AudioUnits and Volume
AudioUnits and Volume
- Subject: AudioUnits and Volume
- From: Tobias Rundström <email@hidden>
- Date: Thu, 2 Feb 2006 16:15:45 -0300
Hello,
A few months ago I wrote a CoreAudio output driver for XMMS2 (http://
xmms2.xmms.org) and it has been working beautifully ever since.
Latest addition to the XMMS2 API is the ability to control volume on
multiple channels. I would like to support this in the coreaudio
driver also.
Two problems arise:
I have been searching the documents on apple.com and google and
everywhere it seems to mention using CoreAudios HAL API to change
volume. AudioDeviceGetProperty (...). Does this mean that I can't
change volume for the higher level (AudioUnits)?
Even if I can manipulate the volume I can't find a good method to
list available channels on the current device. Is there something for
this in the CoreAudio API somewhere?
Thanks.
-- Tobias
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