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Re: [fluid-dev] fluidsynth tremolo (modulation)

From: Tom M.
Subject: Re: [fluid-dev] fluidsynth tremolo (modulation)
Date: Thu, 02 Jul 2020 18:14:33 +0200

The soundfont spec defines a default modulator for CC1. That means a value of 
127 will result in a vibrato effect of +-50cents (not to be confused with 

This default modulator is implemented in fluidsynth, see this chart: 

I've just verified its correct behaviour using fluidsynth 2.1.3.

If the effect does not work for you, that default modulator may have been 
overridden by the soundfont you are using. It may also be that the delayVibLFO 
and freqVibLFO initial generators have been modified to cancel out any vibrato 
effect for whatever instrument you've tested with. You'll need to check that 
with a soundfont editor.


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