Aha, what happens when you try to do weird experiments on a Friday night and land on, "let's see what Speechbox driven through a tube model might even sound like at the most basic level!"
Like, super crude. a squared sine for the open phase and an exponential decay for the return. Basically the minimum
viable "not a square wave" pulse shape. What do you get?
Why of course, electric buzzer and misquito buzzer! I give you, 6 vowels. Let's play a new gameshow. Can you tell the vowels within the buzz? Ha. @fastfinge would be amused at this one. And no, we're not going tube model. 16 times the processing power at 44100 because the tube physics requires it is just. brutal.