That's an interesting hypothesis. I listen to audiobooks at 2 or 3 times speed, depending on the clarity of the readers voice. When I first heard the "green n

That's an interesting hypothesis. I listen to audiobooks at 2 or 3 times speed, depending on the clarity of the readers voice. When I first heard the "green needle" vs. "brainstorm" audio, I heard "brainstorm" once but then the pitch of the audio seem to shift up and I could only hear "green needle" after that. The change in audio quality was similar to what I've experienced when listening to a book at 1X speed and then shifting it up to 2X or 3X. I haven't been able to reproduce this though. Now the recording always sounds like "green needle" to me.