reverb

Reverb

#example #audio #query #advanced

Freeverb-based multi-channel reverb processor.

Module Name	Reverb
Type	mtSimple
Color	clAudioModuleColor
Version	1.1
Source	examples/Reverb/

Description

A full reverb effect based on the Freeverb algorithm. Features room size, damping, channel separation, wet/dry mix, and freeze mode. Supports multi-channel audio via the query system.

Parameters

Dynamic count (N = number of channels):

#	Name	Type	I/O	Range	Details
0..N-1	in 1/2...	ptAudio	Input	—	Audio inputs
N..2N-1	out 1/2...	ptAudio	Output	—	Audio outputs
2N	freeze	ptSwitch	Input	—	Freeze reverb tail
2N+1	room size	ptDataFader	Input	0.1 – 100%	Room size (scExp)
2N+2	damping	ptDataFader	Input	0 – 100%	High frequency damping
2N+3	channels separation	ptDataFader	Input	0 – 100%	Stereo width / channel spread
2N+4	wet level	ptGainFader	Input	—	Wet signal level (dB)
2N+5	dry level	ptGainFader	Input	—	Dry signal level (dB)

How It Works

Implements the classic Freeverb algorithm:

1. 8 comb filters in parallel per channel (with tuned delay lengths)
2. 4 allpass filters in series (for diffusion)
3. Stereo spread tuning for channel separation
4. Wet/dry mixing with smoothing for glitch-free parameter changes

Freeze Mode

When enabled, comb filter feedback is set to 1.0 and damping to 0, creating an infinite sustain.

Key Concepts Demonstrated

• Complex DSP algorithm with helper classes (Comb filter, Allpass filter)
• Audio query for dynamic multi-channel support
• createEvent/destroyEvent for temporary audio buffers
• Parameter smoothing for click-free parameter changes
• Multiple helper classes within a single module

SDK Callbacks Used

onGetModuleInfo · onGetNumberOfParams · onAfterQuery · onInitModule · onGetParamInfo · onCallBack · onProcess

Related Examples

• Granulator — Another complex audio processor
• AudioVolume — Simpler audio processing
• RingMod — Multi-channel audio effect

SDK Reference

• UserModuleBase Class
• UsineEventClass
• Module Architecture