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Re: Recording from remoteIO on iOS
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Re: Recording from remoteIO on iOS

  • Subject: Re: Recording from remoteIO on iOS
  • From: Lucas Ives <email@hidden>
  • Date: Wed, 20 Feb 2013 10:04:31 -0800


ExtAudioFileWrite is what you'll want here -- 

https://developer.apple.com/library/ios/#documentation/MusicAudio/Reference/ExtendedAudioFileServicesReference/Reference/reference.html

-l


On Wed, Feb 6, 2013 at 9:21 PM, Daniel Too <email@hidden> wrote:

Hi everyone,


I've been playing with the Momu toolkit to create some music on iPhone. It uses a single Audio Unit remoteIO and a render callback to do all of the work.

I'd like to record the output to a file in addition to outputting it through the iPhone output. 

At the moment, the ASBD going into the output is

Sample Rate: 22050

Format ID: lpcm

Format Flags: kAudioFormatFlagIsSignedInteger |  kAudioFormatFlagIsPacked |  kAudioFormatFlagIsNonInterleaved |   (24 << kLinearPCMFormatFlagsSampleFractionShift);

Bytes per Packet: 4

Frames per Packet: 1

Bytes per Frame: 4

Channels per Frame: 2

Bits per Channel: 32

I've tried lots of different ways to approach this, but I don't think I'm doing it correctly. 

How can I output this to a file? Can I use a recording callback on the output of the audio unit? How do I change the format of the data into something that I can write?


Thanks

Dan.


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References: 
 >Recording from remoteIO on iOS (From: Daniel Too <email@hidden>)

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