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Bellacaprino

I’m running RNBO on a Raspberry Pi 4 and trying to get clean audio output through the headphone jack. I’ve followed the setup guide, and I can now load patches through the RNBO Runner Panel in the browser.

However, when I run a simple sine wave patch from RNBO, the output sounds aliasy and distorted — as if the sample rate is incorrect or the waveform is being bitcrushed. However, other system audio (like 

) sounds perfectly clean. I've triple checked the export bit rate, sample rate, bit depth, within the export settings of RNBO and all seems correct.

Weirdly if I launch JACK manually via terminal with:

jackd -R -dalsa -dhw:1 -r44100 -p1024 -n3

...the sine wave sounds cleaner (though still slightly imperfect), but then I lose control from the RNBO Runner Panel.

Any idea what might be going on? How can I get clean output from RNBO?

Hi,

I’m running RNBO on a Raspberry Pi 4 and trying to get clean audio output through the headphone jack. I’ve followed the setup guide,...

distorted-audio-from-rnbo-patch-on-raspberry-pi-4-via-headphone-jack

Distorted Audio from RNBO Patch on Raspberry Pi 4 via Headphone Jack

Jaeho Chang

The patch file I’ve attached demonstrates how to use RNBO’s codebox~ to implement a so-called "non-standard" synthesis algorithm. I’d like to share it with the members of this community.

In this example, when you draw lines on the v8ui canvas in Max, RNBO generates audio samples based on the lines' y-values. The core algorithm is quite simple, but the code may appear complex due to additional elements like the user interface and the data handling between v8ui and the RNBO codebox objects.

This patch requires Max version 9 or later.

The patch file I’ve attached demonstrates how to use RNBO’s codebox~ to implement a so-called "non-standard" synthesis algorithm. I’d like...

synth-with-lines-an-rnbo-codebox-example

Synth with Lines : an RNBO codebox example

Eric Sterling

Any idea what would cause this error when loading an RNBO patch?

the same gen object works fine in a Max/MSP patch

RNBO: parse failed peg$SyntaxError: Expected "!=", "!=p", "&&", "(", ",", ".", ";", "<<", "<=", "<=p", "<p", "=", "==", "==p", ">=", ">=p", ">>", ">p", "?", "[", "^^", "||", [\-*+/%], or [\-/+*%\^&|<>] but "d" found.

RNBO:     at peg$buildStructuredError (eval at compile (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\pegjs\lib\compiler\index.js:67:29), <anonymous>:795:14)

RNBO:     at Object.peg$parse [as parse] (eval at compile (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\pegjs\lib\compiler\index.js:67:29), <anonymous>:5369:13)

RNBO:     at Object.parse (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\@rnbo\genexpr_js\genbo.js:1335:16)

RNBO:     at gen.finalize (C:/Program Files/Cycling '74/Max 9/resources/packages/RNBO/server/node_modules/@rnbo/xam/objects/gen.js:102:18)

RNBO:     at new XAMObject (C:/Program Files/Cycling '74/Max 9/resources/packages/RNBO/server/node_modules/@rnbo/xam/objects/XAMObjectAndDecorators.js:18:27)

RNBO:     at new gen (C:/Program Files/Cycling '74/Max 9/resources/packages/RNBO/server/node_modules/@rnbo/xam/objects/gen.js:24:1)

RNBO:     at loggedInstance (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\@rnbo\xam\index.js:39:17)

RNBO:     at createObjectInternal (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\nodemodules\@rnbo\xam\index.js:778:10)

RNBO:     at Object.XAMCreateObject [as createObject] (C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\@rnbo\xam\index.js:799:9)

RNBO:     at C:\Program Files\Cycling '74\Max 9\resources\packages\RNBO\server\node_modules\@rnbo\xam-runner\lib\patcher.js:225:33 {

Any idea what would cause this error when loading an RNBO patch?

the same gen object works fine in a Max/MSP patch

RNBO: parse failed...

gen-object-compiles-in-max-but-not-in-rnbo

gen object compiles in Max but not in RNBO

In RNBO codebox~, passing a buffer or data to a function as its argument causes a compile error.

const bufferSize = 1024;

@state buffer0 = new data(bufferSize);
@state buffer1 = new data(bufferSize);

process(buffer0);
process(buffer1);

function process(_buffer) {
	let v = random(-1, 1);
	let i = floor(random(bufferSize));
	poke(_buffer, v, i);
}

In RNBO codebox~, passing a buffer or data to a function as its argument causes a compile error.

For example :

const bufferSize =...

rnbo-codebox-passing-a-buffer-or-data-to-a-function

RNBO codebox~ : passing a buffer or data to a function

Joop de Hoop

Beginner over here. I'm trying to make a polyphonic gater which I want to export to an AU plugin to use in Logic Pro. 

I want the chord input I'm sending on one MIDI channel to gate from a gate signal I'm sending on another MIDI channel. Like you would do with an analog synth via cv and gate.

I have it working in MONO mode but when I try to convert it to a polyphonic patcher it gets problems or no signal at all. 

When I give the rnbo~ itself the @polyphony attribute it doesn't past midi signal at all. When I make a subpatcher within the rnbo~ with @polyphony it gets MIDI signal through but starts to act weird or doesn't work.

Can someone help me get it working in polyphonic mode?

Hi,

Beginner over here. I'm trying to make a polyphonic gater which I want to export to an AU plugin to use in Logic Pro. 

I want the...

polyphonic-gater

Polyphonic gater

Thomas Peters

I created a Max patch for a sound installation that made a functioning timepiece using the cpuclock object. I want to create a similar patch in RNBO that can operate on a Raspberry Pi that has a clock module installed, but to my knowledge there is no equivalent to the cpuclock object. 

Is there a way to bring the RP's CPU clock data into RNBO?

Bringing Raspberry Pi CPU Clock Data into RNBO

bringing-raspberry-pi-cpu-clock-data-into-rnbo

Alessandro Gaiba

I post this here because (yep) I'm proud of my first audio plugin, made with RNBO and JUCE, but also because, when I started, I struggled with documentation and finding examples for what I needed. Since it's all open source and available on GitHub, maybe it can be useful to someone.

https://github.com/glesdora/boris-granular-station

This is not only my first RNBO project, it's also my first C++ application, so I can't guarantee things are done the standard or the elegant way, but it does what expected and it does it quite smoothly.

The plugin is a live-input granulator. The granular engine is designed to be truly realtime: grains can begin playback as soon as the first input samples arrive, without waiting for a complete segment of audio. A margin is calculated dynamically in case of playback speed (pitch shift) > 1.

Also, start time, duration, and playback are accurate down to the single sample, ensuring clean, phase-coherent output. When used transparently, with no elaboration applied to the grains (except for envelope), the output resembles the source.

The dsp code can be found in /dsp/Granulator.cpp. It's being realized using code generated with RNBO as a basis, and still partially relies on the RNBO api. It's cleaner, more human readable and (much) more efficient, but the main structure is still there.

I'm happy to answer to doubts, take feedbacks and fix bugs :)

BORIS: a live-input granular plugin with RNBO and JUCE

boris-a-live-input-granular-plugin-with-rnbo-and-juce

It seems that the bufferresize function in RNBO codebox~ does not handle cases where the size is 0 correctly. For example, resizing a buffer or data from size 0 to 1024, or from 1024 to 0, does not work in either case.

bufferresize function issue with zero size buffer or data

bufferresize-function-issue-with-zero-sized-buffer-or-data

Henrique Lorentz

Hello everyone! I'm using RNBO to develop a delay effect with C++ export and JUCE. It works perfectly as standalone and in Ableton, but different testers on FL Studio have shown me that there's a lot of noise when turning the feedback up. I found an old post on this forum mentioning the same issue, with no fix. I attached a video from a tester.

Hello everyone! I'm using RNBO to develop a delay effect with C++ export and JUCE. It works perfectly as standalone and in Ableton, but...

RNBO Forum