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Looking up AU parameters (was: Re: kAudioUnitSubType_DynamicsProcessor)
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Looking up AU parameters (was: Re: kAudioUnitSubType_DynamicsProcessor)


  • Subject: Looking up AU parameters (was: Re: kAudioUnitSubType_DynamicsProcessor)
  • From: Chris Adamson <email@hidden>
  • Date: Mon, 03 Dec 2012 17:29:24 -0500

[This appears not to have made it to the list. Apologies to anyone who gets it twice.]

Pier--

Xcode: File → Open Quickly… → AudioUnitParameters.h:

// Parameters for the AUDynamicsProcessor unit
enum {
// Global, dB, -40->20, -20
kDynamicsProcessorParam_Threshold = 0,

// Global, dB, 0.1->40.0, 5
kDynamicsProcessorParam_HeadRoom = 1,

// Global, rate, 1->50.0, 2
kDynamicsProcessorParam_ExpansionRatio = 2,

// Global, dB
kDynamicsProcessorParam_ExpansionThreshold = 3,

// Global, secs, 0.0001->0.2, 0.001
kDynamicsProcessorParam_AttackTime = 4,

// Global, secs, 0.01->3, 0.05
kDynamicsProcessorParam_ReleaseTime = 5,

// Global, dB, -40->40, 0
kDynamicsProcessorParam_MasterGain = 6,

// Global, dB, read-only parameter
kDynamicsProcessorParam_CompressionAmount = 1000,
kDynamicsProcessorParam_InputAmplitude = 2000,
kDynamicsProcessorParam_OutputAmplitude = 3000
};

This is likely the entirety of this audio unit's public documentation.

--Chris

On Dec 2, 2012, at 11:12 PM, Pier <email@hidden> wrote:

Hi, 

I would like to use this kAudioUnitSubType_DynamicsProcessor  Audio Unit effect in my iOS project as it seems to be a compressor that may be useful - but for the life of me I can't find any documentation on this - why is this so? 

Thanks. 

--
Pier.
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  • Follow-Ups:
    • Re: Looking up AU parameters (was: Re: kAudioUnitSubType_DynamicsProcessor)
      • From: Chris Adamson <email@hidden>
References: 
 >kAudioUnitSubType_DynamicsProcessor (From: Pier <email@hidden>)

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