iPhone remoteIO audio unit question
iPhone remoteIO audio unit question
- Subject: iPhone remoteIO audio unit question
- From: Bruce Meagher <email@hidden>
- Date: Fri, 30 Oct 2009 17:07:57 -0700
Hi all,
I have a question about the RemoteIO audio unit on the iPhone and I'm
hoping someone on the list can comment if what I'm doing is OK (or is
just plain dumb!)
I've created a little Objective-C class that plays my pcm based sound
effects through a RemoteIO audio unit. I pass a buffer to a play
method and the audio starts playing with very little delay (my render
callback starts playing the buffer within
CurrentHardwareIOBufferDuration samples). Exactly what I needed.
Since I'm such an OO guy... when I wanted to play two sounds
simultaneously I just created another instance of my little Objective-
C class. This seems to work fine on the simulator and device, and the
sounds appear to be mixed just fine. However, I'm wondering if I'm
breaking some type of rule by creating two RemoteIO audio units inside
my app (and just by luck this is working). Clearly there's some
underlying system process that mixes audio from all the different
sources (ipod, sms, phone, calender,... etc) so is having two RemoteIO
audio units in one app ok?
I can create graph with a mixer connected to the remoteIO audio unit,
but creating two instances just seemed to be so easy (although in
hindsight maybe not the right thing).
Anyone know if this is OK?
Bruce
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