Okay, I might hit a time machine button but honestly first three pages didn't show results so apologies for raising this topic up twice haha
On one hand, whatever the magic and wherever insides go, there are fewer of them or they are larger when inflating, right? So since the spaces are wider, the tone produced by voice glands (is it glands in English?) should be much much lower. May be as lowest male voice or even infrasound. Kinda like when the poor birdie competes with Fiona in Shrek her voice when she is so round and stretched and big is much lower than her regular voice
