Apple

Oh and iphone audiounits use 8.24 fixed point data format for processing. They don;t pass compressed data to each other. If you want to write that data to somewhere else you have to you the audiounit render function in your callback and copy the data somewhere else for compression somewhere else. or you could use the audio converter or extaudiofile(which has a built in audio converter object) in the render callback along with audiounitrender().

----- Original Message ----
From: Daniel Elliott <email@hidden>
To: Inca R <email@hidden>; email@hidden
Sent: Friday, 3 October, 2008 3:58:20 PM
Subject: Re: REMOTE IO Audio Unit

How do we get the remoteIO as an input device?? I would be very grateful to see your code!

----- Original Message ----
From: Inca R <email@hidden>
To: email@hidden
Sent: Friday, 3 October, 2008 3:22:38 PM
Subject: REMOTE IO Audio Unit

Hi;
I manage to write some sample code that uses the remote io audio unit to capture voice samples from the mic.
the problem I have now is that I need to control the size of the data I get in the render callback.
I tried using the audio session service property

kAudioSessionProperty_PreferredHardwareIOBufferDuration
I set the property to be 0.02 seconds that in linear PCM 1 channel 16 bit is about 320 bytes but I'm getting 

256 bytes. There is any other parameter/property I have to set ?

Also I see that I'm getting errors when trying to set the Audio Unit Format to uLaw.
Do I need to set any Audio Convert code here ? I thought it is enough to set the audioformat.


Thanks
Inca