Lancetine

Every facet, cut exactly.

Surgical parametric EQ: 24 dB/oct low and high cuts (off at their extremes), low and high shelves and three fully parametric bells.

● Freeorg.sournd.eq.lancetine

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.eq.lancetine
Category: EQ
Type: Parametric, shelf
Licence: Free (Apache-2.0)
Version: 1.0.0
Parameters: 16
Latency: none
Tail: 0.2 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	`low_cut_hz`	Low cut	10	2000	10	Hz	log
1	`low_shelf_hz`	Low shelf freq	20	1000	100	Hz	log
2	`low_shelf_db`	Low shelf gain	-18	24	0	dB	linear
3	`bell1_hz`	Bell 1 freq	20	20000	250	Hz	log
4	`bell1_gain_db`	Bell 1 gain	-36	24	0	dB	linear
5	`bell1_q`	Bell 1 Q	0.1	18	1	x	log
6	`bell2_hz`	Bell 2 freq	20	20000	1000	Hz	log
7	`bell2_gain_db`	Bell 2 gain	-36	24	0	dB	linear
8	`bell2_q`	Bell 2 Q	0.1	18	1	x	log
9	`bell3_hz`	Bell 3 freq	20	20000	4000	Hz	log
10	`bell3_gain_db`	Bell 3 gain	-36	24	0	dB	linear
11	`bell3_q`	Bell 3 Q	0.1	18	1	x	log
12	`high_shelf_hz`	High shelf freq	1000	20000	8000	Hz	log
13	`high_shelf_db`	High shelf gain	-18	24	0	dB	linear
14	`high_cut_hz`	High cut	1000	22000	22000	Hz	log
15	`output_db`	Output	-18	18	0	dB	linear

How it is made

Original sOURnd design blending general techniques: RBJ cookbook peaking and shelving biquads, cascaded Butterworth high- and low-pass sections, control-rate coefficient updates.

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.eq.lancetine" };
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.eq.lancetine", &e) == SOURND_OK) {
    sournd_engine_prepare(e, 48000.0, 512);
    sournd_engine_set_param(e, 0, 10); /* Low cut */
    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.eq.lancetine to my JUCE plugin. Follow https://sournd.com/docs/juce/index.md
and the engine reference at https://sournd.com/engines/lancetine/index.md. Expose every parameter through APVTS.