In relation to -b and -B and Windows MME drivers, anything smaller
than 1024 or 2048 will cause drop-outs because that particular mode
of output can't have any smaller buffers (it sits in front of a mixer that
prevents that).
If you are using a GUI, it's most likely this that is setting the device
number and you will have to set it there. Otherwise a -odacN would
set device N.
Victor
----- Original Message -----
From: Jim Aikin <midiguru23@sbcglobal.net>
Date: Friday, July 31, 2009 10:25 pm
Subject: [Csnd] Re: Re: RE: Re altime Audio Output Gargling
To: csound@lists.bath.ac.uk
>
>
> Michael Gogins-2 wrote:
> >
> > I'm afraid this is a little bit complex.
> >
> > PortAudio does see the -b and -B options, and they do matter.
> >
> > Your vague suspicion is, I think, the case., Plain -dac
> defaults to
> > whatever Windows thinks is the audio output. This may or may
> not be
> > what you want. -dacN will choose the driver listed as N by
> Csound when
> > it runs.
> >
>
> Thanks, Michael. (And I apologize for being snarky about the
> file in the
> examples folder!) Here's my tentative diagnosis -- subject to
> follow-up from
> wiser heads. In version 5.10 for Windows (running under XP SP3):
>
> 1) The number following odac is being ignored. No matter how I
> set it, the
> audio output ALWAYS goes to the port specified in the Windows
> system control
> panel as the default audio device.
>
> 2) Settings for -b and -B, if they exist, prevent PortAudio from
> sendingdata to the Windows audio device in a manner that it can
> deal with. The
> result is gargling caused by buffer underruns or something
> similar. If there
> are NO settings for these options, PortAudio produces good
> output, though
> with high latency, making it unsuitable for any sort of real-
> time MIDI
> performance.
>
> 3) Because the GUI automatically sets -b and -B, it can't be used.
>
> If anyone can suggest tests that will further narrow this down,
> I'll be
> happy to try them.
>
> --JA
> --
> View this message in context: http://www.nabble.com/Realtime-
> Audio-Output-Gargling-tp24760065p24763343.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
>
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Dr Victor Lazzarini, Senior Lecturer, Dept. of Music,
National University of Ireland, Maynooth