setting a low polyphony limit produces FPE exceptions

[derselbst]

Current SVN trunk, build configuration:

cmake -DCMAKE_BUILD_TYPE=Debug -Denable-debug=on-Denable-floats=on -Denable-fpe-check=on

Program arguments:

fluidsynth -m alsa_seq \

-a pulseaudio \
-C 0 \
-R 0 \
-o synth.polyphony=32 \
/usr/share/sounds/sf2/Vintage_Dreams_Waves_v2.sf2

Program output:

FluidSynth version 1.1.4
Copyright (C) 2000-2011 Peter Hanappe and others.
Distributed under the LGPL license.
SoundFont(R) is a registered trademark of E-mu Systems, Inc.

fluidsynth: warning: Failed to pin the sample data to RAM; swapping is possible.
fluidsynth: warning: Ignoring sample SineWave: can't use ROM samples
fluidsynth: debug: Using 'pulseaudio' audio driver
fluidsynth: Using PulseAudio driver
fluidsynth: debug: Using 'alsa_seq' midi driver
Type 'help' for help topics.

fluidsynth: debug: Polyphony exceeded, trying to kill a voice

fluidsynth: debug: Killing voice 3, index 6, chan 0, key 74
fluidsynth: debug: Polyphony exceeded, trying to kill a voice
fluidsynth: debug: Killing voice 3, index 7, chan 0, key 74
fluidsynth: debug: Polyphony exceeded, trying to kill a voice
fluidsynth: debug: Killing voice 4, index 8, chan 0, key 75
fluidsynth: debug: Polyphony exceeded, trying to kill a voice
fluidsynth: debug: Killing voice 4, index 9, chan 0, key 75
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write phase calculation): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write DSP coefficients): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write phase calculation): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write DSP coefficients): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number
fluidsynth: warning: FPE exception (before or in voice_write mod env): Denormal number

Reported by: pedrolcl

Original Ticket: fluidsynth/tickets/100

[derselbst]

I found a bug where the overflow_rvoice is not initialized correctly. Could you see if r435 solves this problem? Thanks!

Original comment by: diwic

[derselbst]

• status changed from new to closed
• resolution set to fixed

Yes, it is solved now.

Original comment by: pedrolcl