Julien Claassen <[EMAIL PROTECTED]> 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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