[fluid-dev] Re: Re : Re: Re : no effects applied using multiple stereo channels

[Tom M.]

2015-04-09 18:45 GMT+02:00 CERESA Jean-Jacques ENAC/ENAC
<address@hidden>:
> There is no doubts that this number N need be coherent with the specifics
> settings discuted in (1). Particulary if N=3 and the oudio card have only 1
> output, it is normal that some audio voices produced by the mixer will be
> never heared !

That's why I mapped the 3 stereo-outputs via jack to my single stereo
soundcard. I heard all voices, except for the reverb.


> This driver must able to handle the intended audio card.
> with multiple audio outputs. This means that this driver need to be
> instructed (with the help of specifics "settings").

So to avoid a wrong soundcard-driver-configuration I started jack in
dummy mode with 6 capturing and 6 playback channels:

jackd -r -d dummy -C 6 -P 6


followed by starting fluidsynth:

fluidsynth -a jack -L 3 my.sf2


and then capturing the output of fluidsynth. All midi channels were
clearly hearable, again, reverb was missing.

Restarting fluidsynth changing -L to 1 and reverb works fine again.
Note that I didn't changed jack in any way.


Another thing that strikes me: There is an option called
audio.jack.multi. The documentation says:

"If 'yes' then create separate output ports for reverb and chorus effects."

However, if I set this to yes only 1 stereo output channel is created
by fluidsynth, no matter how many I specify.



Tom