Re: kStereoMixerParam_PreAveragePower

• Subject: Re: kStereoMixerParam_PreAveragePower
• From: Chris Rogers <email@hidden>
• Date: Fri, 18 Feb 2005 12:20:07 -0800
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Hmm...this didn't work for me. Forgive me for having problems with something so simple.

UInt32 metering = 1;
error = AudioUnitSetProperty(mixerUnit,

kAudioUnitProperty_MeteringMode,
kAudioUnitScope_Global,
0,
&metering,
sizeof(UInt32));

This is definitely done before I start asking for kStereoMixerParam_PreAveragePower from the mixer audio unit.

Dominic Feira / Code Monkey / Ambrosia Software, Inc.

On Feb 18, 2005, at 4:52 AM, Chris Rogers wrote:

Sorry Dominic, I should have also asked if you're enabling metering.

You need to enable it on the mixerUnit with the
kAudioUnitProperty_MeteringMode property.
A UInt32 value of 1 will turn it on. The reason you need to
explicitly enable it is because
it uses some of the CPU to compute the value (not a huge amount).

That should work better, good luck.
Chris Rogers
Core Audio
Apple Computer

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