On Thu, 2005-10-13 at 18:36 +0300, Kimmo Sundqvist wrote: > Toby wrote: > > > Can you investigate further? > > I installed 1.0.5 and played Overture to a New World by Chris Tilton. The > problem is repeatable, not dependent on the used soundfont (tried Unison and > Merlin 22MB, and experienced it with both) or system load patterns. > > The CPU usage, as shown by top, is 99% all the time, music or not, soundfont > loaded or not, and I experienced no skipping. > > I did not experience Fluidsynth going totally berserk, but it segfaulted once > when I killed pmidi. > > The screech comes at certain points in the song. Imagine a wave hitting a > rocky shore, but instead of water swooshing, imagine a sound much like a > broken MP3 (with continuous CRC errors, with blips indistinguishable from > each other, but no skips). That is exactly how it sounds in the Overture. > The envelope of the noise rises and decays exactly like a wave hitting a > shore. > > And it is not mathematical random noise, like one gets with > > cat /dev/urandom > /dev/dsp > > My ALSA is 1.0.9 > > Is it possible that there is a subformat of .sf2 or a format of compressed > samples that Fluidsynth doesn't support? This would be an odd coincidence, > because changing the soundfont didn't change the noise in any way. > > Playing a midi file with no soundfont loaded results in total silence. Again > Fluidsynth takes 99% of a CPU, but no noise (and no music) comes out. > > -Kimmo S. >
The rest of your problems are likely related to the 100% CPU usage.
This is not normal behavior for FluidSynth. Have you tried building
from a tarball with just the default settings (don't enable anything
fancy)? Best regards,
Josh Green
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