Re: mono channel to stereo channel mapping problem.
Re: mono channel to stereo channel mapping problem.
- Subject: Re: mono channel to stereo channel mapping problem.
- From: Kevin Dixon <email@hidden>
- Date: Mon, 13 Jul 2009 20:32:00 -0700
I'm not sure about the API, but having a mono source centered in stereo
means that you have the same signal present on both channels. In
general, I would recommend attenuating the voice by -3dB, and then
copying it into both channels. Hope that sets you on the right path
-Kevin
Jong-young Park wrote:
Hello everyone.
I'm trying to make iPhone Apps(OS ver. 3.0) using AUGraph of Core Audio.
It's simply mixing two audio files using Audio unit.
Audio unit flow graph is,
ExtAudioFileOpenURL(voice) -
| -
AUMixer(kAudioUnitSubType_MultiChannelMixer) -
AUOutput(kAudioUnitSubType_RemoteIO)
ExtAudioFileOpenURL(music) -
It works good, but only problem is a single channel in voice file.
Music is ok, I can hear both left and right side well. (and music file
is 2 channels).
But, I only can hear left side from voice file. (and voice file is 1
channel).
I want to hear voice file in both side, (so called mono to stereo in
core audio mailing list.) but I can't find the solution.
I tried to use AUConverter, but it does not working with channelMap.
How to set ChannelMap to work mono -> stereo?
I need your help.
Thank you for reading.
-mocona-
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