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Re: [fluid-dev] audio processing stops on ubuntu karmic

From: Louis B.
Subject: Re: [fluid-dev] audio processing stops on ubuntu karmic
Date: Mon, 2 Nov 2009 23:06:07 +0000

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

This gives a latency of delay of NUM * SIZE / RATE 6 * 128 / 22050 = 35 msec


On Sun, Nov 1, 2009 at 9:30 PM, Joshua Higgins
<address@hidden> 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
> address@hidden
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