Listening to yourself on a 20ms delay is a far different thing than listing to someone else on the same delay. The latter is what you experience in every day li

Listening to yourself on a 20ms delay is a far different thing than listing to someone else on the same delay. The latter is what you experience in every day life all the time as sound travels about 1ms/foot. The former causes a negative feedback loop that will cause problems as you try in vain to effect an impossible correction. https://en.wikipedia.org/wiki/Delayed_Auditory_Feedback https://en.wikipedia.org/wiki/Delayed_Auditory_Feedback