Note by @fastfinge

@cachondo @Tamasg @jscholes @ZBennoui We also lack tools as blind people. For example, I wish I could visually examine the shape and spectrogram of sounds. A useful step here would be to get eloquence to generate a pure, single-note open "aaa" or "eee" tone, and understand the shape of the resulting sound wave. But there are just no accessible tools to do that. So instead we have to go by listening and guess work.