My obscure skill set is finally of use!
The Sizzle Tone font is Davida from 1965.
Bonus trivia: That Big Muff font is older than you'd think but had a revival through Art Nouveau.
It feels pointless to ask at this point, but do you sincerely not understand that this is about the limits of human brains and not ears? Do you understand that perception is modulated by expectation? Do you understand why test blinding was invented?