[linux-audio-dev] JACK data transfers

Steve Harris steve at plugin.org.uk
Wed Jan 24 18:00:19 UTC 2007

On 24 Jan 2007, at 16:02, Stefano D'Angelo wrote:

> Well... I know I'm quite a boring person, but I need some informations
> for my project and so I'm going to stress you a bit ;-)
> I'm wondering if JACK is suitable to transfer non-audio data beetween
> applications (my particular case is to transfer control data to
> processing plugins). Is that "naturally" possible, is it an hack or is
> it impossible at all?

You could encode control data in the audio stream, or build a bespoke  
JACK that add additional data types, or you could use the nascent  
JACK-MIDI stuff.

You could also look at OSC, which, depending on your syncronisation  
needs could be a better fit.

> And another thing (I'm too lazy to check it out myself :-P): does jack
> transfers data by copying or uses something like shared memory or
> whatever?

It uses shared memory where possible.

- Steve

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