Re: Newbie question: mono playback to left or right speaker only?
Re: Newbie question: mono playback to left or right speaker only?
- Subject: Re: Newbie question: mono playback to left or right speaker only?
- From: Jeremy Friesner <email@hidden>
- Date: Fri, 16 Jan 2009 09:53:59 -0800
Hi all,
Just to follow up, with guidance from people on this list I was able
to figure out what to do. Here is the necessary code to specify which
speaker my mono output should go to:
SInt32 channelMap[] = {_isRightSpeaker?-1:0, _isRightSpeaker?
0:-1};
err = AudioUnitSetProperty(outputUnit,
kAudioOutputUnitProperty_ChannelMap, kAudioUnitScope_Input, 0,
channelMap, sizeof(channelMap));
if (err) LogTime(MUSCLE_LOG_ERROR, "Error setting audio unit
channel! (%i)\n", (int)err);
else LogTime(MUSCLE_LOG_INFO, "Sending audio output to the
Mac's %s speaker.\n", _isRightSpeaker ? "right" : "left");
Cheers,
Jeremy
On Jan 12, 2009, at 11:11 AM, Brad Ford wrote:
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
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden