Enable system volume when driver doesn't
Enable system volume when driver doesn't
- Subject: Enable system volume when driver doesn't
- From: "Mikael Hakman" <email@hidden>
- Date: Mon, 10 Mar 2008 16:54:28 +0100
- Organization: Datakonsulten AB
I need to control volume level when using standard system media applications
and (external) audio interfaces that don't enable OS X master system volume
control. I need to enable system volume so that the user could use Apple IR
remote to control it. I don't know what is available and/or possible to
accomplish so I would like you to comment on conceivable approaches.
One way to do it would be a kind of virtual audio device driver. Such a
driver would take name of real audio interface as a parameter. The driver
would be chosen as default audio output by the user. It would present itself
to the operating system in such a way that the system volume would be
enabled. It would intercept the outgoing audio stream(s), rescale the
volume, and pass modified stream(s) to the real device driver.
I don't know whether it is possible to implement such driver at all and what
technology (API) would you use. If it is then perhaps there is such driver
already available? If it isn't available then I would appreciate pointers to
relevant API and example documents.
TIA
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