In the interest of keeping one thread only: Karim Morsy also
replied with the idea that I might be able to setup a link from
AUHAL (input) -> mixer -> AUHAL (output), but the docs say that you
can only have one output unit in a graph. I tried to create
another unit using the same component description, but got error
-10862 (which I cannot see doco for).
From AUGraph.h:
kAUGraphErr_OutputNodeErr = -10862,
// AUGraphs can only contain one OutputUnit.
// this error is returned if trying to add a second output unit
You don't need to have a second output unit. You can use the same AU
for input and output, which enforces the requirement that (for
synchronization) there only be one device involved.
Make connections from the input/output unit's output scope, element 1
-- that's the device input.
Doug
--
Doug Wyatt
Core Audio, Apple
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