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Re: [fluid-dev] some notes of Cadenza.sf2 don't sound right
From: |
Mihail Zenkov |
Subject: |
Re: [fluid-dev] some notes of Cadenza.sf2 don't sound right |
Date: |
Sat, 17 Mar 2007 18:58:59 +0200 |
> There is one issue that can still be a problem and that is that if
> FluidSynth is internally configured at a different baud rate than what
> the driver is using. This will usually be reported as a warning though
> (perhaps it should actually be a fatal error, at least until drivers can
> switch rates on the fly). That will make all the notes out of tune
> though, not just selective few.
Yes, i know about this.
> The other thing that can cause different sounding audio is with
> Instruments with more than one voice sounding at the same time.
> FluidSynth currently doesn't start all voices synchronously, so there is
> the chance that voices will get started in the next buffer fragment
> (multiple of 64 samples by default). This is also the case with stereo
> sample pairs, which is actually contrary to the SF spec. This will
> cause different sounding playback for different note on events (phasing
> effects). This might be what you are hearing, since that printf would
> cause some timing differences.
Yes, you write before about this and i have this case in swami on big
sound fonts. Almost all audio apps interleave audio channels to prevent
this.
> If you discover anything else, be sure to let us know :)
Bug with wrong tune on some b and d depends from sample rate fluidsynth
and sample rate in sound font. It independent for each channels
(right/left). When i do two sf in swami with SR 44.1kHz and SR 48kHz -
i can't reproduce. But i have few big bank with this bug.
On some banks/notes i feels some strange in tune - note fall form
overall order. Not sure if it bug in bank or in fluidsynth and not sure
what i hear, i just feels it sometime :)
What about 'internal clipping', how can i reproduce this?
Re: [fluid-dev] some notes of Cadenza.sf2 don't sound right, Wolfgang Illmeyer, 2007/03/17