Lucento

Every repeat, exactly.

Clean digital echo: every repeat an exact copy, trimmed by low and high cut in the loop. Set the time in milliseconds or lock it to a note of the host tempo (the Tempo control stands in without one). Changing the time crossfades to the new echo instead of bending its pitch. Offset delays the right side for width. Sync: 0 = free, 1 = 1/32, 2 = 1/16T, 3 = 1/16, 4 = 1/16D, 5 = 1/8T, 6 = 1/8, 7 = 1/8D, 8 = 1/4T, 9 = 1/4, 10 = 1/4D, 11 = 1/2, 12 = 1/2D, 13 = 1 bar.

● Freeorg.sournd.delay.lucento

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.delay.lucento
Category: Delay
Type: Digital
Licence: Free (Apache-2.0)
Version: 1.0.0
Parameters: 8
Latency: none
Tail: 60 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	`time_ms`	Time	1	4000	375	ms	log
1	`sync`	Sync	0	13	0	-	linear
2	`feedback`	Feedback	0	0.98	0.4	-	linear
3	`low_cut_hz`	Low cut	20	2000	40	Hz	log
4	`high_cut_hz`	High cut	1000	20000	12000	Hz	log
5	`offset_ms`	Offset	0	100	0	ms	linear
6	`tempo`	Tempo	40	300	120	bpm	linear
7	`mix`	Mix	0	100	30	%	linear

How it is made

Original sOURnd design: a linear-interpolated delay line per channel read by a crossfading tap (equal-power switch between old and new read points on any time change), 12 dB/oct high-pass and low-pass inside the feedback loop, tempo-derived note times and a fixed right-channel offset.

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.delay.lucento" };
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.delay.lucento", &e) == SOURND_OK) {
    sournd_engine_prepare(e, 48000.0, 512);
    sournd_engine_set_param(e, 0, 375); /* Time */
    sournd_engine_process(e, in, out, 2, frames);
    sournd_engine_destroy(e);
}

Ask your AI

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Prompt

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