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Re: Newbie question: mono playback to left or right speaker only?
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Re: Newbie question: mono playback to left or right speaker only?


  • Subject: Re: Newbie question: mono playback to left or right speaker only?
  • From: Brad Ford <email@hidden>
  • Date: Mon, 12 Jan 2009 11:11:36 -0800


On Jan 12, 2009, at 10:02 AM, Jeremy Friesner wrote:

Hi all,

I apologize if there is an obvious answer to this question, but after half an hour of scrounging around I haven't found anything.

Currently I have a program that uses CoreAudio (OpenAComponent(), AudioUnitSetProperty(), AudioOutputUnitStart(), etc) to play back a mono stream of audio. The program works fine, but currently it outputs the mono audio to both the left and right speaker of my Mac.

What I'd like to be able to is tell it to output the mono audio to only the left speaker, or only the right speaker.

Use kAudioUnitProperty_AudioChannelLayout + input scope to tell the audio unit that your source is Left or Right.


-Brad Ford
QuickTime Engineering



What's the best way to do this? Do I need to change my program to output a stereo stream, and make half of the stereo stream always be silent? Or is there a more clever/efficient way?

Thanks,
Jeremy

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