there's only 33 1/3 and 45 rpm nowadays, waaaayback there also was 78 rpm.
people sampled at 45 rpm back then to "increase" sample time not to get a certain sound. so i'd say 45 rpm.
but, why not look up the sp 12 specs and cram these into some bit crush plug.
not the same i know... but you can get results that are damn near.
at least i did using the sonic decimator.
"certain" people onhere will disagree though.
