Re: [fluid-dev] qsynth 0.3.6 for mac osx

[Sven Meier]

Hi Pedro,

my Mac has an Intel processor.

>Try with larger values like 256x2 (=512).

That did the trick, thanks. Now everything works as expected.

Regards

Sven

On 04/14/2011 11:15 PM, Pedro Lopez-Cabanillas wrote:
> On Thursday 14 April 2011, Sven Meier wrote:
> > Hi,
> >
> >   >  The other Mac users on this list are also urged to report their
> >   >  experiences :-)
> >
> > here's my report:
> >
> > Fluidsynth starts and is loading the Soundfont correctly. Connecting
> > VMPK with Fluidsynth, the Midi indicator flashes and the messages dialog
> > is filled with fluidsynth:noteoff/fluidsynth:noteon confirmations.
> >
> > But
> > - no sound, no activity on the peak level meter either.
> > - after a while playing the virtual keyboard the messages dialog is
> > flooded with event_pre_noteoff/event_post_noteoff messages,
> > - then the following messages appears for each key press:
> >     fluidsynth: warning: Failed to allocate a synthesis process
> >
> > My own build of Fluidsynth is working flawlessly on my machine.
> Has your Mac an Intel or a PowerPC processor?
>
> One of the changes of the new coreaudio driver in post-1.1.3 is that you can 
> set the audio buffer sizes. The old driver had some fixed value selected by the 
> system. It is calculated now as the product of the buffer size (-z) multiplied 
> by the buffers count (-c). The defaults in Fluidsynth are 64x16 (=1024) which 
> is fine, but qsynth has 64x2 (=128) as defaults, which may be fine for the Jack 
> driver but too small for this new coreaudio driver, and may produce silent 
> output (also depends on the audio hardware, of course). Try with larger values 
> like 256x2 (=512).
>
> This setting needs to be fixed in qsynth for Mac OSX, even if it isn't the 
> cause of your problem.
>
> Regards,
> Pedro
>
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