Howdy, folks!
'Nother old dust****er weighin' in here:
In the same way that a cranked-up snare drum will affect the character of a backbeat differently than a Mutt Lange snare-of-doom, for example, with all else being equal...
IMO part of the appeal of the Motown records is the relationship between the sounds used and the songs played using them (along with the skills of the players, of course).
True enough, that was all happenstance because those sounds were just what those guys were getting on their nightly jazz gigs (not a lot of manipulation technology available to engineers back in them days). I've seen pics of Jamerson with his doghouse bass closer to the mic than the singers. Love that. Not to mention, Gordy being too cheap to replace the broken bottom head on the rack tom of one of the kits but they tracked with it anyway. Sure didn't seem to keep Motown from moving units at all.
That said, I'm a total anti-fan of the soup can, cranked-up-tight-as-a-gnat's-ass tom sounds that the jazz guys were getting back then. (I know part of that was the limits of the primitive "spoon in the slot" tom mounts on some of those kits ala' Gretsch and Slingerland.)
BUT....Have you heard any of the attempts to re-cut that stuff that they did back in the '70's and '80's, using what (at that time) were "modern" drum sounds? Remove the vocal tracks and they coulda been soundtracks to **** flicks. Yeccchhh....
Just like I personally hate Ringo's snare sound on the last couple of Beatles records. Like droppin' a sack of taters...BUT...picture a different snare on it and it just would be...for lack of a better term...wrong.
Just musings from a dottering curmudgeon. Thank ya fer yer indulgence.
ETA- A.M. radio. Mono. That stuff was mastered to sound good on A.M. radio. Totally different set of parameters.
OK, enough of what sounds like my defending of...whatever. Unintentional.
To address the OP, as stated previously: coated Ambassadors, "jazz"-size drums w/ felt strips on the BD, rack toms with the bottom head pitched pretty close to the top head (a third or less apart), snare drum tuned similarly and about mid-tight with loose-ish snare tension (typical be-bop at the time), sounds to me like 1 or 2 of them were digging the BD pedal's smackhammer into the head (Dig the intro of, "I Hear A Symphony". The pitch raises slightly at the end of each BD note. Dead giveaway.)
Lastly, and a biggie: THE ROOM. I'd read that when they moved Motown to L.A., they went back to Detroit at one point to retrieve the wood from the original room because they couldn't get that sound in L.A. You can't really have that sound without a similar room.
-One last ETA- Muffling. My take is wide open, except for the aforementioned felt strips on the BD and the internal muffler in the SD up tight against the head. The reason I say is because those guys weren't playing hard at all.
I say that because:
A.) Short of guitar, maybe a B3, and (later on) the bass, all of the instruments were acoustic. You mixed on the fly by positioning everything in order of its volume desired by its proximity to the mic. The louder you wanted it, the closer you put it to the mic. By nature, it's pretty easy for a drumkit to overdominate in a situation such as that, thus the guys' not really diggin' in.
B.) Those fellas were jazzers. They felt no need to crank up, anyway. No place for it in their world. (That said, it's fun to watch Bennie Benjamin slammin' on that Gretsch kit w/ the 24" BD in the Motown Revue footage.)
So if anyone should disagree, I get it. After all, I'm only speculating on SOME of this, based on 45 years experience.
Sorry for what's turned out to be a mini-book.
Goin' away now, I promise. :-)