On Thu, 17 Sep 2009 19:17:26 +0100 andy baxter <andy@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Clemens Ladisch wrote: > > andy baxter wrote: > > > >> when I play notes on the keyboard into fluidsynth, the notes are > >> slightly delayed. The delay is small (around 0.1s ?) but enough to > >> be annoying. > >> > > > > Is the delay constant or random? > > > > If you monitor the keyboard's output with aseqdump at the same > > time, do you see the same delay when the notes are printed? > > > > > > Best regards, > > Clemens > > > > > The delay is variable - sometimes the note will sound almost > immediately, but usually there is a slight delay. > > I've tried with aseqdump, and as far as I can tell there is no delay > - 'note on' seems to appear at the same moment that I press the key. > > I've also tried using zynaddsubfx instead of qsynth / fluidsynth, and > the delay is still there. > > Which seems odd - I would have expected that if aseqdump was not > showing a delay then the problem must be with qsynth. Maybe there's > some library or code snippet that zyn and qsynth both share? > > I'm wondering if it would help to install the whole of ubuntu hardy > on my new laptop and see if that cures the problem (that's what my > old laptop is running, which works fine.) > > andy I don't remember whether you said if it's the same with a sequencer. I just thought I could point you to a little app that shows midi jitter. With that you could play some monotonous repetitive stuff from a sequencer and see if there are huge delays or breakouts. The test, originally to test the sequencers, is described here: http://tapas.affenbande.org/wordpress/?page_id=56 The app midi_timer-1.tgz can be found on this page: http://tapas.affenbande.org/wordpress/?page_id=40 the delta-thingy might be most useful. Philipp _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
