Re: MatrixMixer questions
Re: MatrixMixer questions
- Subject: Re: MatrixMixer questions
- From: William Stewart <email@hidden>
- Date: Wed, 3 Dec 2003 12:25:12 -0800
On 02/12/2003, at 4:41 AM, Stefan Werner wrote:
Hi,
James McCartney <email@hidden> schrieb am 01.12.03 21:50:44:
I don't get an error when I set the
AudioStreamBasicDescription of an input to e.g. 6 channels, but after
doing that, I can't connect any
nodes to its input any more. Trying to establish a connection returns
-10865 -
kAudioUnitErr_PropertyNotWritable - what's that supposed to mean?
Are you setting the stream format after the unit has already been
initialized?
I figured it out in the meantime. Yes, I am setting the stream format
after initialization, but that
wasn't the problem.
It will become the problem - the matrix mixer allocates its internal
matrix based on the number of input and output elements, and their
formats *when* the MM is initialized.
Bill
Turned out that I forgot to set the stream format for the output of
the other
node, after fixing that it worked. The return value I got
(PropertyNotWritable) was misleading.
The MatrixMixer is very good about not doing work that it doesn't have
to. The additional CPU cost of unused crosspoints is very very tiny.
OK, so then I'll have to set a reasonable max value.
Stefan
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