Julien Claassen <julien@email-addr-hidden-lab.de> writes:
> Hi everyone!
> (this was first posted on Linux-Audio-Users, but is probably really more
> suited to this list.)
> I just compiled a sound generator, which can be controlled vai MIDI, it uses
> simpe raw-midi and jack as output, via bio2jack.
> Now I have horrible latency 0.2-0.5sec (rough estimate). Where should I start
> looking in my setupt. I know others had the software running without problems.
> Sorry for being so abstract, but I'm not allowed to mention the software. :-(
> I already tried setting internal audio-buffer to 128 samples and reducing
> message queues for the tonegenerator and MIDI. Still it's much too much
> latency. Does bio2jack have some settings for reducing latency? Does bio2jack
> do samplerate conversion, is it costly? The sound-engines samplerate is set to
> 44100 or 22050 and my JACKd runs at 48000.
>
> But I could post parts of the source if necessary.
> My setup is:
> Debian Lenny with custom built kernel 2.6.24-rt1
> JACK subversion 0.109.0
> jack-commandline:
> jackd --timeout 4500 -R -d alsa -d hw:1 -r 48000 -p 128 -H -M -z shaped
> ALSA version 1.0.15
> Any idea where to optimise?
> Kindest regards
> Julien
Realtime addicted people tend to use JACK with realtime kernel and JACK
MIDI ;) No bio2jack eresy :P
-- Nedko Arnaudov <GnuPG KeyID: DE1716B0>
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