Veer

One sweep through every shape.

Resonant multimode filter that morphs continuously from low-pass through band-pass and high-pass to notch, with input drive and an envelope that sweeps the cutoff with the playing.

● Freeorg.sournd.filter.veer

Hear it

The real engine runs in your browser. Try the test sounds, your own file or a microphone, move the parameters or press Randomise, and switch bypass to compare.

Details

Engine id: org.sournd.filter.veer
Category: Filter
Type: Multimode, low pass
Licence: Free (Apache-2.0)
Version: 1.0.0
Parameters: 7
Latency: none
Tail: 0.5 s
Sidechain input: no
Channels: mono or stereo

Parameters

The id is the C ABI parameter id and the JUCE parameter id (as a decimal string).

Id	Key	Name	Min	Max	Default	Unit	Taper
0	`cutoff_hz`	Cutoff	20	20000	1200	Hz	log
1	`resonance_pct`	Resonance	0	100	25	%	linear
2	`morph`	Morph	0	3	0	-	linear
3	`drive_db`	Drive	0	24	0	dB	linear
4	`env_amount_oct`	Envelope amount	-4	4	0	oct	linear
5	`env_release_ms`	Envelope release	10	2000	150	ms	log
6	`mix`	Mix	0	100	100	%	linear

How it is made

Original sOURnd design blending general techniques: trapezoidal zero-delay-feedback state-variable filter, crossfaded mode outputs, hyperbolic-tangent input drive, envelope-follower cutoff modulation in octaves.

CMake

cmake

juce_add_module(path/to/sournd_engine)
target_include_directories(MyPlugin PRIVATE path/to/include)
target_link_libraries(MyPlugin PRIVATE sournd_engine path/to/libsournd_cabi.a)

Three lines. Full steps: JUCE quick start.

C++ (JUCE)

cpp

#include <sournd_engine/sournd_engine.h>

sournd::SourndEngine engine { "org.sournd.filter.veer" };
juce::AudioProcessorValueTreeState parameters { *this, nullptr, "Parameters",
    sournd::SourndEngineParameters::createLayout (engine) };
sournd::SourndEngineParameters bridge { engine, parameters };

// prepareToPlay
engine.prepare ({ sampleRate, (juce::uint32) maximumBlock, 2 });
bridge.prepare (sampleRate);
setLatencySamples ((int) engine.latency());

// processBlock
bridge.apply ((uint32_t) buffer.getNumSamples());
juce::dsp::AudioBlock<float> block { buffer };
engine.process (juce::dsp::ProcessContextReplacing<float> { block });

// get/setStateInformation: hold getCallbackLock() around saveState / loadState,
// so state work never overlaps processBlock (full example: /docs/juce/)

Plain C

sournd_engine *e = NULL;
if (sournd_engine_create("org.sournd.filter.veer", &e) == SOURND_OK) {
    sournd_engine_prepare(e, 48000.0, 512);
    sournd_engine_set_param(e, 0, 1200); /* Cutoff */
    sournd_engine_process(e, in, out, 2, frames);
    sournd_engine_destroy(e);
}

Ask your AI

Paste this into your coding assistant:

Prompt

Add the sournd engine org.sournd.filter.veer to my JUCE plugin. Follow https://sournd.com/docs/juce/index.md
and the engine reference at https://sournd.com/engines/veer/index.md. Expose every parameter through APVTS.