I'm not sure whether it is okay to ask you something about precisely. I thought and code and experimented about calculating a soundwave difference between controlled one (Synthesized sound) and comparable one (user's practice sound)
First of all, I divided 6 levels of those sound wave with FTT and compared each level and make a total difference using TimeWarping algorithm. and finally got a total distance between those two soundwaves.
Have you heard or tested like that way before? Regardless I just appreciate anything.