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
Yes. The audio is going through the
mixer and is put into a ring buffer. From there it is encoded
and saved to a file. All of the audio comes through mixed as
expected.
The mixer is in an AUGraph. I get the AudioUnit for the mixer
node with:
Dominic Feira / Code Monkey / Ambrosia Software, Inc.
On Feb 17, 2005, at 3:05 PM, email@hidden
wrote:
Dominic, when you are getting the
parameter value are you currently
rendering and
supplying input sample frames which are non-zero? The parameter
value is meant
to give a measurement on the power of the input you're giving to the
mixer.
Chris Rogers
Core Audio
Apple Computer
Hello. I am trying to get
kStereoMixerParam_PreAveragePower from a
stereo mixer.
I'm doing the following:
Every time this runs I mLeftLevel comes back as -120.0.
AudioUnitGetParameter isn't returning an error. Any idea?
Perhaps
I don't understand something.
Dominic Feira / Code Monkey / Ambrosia Software, Inc.
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