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[fluid-dev] Re: An evil screeching noise when playing
From: |
Kimmo Sundqvist |
Subject: |
[fluid-dev] Re: An evil screeching noise when playing |
Date: |
Sat, 15 Oct 2005 11:51:40 +0300 |
User-agent: |
KMail/1.8.1 |
On Thursday 13 October 2005 23:53, you wrote:
> 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)?
I don't know how familiar you are with Gentoo linux's build system, Portage.
It resembles the ports system of FreeBSD a bit.
So, I can type "emerge fluidsynth" and it will build Fluidsynth and all that
it requires. Fluidsynth 1.0.6 knows four USE variables that I can set either
globally or in a per-package fashion. Those are ALSA, Jack, SSE and Ladcca.
Ladspa is, AFAIK. always enabled, and that is the decision of the Fluidsynth
packager for Gentoo.
I had it build 1.0.6 with Jack, SSE and Ladcca disabled, and the screeches
were there no more. Using Unison.sf2 I can listen to music quite fine.
Except that the CPU usage goes to 99% immediately after starting Fluisynth,
even with no soundfont loaded. Yet I experience no skipping in the sound,
unless I try to read a defective CD at the same time.
Using the 22MB Merlin soundfont, the relative volumes of instruments are
messed up, or some channels do not come through. I don't know what causes
the problem, but the soundfont works ok with Timidity.
As soon as I have time, I will narrow the problem down to one USE variable. I
remember doing this before, but couldn't remove the screech no matter what I
disabled. I don't know what has changed since then.
-Kimmo S.