Re: [fluid-dev] Jack and CoreAudio are mutually exclusive

[josh]

Hello Ebrahim,

Quoting Ebrahim Mayat <address@hidden>:
> Hello again
>
> I just tried 271 and sound driver function has changed as follows:
>
> If Jack is linked during compilation, fluidsynth can be run with jack
> as the audio driver  but it cannot be run with the coreaudio driver:
>
> $ fluidsynth -a coreaudio  ~/sf2/GeneralUser_GS_FluidSynth_v1.43_RC1.sf2
> FluidSynth version 1.1.0
> Copyright (C) 2000-2009 Peter Hanappe and others.
> Distributed under the LGPL license.
> SoundFont(R) is a registered trademark of E-mu Systems, Inc.
>
> fluidsynth: error: Failed to get the default buffer size
> Failed to create the audio driver
>
> The only way I can run fluidsynth with coreaudio is to first remove and
> trash my Jack installation and then build fluidsynth without Jack.
>
> $ fluidsynth -a coreaudio  ~/GeneralUser_GS_FluidSynth_v1.43_RC1.sf2
> FluidSynth version 1.1.0
> Copyright (C) 2000-2009 Peter Hanappe and others.
> Distributed under the LGPL license.
> SoundFont(R) is a registered trademark of E-mu Systems, Inc.
>
> Type 'help' for help topics.
>
> >
>
> Is this by design ?
>
> I do not presently use Firewire audio interfaces so I cannot say if
> Firewire sound drivers (libffado?) can or cannot co-exist with Jack.
>
> E

It sounds as if you may have multiple audio interfaces?  I notice that  
the FluidSynth coreaudio driver doesn't currently have support for  
specifying which audio device to use.  Seems a call to  
AudioDeviceGetProperty() is failing when attempting to get the default  
buffer size.  I'm not sure why that would happen though, but perhaps  
its using the wrong audio device?  The driver could be improved to  
display what the particular failure is which would help diagnose the  
problem.

Josh