I've got a callback from which I am attempting to capture audio from a remote I/O unit in an audio graph. Inside of my callback I have an `AudioBufferList` in an `AudioUnitRender` function that I need to store non-interleaved data from two channels.

**Here's a code snippet for context:**

```
//audiounit render function inside of a callback    
OSStatus status;
        status = AudioUnitRender(THIS.ioUnit,    
                                 ioActionFlags,
                                 inTimeStamp,
                                 0,
                                 inNumberFrames,
                                 &bufferList);

//want to initialize and configure bufferList to store non-interleaved data from both channels
...

//write audio data to disk 
    OSStatus result;
        if (*ioActionFlags == kAudioUnitRenderAction_PostRender) {
            result =  ExtAudioFileWriteAsync(THIS.extAudioFileRef, inNumberFrames, &bufferList);
            if(result) printf("ExtAudioFileWriteAsync  %ld \n", result);}
        return noErr; 

```

Does anyone know how to do this?

Thanks.