Hi Etienne,
first please try to find out if Fluidsynth is actually the problem or if
there is something wrong with your audio setup. Maybe try to play a normal
wav file via the alsa device:
$ aplay -D hw:1,0 /path/to/a/soundfile.wav
For the sound file, use one in the format that you want fluidsynth to
output. So if you want it to render 16bit 441000 audio, then try to play a
stereo wav with 16 bit and 41000 sample rate.
See if simply playing the wav file also results in distorted audio.
Cheers
Marcus
Am Do., 14. Nov. 2019 um 22:17 Uhr schrieb Etienne Besançon <
besancon.etie...@wanadoo.fr>:
> Hi!
>
>
>
> I'm running FluidSynth on a Single Board Computer, a Hardkernel Odroid C1+
> that is actually stacked with a audio board integrating a high-end DAC. The
> aim is to turn this into a MIDI expander. Long story short, that actually
> runs pretty good on my desktop computer but got a very distorted sound on
> the SBC.
>
>
>
> The MIDI instrument is well discovered:
>
> odroid@odroid:~$ lsusb
>
> Bus 001 Device 005: ID 2341:8037 Arduino SA
>
>
>
> Fluidsynth is configured as follow:
>
> odroid@odroid:~$ fluidsynth -C0 -R0 -r 44100 -v -d -a alsa -o
> audio.alsa.device=hw:1 -o synth.polyphony=64 -m alsa_seq
> /home/odroid/Documents/Bandoneon.sf2
>
> FluidSynth version 1.1.6
>
> Copyright (C) 2000-2012 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: prog 0 0 0
>
> fluidsynth: prog 1 0 0
>
> fluidsynth: prog 2 0 0
>
> fluidsynth: prog 3 0 0
>
> fluidsynth: prog 4 0 0
>
> fluidsynth: prog 5 0 0
>
> fluidsynth: prog 6 0 0
>
> fluidsynth: prog 7 0 0
>
> fluidsynth: prog 8 0 0
>
> fluidsynth: prog 9 128 0
>
> fluidsynth: warning: No preset found on channel 9 [bank=128 prog=0]
>
> fluidsynth: prog 10 0 0
>
> fluidsynth: prog 11 0 0
>
> fluidsynth: prog 12 0 0
>
> fluidsynth: prog 13 0 0
>
> fluidsynth: prog 14 0 0
>
> fluidsynth: prog 15 0 0
>
> Type 'help' for help topics.
>
>
>
> event_pre_noteon 0 60 106
>
> event_post_noteon 0 60 106
>
> fluidsynth: noteon 0 60 106 00000 36.312 3.550 0.000 0
>
> event_pre_noteoff 0 60 106
>
> event_post_noteoff 0 60 106
>
> fluidsynth: noteoff 0 60 0 00000 3.574 1
>
> event_pre_noteon 0 60 106
>
> event_post_noteon 0 60 106
>
> fluidsynth: noteon 0 60 106 00001 39.626 3.876 0.000 0
>
> event_pre_noteoff 0 60 106
>
> ^C
>
>
>
> The instrument well connected:
>
> odroid@odroid:~$ aconnect -io
>
> client 0: 'System' [type=kernel]
>
> 0 'Timer '
>
> 1 'Announce '
>
> client 24: 'Arduino Micro' [type=kernel]
>
> 0 'Arduino Micro MIDI 1'
>
> client 128: 'FLUID Synth (3113)' [type=user]
>
> 0 'Synth input port (3113:0)'
>
> odroid@odroid:~$ aconnect 24 128
>
>
>
> Well, everything looks fine but the sound I get when playing the midi
> instrument is very distorted, noisy. Changing the rate did not improved,
> playing with the buffer a little bit. Weirdly enough, switching output to
> pulse audio ("fluidsynth -a pulseaudio...") gives expected sounds but with
> a 2~3 seconds latency.
>
>
>
> Any clue about this? How can I get more details regarding what going on?
>
>
>
> Thanks!
>
> HLB
>
>
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