Re: [fluid-dev] problems with fluidsynth 1.1.5 on a raspberry pi

[David Henningsson]

On 10/12/2012 07:59 PM, Simon Eigeldinger wrote:
> Hi all,
>
> I am new to fluidsynth and i tried it to run it on my raspberry pi
> computer.
> its a small ARM board with a 700 mhz processor and 256 mb ram.
>
> When i tried it it played the file for a few seconds and then it strated
> to kind of grind or hum. sounded like a saw wave tone got quite low but
> went up and down the scale.
>
> here's the output of the console:
>
> $ fluidsynth -a alsa /usr/share/sounds/sf2/FluidR3_GM.sf2 10.mid
>
> FluidSynth version 1.1.5
> 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.
>
> Parameter '10.mid' not a SoundFont or MIDI file or error occurred
> identifying it
> .
> fluidsynth: warning: Requested a period size of 64, got 256 instead

Have you tried a larger period/buffer size, e g -z 4096 or so? Does that 
make any difference?

> Type 'help' for help topics.
>
> fluidsynth: warning: Failed to set thread to high priority
> fluidsynth: warning: Failed to set thread to high priority

Also; as someone else said, you have not set your system up for 
low-latency audio, i e the /etc/security/limits stuff. The risk of 
underruns are big, especially when you run it together with the lowest 
possible latency (256 samples).

// David