I find halving the sample rate works a treat on NetBooks as this reduces the work load but it also has the side effect of doubling the latency. the -r 22050 only seems to work with the plughw:0 as the default alsa device does not accept the reduced sample rate.
Below is the command line that I use and it works on Ubuntu Karmic tested at running at reduced power at 800Mhz. fluidsynth -C 0 -R 0 -c 6 -z 128 -r 22050 -l -a alsa -o audio.alsa.device=plughw:0 -o midi.alsa_seq.id=fs /usr/share/sounds/sf2/FluidR3_GM.sf2 /usr/share/sounds/sf2/FluidR3_GS.sf2 This gives a latency of delay of NUM * SIZE / RATE 6 * 128 / 22050 = 35 msec Louis On Sun, Nov 1, 2009 at 9:30 PM, Joshua Higgins <[email protected]> wrote: > I'm using fluidsynth 1.0.9 (packaged with karmic) on an old lifebook > b-series laptop. I have a very large Studiologic SL-880 midi controller, so > i'm intergrating this laptop into the body of the keyboard, using fluidsynth > for sound. > The PC is low spec: 500mhz with 192mb ram. I've bootstrapped Ubuntu Karmic > on a 4gb CF card which fluidsynth is running off. Its using the realtime > kernel, with jackd running with the --realtime parameter. > > For normal playing, the performance is excellent. Jack seems to be stable, > running with 512 frames and 2 periods yeilding a latency of 10.7ms. > > However, if I press down lots of keys simulatenously, i.e. more than 3 > octaves at once, the audio stops straight away with the error message on the > console: > > > subgraph starting at fluidsynth timed out (subgraph_wait_fd=9, status = 0, > state = Running, pollret = 0 revents = 0x0) > bad status (1) for client fluidsynth handing event (type = 8) > > > The strange thing is that both the jack server and fluidsynth are still > running, just audio processing has stopped. > > Can anyone shed any light on the situation? Is this computer just too slow? > > Thanks. > -- > joshua higgins >>>>>>>------ > > _______________________________________________ > fluid-dev mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/fluid-dev > > _______________________________________________ fluid-dev mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/fluid-dev
