multichannel mixing on iphone with multiple mixers
multichannel mixing on iphone with multiple mixers
- Subject: multichannel mixing on iphone with multiple mixers
- From: Seth Delackner <email@hidden>
- Date: Tue, 27 Oct 2009 14:42:22 +0900
I'm currently rendering 8 in-memory audio files to the input busses of
a multichannel mixer, which is itself connected to another
multichannel mixer:
render 8 --> MA --2--> MB ---2--> out
You have to set the input and output volumes of the mixers otherwise
you get no output, but if say the source sample value is X, what set
of volumes on the series of mixer inputs and outputs will have no
gain? (X in == X out)
Second: If I don't have a rendering callback on MA and MB, they are
just connected, then I get stereo output. If I add a rendering
callback on MA (none yet on MB, just testing) then my output is
instantly automatically made mono. This implies that the 8 inputs are
being merged down to 1 output bus, and some default renderer simply
copies this to both busses?
I'm going through all these hoops to try to apply a processing phase
to only 6 of my channels, with the remaining 2 unprocessed inputs,
then downmix all that to mono and play that out of both left and right
output channels.
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