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Re: [fluid-dev] Small CPU stuttering fluidsynth

From: Pedro Lopez-Cabanillas
Subject: Re: [fluid-dev] Small CPU stuttering fluidsynth
Date: Wed, 24 Aug 2011 13:08:21 +0200
User-agent: KMail/1.13.5 (Linux/; KDE/4.4.4; i686; ; )

On Wednesday 24 August 2011, David Henningsson wrote:
> On 08/23/2011 08:28 AM, Pedro Lopez-Cabanillas wrote:
> > And finally, there are still puzzling noises appearing after releasing all 
> > notes on some sounds, that can't be silenced with 
> > fluid_synth_system_reset(), only when the program exits. I've been able to 
> > reproduce the noises consistently with the soundfont 
> > VintageDreamsWaves-v2.sf2 and the preset named "El Cheapo Organ", but this 
> > happens only with floats and not with doubles!. I will keep you posted.
> Interesting, thanks for the reports. Do you think we should delay 1.1.5 
> until the puzzling noises are sorted out?

I don't think so, I'm going to use the SVN sources anyway. My executable is 
statically linked, because FS is not available as a standalone package in the 
N950 SDK at this moment. Later, if things go well, we can try to push the 
package to the Meego repositories and release a dynamically linked bundle.

More findings about the after-release noises. They appear with floats and 
polyphony limited below the default value. When using doubles, limiting the 
polyphony to 32 causes messages like "error: Trying to exceed polyphony in 
fluid_rvoice_mixer_add_voice" and "warning: Failed to allocate a synthesis 
process", the sound is silenced but don't produce noise. With floats and the 
same polyphony limit the messages don't appear, but noise is generated and 
can't be stopped.


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