I’ve upgraded the framework and tried this out. So far, no luck.
Are you not using the AVFoundation framework to handle the audio input within the framework? I was hoping this was the case, because I believe you can use AVCaptureInput objects to do things like waveform analysis of an audio stream and still pass it through to output like a video file.
SaveThatWave might do what I want if I can’t figure out another approach.