[fluid-dev] Re: coreaudio driver bug

[Stéphane Letz]

> 
> Message: 3
> Date: Fri, 24 Sep 2010 21:08:16 +0100
> From: Victor Lazzarini <address@hidden>
> Subject: Re: [fluid-dev] coreaudio driver bug
> To: address@hidden
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="us-ascii"
> 
> The problem seems to be audio hardware related. It is playing fine  
> with builtin audio, but my external USB soundcard produces the  
> distorted output I have been reporting here. Interestingly, portaudio  
> and jack seem to cope OK with it. I'll investigate more.
> 
> Victor

Developing a correct CoreAudio driver able to adapt to any hardware with any 
channel mapping is a bit more work.

The right way is to use AUHal audio unit.

See : http://developer.apple.com/library/mac/#technotes/tn2002/tn2091.html

Or PortAudio driver (more complex since duplex..) 
http://portaudio.com/trac/browser/portaudio/trunk/src/hostapi/coreaudio/pa_mac_core.c

Or Jack CoreAudio driver (even more complex since duplex and able to aggregate 
in/out) : 
http://trac.jackaudio.org/browser/jack2/trunk/jackmp/macosx/coreaudio/JackCoreAudioDriver.cpp

FluidSynth should be much simpler, since it is output only.

Stéphane Letz