device seems to be powerful enough.
maybe you can also try to disable 64bit floating point operations and use
32bit with cmake enable-floats options
also if you are not using pulse at all, try to disable it completely
Philippe
On Fri, Nov 15, 2019 at 9:34 AM Marcus Weseloh <mar...@weseloh.cc> wrote:
> 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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