unable to change volumes of mixer inputs?
unable to change volumes of mixer inputs?
- Subject: unable to change volumes of mixer inputs?
- From: Bob Sabiston <email@hidden>
- Date: Sat, 29 Dec 2012 13:16:38 -0600
Hello,
I asked about this back in July but I don't think anyone answered? I am doing synth audio on iOS, and I'm unable to change the volumes on the individual inputs to a Mixer Unit. Specifically this call seems to have no effect (on iOS -- the same code works on OS X):
OSStatus result = AudioUnitSetParameter (mixerUnit,
kMultiChannelMixerParam_Volume,
kAudioUnitScope_Input,
inputBus,
newGain,
0
);
But it seems that no matter what value I pass for newGain, the volume doesn't change. It seems to play at the loudest volume (unless I am running into the problem from my previous post).
Even if I set the gain to .01 it doesn't get any softer. Any ideas? I am able to control the overall output volume, but I am not able to change the individual input volumes.
Thanks
Bob
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