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Re: Multiple Output Music Device
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Re: Multiple Output Music Device


  • Subject: Re: Multiple Output Music Device
  • From: Jeremy Sagan <email@hidden>
  • Date: Fri, 17 Oct 2003 13:53:06 -0400

Bill,

I am confused by your answer here....

On Friday, October 17, 2003, at 01:50 AM, William Stewart wrote:


- Audio Unit reports the total number of channels via SupportedNumChannels().
For example, if I had two stereo pairs and two mono outs, I'd report 4 as my
number of outputs, and { 0, 6 } in response to SupportedNumChannels()

This is definitely wrong, as not a single bus can be set to 6 channels. Part of the motivation of having this property was to describe alternate settings of channelisations (Which this is not really a case of). Can I ask this - why are you providing 2 stereo pairs and 2 mono outputs?
<snip>
- Host interrogates the Audio Unit for number of output busses via
kAudioUnitProperty_BusCount

Yes

- For *each* output bus (element on the output scope), Host interrogates the
Audio Unit for the element's StreamFormat via kAudioUnitProperty_StreamFormat

Yes

This answer is yes? I thought that in the answer above you were saying that the supported number of channels applies to all busses. If it possible to inquire the number of channels for each buss using the element field on output scope can you please confirm this and if this is true then I don't understand why a single buss cannot be set to 6 channels.

Thanks,
Jeremy
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      • From: William Stewart <email@hidden>
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