I'm trying to record in a video images and sounds generated with unity. So far I have figured out how to get the video frames by rendering to a RenderTexture off-screen. However, it does not seem to be a similar mechanism for capturing audio data. I do not want to use external applications for recording, and I would prefer to record the audio data without actually using the speakers (say, I want to use an off-speaker buffer instead).

Therefore, I'm considering mixing the sounds myself. But then, I cannot find a way to obtain the sample data from AudioClips. Is there a way to do that?