Re: What happened to classic bass drum tuning?
Bonham did muffle. Sure he didn't stuff the bass drum with blankets et al, but a felt strip on batter and reso is muffling, however you slice it.
And fwiw, so is a PS3. That little plastic ring is there to dampen overtones. Granted it's not a big foam ring....and certainly not the same extent as stuffing the bass drum with a blanket, but it's still a pre-muffled head nonetheless.