ... 24.0 dB | 0.0 | Output gain staging |
| Dry Gain | 0.0 ... 1.0 | 0.0 | Dry mix amount |
| Wet Gain | 0.0 ... 1.0 | 1.0 | Wet mix amount |
| Sidechain Mode | 0=Peak, 1=RMS | 1 | Sidechain detection type |
| Bypass | 0 / 1 | 0 | Global bypass |
| Split 1 / 2 / 3 | 20 ... 18000 Hz | 120, 1000, 6000 | Crossover frequencies |
| Band 1–4 Threshold | −60.0 ... 0.0 dB | −12.0 | Band compression threshold |
| Band 1–4 Ratio | 1.0 ... 100.0 | 4.0 | Band compression ratio |
| Band 1–4 Attack | 0.0 ... 2000.0 ms | 20.0 | Band attack time |
| Band 1–4 Release | 0.0 ... 5000.0 ms | 100.0 | Band release time |
| Band 1–4 Knee | 0.0 ... 24.0 dB | 6.0 | Band knee width |
| Band 1–4 Makeup | −24.0 ... 24.0 dB | 0.0 | Band makeup gain |
| Mode | 0=Downward, 1=Upward, 2=Boosting | 0 | Compression mode |
| Lookahead | 0.0 ... 20.0 ms | 0.0 | Lookahead delay |
| SC Boost | 0=Off, 1=BT+3dB, 2=MT+3dB, 3=BT+6dB, 4=MT+6dB | 0 | Sidechain boost option |
| Topology | 0=Classic, 1=Modern | 1 | Compressor topology |
A sibilance reduction processor that detects ess sounds by analyzing slew-rate patterns across a configurable sample window. Uses IIR smoothing and dynamic ratio reduction to attenuate sibilance while preserving the rest of the signal. Includes a monitor mode for hearing exactly what is being removed.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Intensity | 0.0 ... 1.0 | 0.5 | Sensitivity / threshold |
| Sharpness | 0.0 ... 1.0 | 0.5 | Detection window size (2–40 samples) |
| Depth | 0.0 ... 1.0 | 0.5 | Maximum reduction amount |
| Filter | 0.0 ... 1.0 | 0.5 | IIR smoothing amount |
| Monitor | 0 / 1 | 0 | Output delta (removed signal) when enabled |
A stereo delay with two time modes: fixed milliseconds or tempo-synced note divisions. Uses circular buffers with linear interpolation and smooth delay-time chasing to avoid clicks when the time changes.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Time Mode | 0=ms, 1=Note | 0 | Toggle between fixed ms and tempo-synced note |
| Time (ms) | 1.0 ... 5000.0 ms | 375.0 | Fixed delay time |
| Time (note) | 0.0 ... 1.0 | 0.75 | Maps to 16 note divisions (1/1 ... 1/8d) |
| Feedback | 0.0 ... 1.0 | 0.3 | Feedback amount |
| Dry/Wet | 0.0 ... 1.0 | 0.5 | Mix balance |
Note divisions: 1/1, 1/2, 1/3, 1/4, 1/6, 1/8, 1/12, 1/16, 1/24, 1/32, 1/48, 1/64, 1/1d, 1/2d, 1/4d, 1/8d
In Note mode the plugin reads the host BPM from the CLAP transport each process call.
A Parametric equalizer using peaking biquad filters. Each band has independent frequency, gain, and Q controls.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Input Gain | −24.0 ... 24.0 dB | 0.0 | Input gain staging |
| Output Gain | −24.0 ... 24.0 dB | 0.0 | Output gain staging |
| Bypass | 0 / 1 | 0 | Global bypass |
| Freq | 20.0 ... 20000.0 Hz | 1000.0 | Band center frequency |
| Gain | −24.0 ... 24.0 dB | 0.0 | Band gain |
| Q | 0.1 ... 24.0 | 1.0 | Band Q factor |
Adaptive clipper/limiter with two distinct variants.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Variant | 0=Vintage, 1=Modern | 0 | Algorithm selector |
| Boost | 0.0 ... 1.0 | 0.0 | Input gain boost (up to +18 dB) |
| Soften | 0.0 ... 1.0 | 0.5 | Vintage softness amount |
| Enhance | 0.0 ... 1.0 | 0.5 | Vintage highs/subs lift |
| Ceiling | 0.0 ... 1.0 | 0.5 | Modern output ceiling |
| Mode | 0–7 | 0 | Processing mode (Normal, Atten, Clips, Afterbr, Explode, Nuke, Apocaly, Apothes) |
Algorithms
- Vintage - Boost-based clipping with overshoot detection, highs/lifts enhancement, and adaptive reference clipping
- Modern - Multi-stage clip-only processor with configurable ceiling and stage-based gain staging
Monitoring toolbox with 17 reference modes for checking mixes on different playback systems.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Mode | 0–16 | 0 | Monitoring mode selector |
Modes: Out24, Out16, Peaks, Slew, Subs, Mono, Side, Vinyl, Aurat, MonoRat, MonoLat, Phone, Cans A, Cans B, Cans C, Cans D, VTrick
Stereo reverb built from three allpass-like delay blocks with cross-feedback between channels, vibrato predelay, and input/output lowpass filters.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Replace | 0.0 ... 1.0 | 0.5 | Reverb density / replacement |
| Brightness | 0.0 ... 1.0 | 0.5 | High-frequency content |
| Detune | 0.0 ... 1.0 | 0.5 | Pitch modulation depth |
| Bigness | 0.0 ... 1.0 | 1.0 | Room size |
| Dry/Wet | 0.0 ... 1.0 | 1.0 | Mix balance |
Simple but effective stereo saturator using sine-wave distortion with an intensity-dependent blend.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Drive | 0.0 ... 1.0 | 0.0 | Saturation amount |
Stereo width processor.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Width | 0.0 ... 1.0 | 0.5 | Stereo width |
| Focus | 0.0 ... 1.0 | 0.5 | Focus / center control |
| Amount | 0.0 ... 1.0 | 1.0 | Effect amount |
Mid/side processing with density controls and delay-based focus.
A multiband stereo width processor with independent Low, Mid, and High band controls. Uses LR4 crossover filters and mid/side processing per band.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Output Gain | −4.0 ... 4.0 dB | 0.0 | Output gain staging |
| Boost | 0.0 ... 4.0x | 1.0 | Global side boost |
| Low | 0.0 ... 200.0 % | 100.0 | Low-band width |
| Mid | 0.0 ... 200.0 % | 100.0 | Mid-band width |
| High | 0.0 ... 200.0 % | 100.0 | High-band width |
| Solo Low | 0 / 1 | 0 | Solo low band |
| Solo Mid | 0 / 1 | 0 | Solo mid band |
| Solo High | 0 / 1 | 0 | Solo high band |
| X1 | 40.0 ... 1000.0 Hz | 400.0 | Low/mid crossover |
| X2 | 1000.0 ... 18000.0 Hz | 4000.0 | Mid/high crossover |
| Strength | 1.0 ... 20.0 ms | 5.0 | Width strength |
| Monitor Mode | 0=Stereo, 1=Mono, 2=Side | 0 | Output monitor mode |
A Neural Amp Modeler (NAM) plugin that loads neural network amp models and impulse responses (IRs). Features a noise gate, tone stack (Bass/Mid/Treble), input/output calibration, and DC blocking.
Parameters
| Parameter | Range | Default | Description |
|---|---|---|---|
| Input | −20.0 ... 20.0 dB | 0.0 | Input gain |
| Threshold | −100.0 ... 0.0 dB | −80.0 | Noise-gate threshold |
| Bass | 0.0 ... 10.0 | 5.0 | Tone-stack bass |
| Middle | 0.0 ... 10.0 | 5.0 | Tone-stack mid |
| Treble | 0.0 ... 10.0 | 5.0 | Tone-stack treble |
| Output | −40.0 ... 40.0 dB | 0.0 | Output gain |
| Noise Gate Active | 0 / 1 | 1 | Enable noise gate |
| Tone Stack | 0 / 1 | 1 | Enable tone stack |
| IR Toggle | 0 / 1 | 1 | Enable impulse response |
| Calibrate Input | 0 / 1 | 0 | Enable input calibration |
| Input Calibration Level | −60.0 ... 60.0 dB | 12.0 | Calibration reference |
| Output Mode | 0=Raw, 1=Normalized, 2=Calibrated | 1 | Output loudness mode |
Model/IR loading: Via GUI file picker, or set the environment variables RURAL_MODELER_MODEL
and RURAL_MODELER_IR before starting the host.
cargo build --releaseIn the Windows environment execute the following:
powershell -ExecutionPolicy Bypass -File "\\172.16.0.254\repos\maolan\plugins\build.ps1"
Linux, FreeBSD, macOS, and Windows are supported.
As only CLAP supports changing number of channels while plugin instance is loaded, the decision is to support only that plugin format. With other formats one has to implement mono and stereo plugin and those can not be swapped easily. On top of that, once there's an option for mono, stereo, 2.1, 5.1 and 7.1 the number of plugins becomes huge. Just imagine having 10 plugins with all channel variations: that makes 50 plugins to choose from in a plugin browser. That being said, if LV2 gets support for changing channel number, it will be implemented, but only then.