Re: [fluid-dev] JACK connection problems with fluidsynth

[David Henningsson]

On 2011-05-18 00:29, Shamus wrote:
> Hello everyone,
>
> There was a problem with fluidsynth kicking out JACK on startup, which
> was addressed with a patch as shown in the archives:
>
> http://lists.nongnu.org/archive/html/fluid-dev/2011-02/msg00012.html
>
> While this patch does indeed solve the problem of kicking out on
> startup, there are at least two more places where this occurs (and there
> may be others; I haven't done any exhaustive testing in that regard).
> The first occurs when you reset fluidsynth; apparently it takes a
> different path than the files that the patch touched. The same goes for
> libfluidsynth: qsynth built from a patched fluidsynth displays the same
> behaviors as an unpatched fluidsynth.
>
> How to fix this is beyond me, I deal with microprocessor emulation, not
> realtime audio. :-) However, I would be willing and able to test any
> patches you care to send my way. ;-)
>
> Warmest regards,
>
> Shamus

Hi Shamus,

Being kicked out by Jack is essentially an optimization problem; Jack 
kicks Fluidsynth out if it does not respond in time. I think this 
timeout is configurable. Could it be that you're on the edge and just 
need to adjust the timeout up a little bit, or increase the latency? In 
general, it doesn't make sense that libfluidsynth would behave different 
than the fluidsynth executable since the executable is just a wrapper 
around libfluidsynth.

Also, are you using Jack for MIDI as well as audio, or do you use Jack 
audio + alsa MIDI?

// David