Can't modulate `Vib LFO freq` slowly - Githubissues

FluidSynth / fluidsynth

Software synthesizer based on the SoundFont 2 specifications

https://www.fluidsynth.org

GNU Lesser General Public License v2.1

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Can't modulate `Vib LFO freq` slowly #1310

Closed yukulele closed 3 months ago

yukulele commented 6 months ago

FluidSynth version

FluidSynth runtime version 2.2.5 Copyright (C) 2000-2024 Peter Hanappe and others. Distributed under the LGPL license. SoundFont(R) is a registered trademark of Creative Technology Ltd.

FluidSynth executable version 2.3.5 Sample type=double

Describe the bug

I have a sf2 file with a modulator CC-01 Modulation wheel to Vib LFO freq.

When I slowly modulate CC-01 from 0 to 127 LFO seem to be stopped

Expected behavior

The LFO should gradually become faster and faster. (as Polyphone does)

Steps to reproduce

open sample-LFO-freq.sf2 with fluidsynth
start playing a note
slowly vary the modulation wheel from 0 to 127

derselbst commented 3 months ago

Works fine in fluidsynth 2.3.5

> noteon 0 60 126
> cc 0 1 0
> cc 0 1 10
> cc 0 1 20
> cc 0 1 30
> cc 0 1 40
> cc 0 1 50