Rung

Climb into warm resonance.

Warm resonant low-pass: four cascaded poles in a feedback loop with soft saturation, a slope control from 6 to 24 dB/oct and bass compensation for the level lost to resonance.

◆ Paidorg.sournd.filter.rung

Hear it

Every parameter plays here, rendered on our server. Pick a test sound or your own file, move the dials or press Randomise, and switch bypass to compare.

Details

Engine id: org.sournd.filter.rung
Category: Filter
Type: Low pass
Licence: £2.99 once, or in the subscription
Version: 1.0.0
Parameters: 6
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	900	Hz	log
1	`resonance_pct`	Resonance	0	100	30	%	linear
2	`drive_db`	Drive	0	24	0	dB	linear
3	`poles`	Slope	1	4	4	poles	linear
4	`bass_comp_pct`	Bass compensation	0	100	50	%	linear
5	`output_db`	Output	-18	18	0	dB	linear

How it is made

Original sOURnd design blending general techniques: cascaded trapezoidal one-pole sections with global negative feedback solved instantaneously, hyperbolic-tangent loop saturation, tap blending for variable slope, passband gain compensation.

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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.rung" };
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.rung", &e) == SOURND_OK) {
    sournd_engine_prepare(e, 48000.0, 512);
    sournd_engine_set_param(e, 0, 900); /* 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.rung to my JUCE plugin. Follow https://sournd.com/docs/juce/index.md
and the engine reference at https://sournd.com/engines/rung/index.md. Expose every parameter through APVTS.