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HAL Input gain
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HAL Input gain

  • Subject: HAL Input gain
  • From: Martin Hairer <email@hidden>
  • Date: Wed, 13 Nov 2002 08:42:23 +0000
Hi,

I am using the

kAudioDevicePropertyVolumeRangeDecibels
kAudioDevicePropertyVolumeDecibels

selectors to adjust input gain. It seems that on one of my tester's machine, this doesn't
work for the iMic. Is it possible (I know it's possible in theory but I mean in real-world)
that a driver (more specifically the USB Audio driver) implements

kAudioDevicePropertyVolumeScalar

but doesn't implement the above selectors? I would have thought that if a driver accepts to
change its gain, it should accept it in both dB and absolute values... If not, is there a "default"
dB range to display to the user? Thanks,

Martin

HairerSoft
http://www.hairersoft.com/
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