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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