On Sun, Nov 13, 2011 at 10:00 PM, XeCycle <xecycle@xxxxxxxxx> wrote: > Hi, I'm using the latest kernel from [core] (linux 3.1-4), and > experienced a terrible delay of software MIDI synthesizers. > > I'm using fluidsynth, using ALSA as the output driver (I simply can't > get jack working), and VMPK as a keyboard MIDI event generator. The > delay used to be fine, but with the latest kernel, it's longer than 0.5 > secs --- that's unusable. I believe this should be kernel-related, > could you please suggest some solutions or workarounds? Some more data would be needed. I suggest trying out latencytop. And also checking if for dev in /proc/asound/card*/pcm*/sub*/prealloc; do echo 64 > $dev done solves the problem. I think the first step should be to figure out why Jack does not work, that's supposed to deal with low-latency situations, so using ALSA directly might not have been tested very much for this use.
