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Re: 3D Mixer Equal Power Panning - Follow up on panning
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Re: 3D Mixer Equal Power Panning - Follow up on panning

  • Subject: Re: 3D Mixer Equal Power Panning - Follow up on panning
  • From: James McCartney <email@hidden>
  • Date: Tue, 17 Apr 2007 11:34:06 -0700

On Apr 17, 2007, at 11:29 AM, James McCartney wrote:

AudioChannelLayout *acl = (AudioChannelLayout*)calloc(1, sizeof(AudioChannelLayout) + 2 * sizeof(AudioChannelDescription));

acl->mChannelLayoutTag = kAudioChannelLayoutTag_UseChannelDescriptions;

acl->mNumberChannelDescriptions = 3;

acl->mChannelDescriptions[0].mChannelLabel = kAudioChannelLabel_Ambisonic_W;

acl->mChannelDescriptions[1].mChannelLabel = kAudioChannelLabel_Ambisonic_X;

acl->mChannelDescriptions[2].mChannelLabel = kAudioChannelLabel_Ambisonic_Y;

UInt32 propertySize = sizeof(acl);

OSStatus err = AudioFileSetProperty(afid, kAudioFilePropertyChannelLayout, propertySize, acl);

free(acl);


...never write code in email
should be more like this:

UInt32 propertySize = sizeof(AudioChannelLayout) + 2 * sizeof(AudioChannelDescription);
AudioChannelLayout *acl = (AudioChannelLayout*)calloc(1, propertySize);
acl->mChannelLayoutTag = kAudioChannelLayoutTag_UseChannelDescriptions;
acl->mNumberChannelDescriptions = 3;
acl->mChannelDescriptions[0].mChannelLabel = kAudioChannelLabel_Ambisonic_W;
acl->mChannelDescriptions[1].mChannelLabel = kAudioChannelLabel_Ambisonic_X;
acl->mChannelDescriptions[2].mChannelLabel = kAudioChannelLabel_Ambisonic_Y;
OSStatus err = AudioFileSetProperty(afid, kAudioFilePropertyChannelLayout, propertySize, acl);
free(acl);


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References: 
 >NxM-Effects in Logic (From: Stefan Huber <email@hidden>)
 >Re: NxM-Effects in Logic (From: Stefan Gretscher <email@hidden>)
 >Re: NxM-Effects in Logic (From: William Stewart <email@hidden>)
 >3D Mixer Equal Power Panning (From: Bob Lang <email@hidden>)
 >Re: 3D Mixer Equal Power Panning (From: William Stewart <email@hidden>)
 >Re: 3D Mixer Equal Power Panning (From: Bob Lang <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: Bob Lang <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: William Stewart <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: Richard Dobson <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: Shawn Erickson <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: William Stewart <email@hidden>)
 >Re: 3D Mixer Equal Power Panning - Follow up on panning (From: James McCartney <email@hidden>)

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