I am trying to play audio from my sample editor app through an au
graph which consists of effects and a standard output unit at the end.
I set a render callback in the head unit of the graph which pulls
data through a converter. To find the target format for the
converter I query the head au, but I always get an invalid format,
or rather it seems the query doesn't fill in anything. The graph is
updated and initialized at this point (as reported by the relevant
graph functions). Before I had naively tried to set the input
format on the au manually as I had done when playing directly to
the output au, but there I had gotten an error, telling me the unit
was not initialized.
Maybe the error was telling you that the unit *was* initialised -
with most AUs you can't change their format when they are initialised.
Now there is no way to ask a unit if it is initialized, but I
suppose when the graph is updated and initialized the units in it
will also?
yes - unless they aren't involved in any connections - in that case,
as soon as you connect to or from an AU, it is then initialised.
Bill
Daniel Oberhoff
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