Re: Need help with the MatrixMixer
Re: Need help with the MatrixMixer
- Subject: Re: Need help with the MatrixMixer
- From: Robert Grant <email@hidden>
- Date: Sun, 16 Nov 2003 17:45:04 -0500
Hi James,
Thanks for the response.
So I think it boils down to the input buses and how to keep them happy.
I'm confused about the SetRenderCallback and why it needs to be set
when you're wiring the mixer input to another node in the graph.
And is there an issue about matching channels on the buses? I know the
StereoMixer can accept either mono or stereo buses - is the MatrixMixer
more particular? Why does connecting a subgraph cause the mixer to stop
producing output?
Thanks,
Robert.
On Nov 16, 2003, at 4:20 PM, James McCartney wrote:
On Nov 15, 2003, at 4:48 PM, Robert Grant wrote:
I'm having a hard time getting sound to pass through the matrix
mixer. I'm basing what I'm doing on the MatrixMixerTest example app
and everything seems to be wired up OK - I'm definitely getting my
synths pulled on, but no sound.
There seems to be a variety of different places where levels need to
be set and I'm setting them all I think. Here's what I've got:
set the input level for each channel on each input bus:
kMatrixMixerParam_Volume, kAudioUnitScope_Input
enable each input bus
kMatrixMixerParam_Enable, kAudioUnitScope_Input
set the level of each intersection within the matrix
kMatrixMixerParam_Volume, kAudioUnitScope_Global
Some more explication on addressing these intersections would be
good.
set the level of each output channel on each output bus
kMatrixMixerParam_Volume, kAudioUnitScope_Output
set the global level of the mixer
kMatrixMixerParam_Volume, kAudioUnitScope_Global, 0xFFFFFFFF
Enable each output bus
kMatrixMixerParam_Enable, kAudioUnitScope_Output
That all looks OK. Buses are enabled by default so you shouldn't have
to specifically enable them.
how about silent bits? sending any in? getting any out?
--
james mccartney
apple coreaudio
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