Re: [fluid-dev] FS produces unbearably loud noise when playing most instruments, any soundfont

[kd4crel02]

Thanks for the suggestion, Markus. I tried that, this time using the 
fluidsynth CVS sources, but the problem still persists. And it happens on 
both kernels 2.4.27 and 2.6.10, either as root or a regular user.

I tried the file audio output driver to make sure it was not a hardware 
problem, and sure enough, the insane noise was written to the output file. I 
converted it to a WAV, OGG and MP3 so you can hear exactly what I'm talking 
about. You can download them here: (turn down the volume first!)

http://............./fluidsynth-bug/fluidsynth.wav (1.5 MB)
http://............./fluidsynth-bug/fluidsynth.ogg (119 KB)
http://............./fluidsynth-bug/fluidsynth.mp3 (137 KB)

I've also uploaded the soundfont that I used to produce that particular sound, 
as well as the FluidGUI configuration file:

http://............./fluidsynth-bug/8mbgmgs.sf2 (7.9 MB)
http://............./fluidsynth-bug/fluidsynth.fsg

To produce that, I simply plonked down a random chord near middle C using the 
Electric Grand instrument in bank 0.

Normally I'd be looking at the source code myself and seeing if I could figure 
out this weird bug, but I don't know anything about audio or DSP programming 
and I don't think I have time to learn that right now. :(

Paul

On Thursday 13 January 2005 00:49, you wrote:
> Hello,
>
> try this:
> -- delete all fluidsynth related libraries from /usr/lib *AND!!!*
> /usr/local/lib -- move your old source aside, unpack the tar file anew and
> recompile from scratch.
>
> I've never seen this problem, but I've seen lots of bizarre glitches caused
> by an obsolete fluidsynth library.
>
> -Markus
>
> > -----Original Message-----
> > From: address@hidden
> > [mailto:address@hidden
> > Behalf Of ext address@hidden
> > Sent: 13 January, 2005 07:26
> > To: address@hidden
> > Subject: [fluid-dev] FS produces unbearably loud noise when
> > playing most
> > instruments, any soundfont
> >
> >
> > Hi!
> >
> >
> >
> > Recently I got a MIDI interface and a keyboard, and I'm
> > trying them out with FluidSynth to render the MIDI. For most
> > soundfonts I've tried, the first piano instrument (bank 1,
> > program 1) works fine. But when I try almost any other
> > instrument and play a few notes, FluidSynth ends up producing
> > a horrendously loud noise! The only way I can stop it is by
> > changing to a new instrument. It's very weird.
> >
> >
> >
> > It seems to happen most easily with instruments that don't
> > naturally fade out when you hold them down, such as organs,
> > accordions, cellos, and so on. I have one soundfont in which
> > this happens for the first piano too, but for most soundfonts
> > I can play the first piano without this bizarre behaviour.
> >
> >
> >
> > As I said, I tried various soundfonts, and I haven't found
> > one yet in which this doesn't happen. I tried fiddling around
> > with FluidSynth's various audio and synth settings, but it
> > made no difference. So it doesn't seem have to do with
> > chorus, reverb, buffers, periods and so on. I even tried
> > different audio output drivers, including oss, alsa, and
> > jack, but the behaviour was the same.
> >
> >
> >
> > The funny thing is, I don't remember this ever happening last
> > year when I was using FluidSynth just to play MIDI files. It
> > seemed to work like a charm back then - this noise thing
> > never happened. But then I didn't have a MIDI keyboard hooked
> > up, although I don't see how that could possibly make any
> > difference with the sound synthesis.
> >
> >
> >
> > Another thing that's different, however, is that I'm using
> > kernel 2.6.10 now. Last time I used FluidSynth I was running
> > kernel 2.4.26 or .27. Maybe something's changed between
> > versions that's causing this weird thing to happen?
> >
> >
> >
> > I might try recompiling FluidSynth or trying an older kernel.
> > But has anyone else experienced such a thing?
> >
> >
> >
> > Thanks,
> >
> > Paul
> >
> >
> > _______________________________________________
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