*spoiler alert*
drivers99: this is precisely what Casey ended up doing on Day 020 (at around the 2:34:00 mark) although he just used an "if" instead of "while"

Oh cool. That was an interesting section. (I'm going to try to catch up as soon as possible.)

This forum thread has been very helpful to me. I'm following along even though this project is beyond my skill level and this issue with the tone changing over time was bothering me. I couldn't tell if Casey was having the same problem on the stream as he never let the sound run far enough. I thought it was a bug that I had introduced. It was driving me nuts, no thanks for clarifying! I understand what's happening a lot better now.