Carvello

Every bar, sliced and shuffled.

Beat slicer: each bar is cut into equal slices, and Shuffle is the chance that a slice is replaced by an earlier slice of the same bar (Reverse the chance it plays backwards), so loops are broken up and rebuilt on the fly. Hold keeps one pattern for every bar (above half) instead of a new one each bar. Slices: 0 = 4, 1 = 8, 2 = 16, 3 = 32 per bar. Seed picks the pattern.

◆ Paidorg.sournd.performance.carvello

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.performance.carvello
Category: Performance
Type: Slicer
Licence: £2.99 once, or in the subscription
Version: 1.0.0
Parameters: 7
Latency: none
Tail: 6.5 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	`slices`	Slices	0	3	2	-	linear
1	`shuffle`	Shuffle	0	100	50	%	linear
2	`reverse`	Reverse	0	100	0	%	linear
3	`hold`	Hold	0	1	0	-	linear
4	`seed`	Seed	1	64	1	-	linear
5	`tempo`	Tempo	40	300	120	bpm	linear
6	`mix`	Mix	0	100	100	%	linear

How it is made

Original sOURnd design: bar-locked recording into preallocated memory from the musical clock, per-slice decisions from a seeded hash of the slice and bar indices (source restricted to already-recorded slices, so no latency is needed), forward or reversed reads with raised-sine slice edges crossfaded against the live signal.

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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.performance.carvello" };
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.performance.carvello", &e) == SOURND_OK) {
    sournd_engine_prepare(e, 48000.0, 512);
    sournd_engine_set_param(e, 0, 2); /* Slices */
    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.performance.carvello to my JUCE plugin. Follow https://sournd.com/docs/juce/index.md
and the engine reference at https://sournd.com/engines/carvello/index.md. Expose every parameter through APVTS.