Playing a record
at the wrong speed
is absolutely vital
for the art of beat matching
. As not every track
are the exact same BPM
(Beats per minute
), you need to adjust the pitch
so that you can line them up correctly.
Most modern turntables, such as Technic's SL-1200s, have a variable pitch control that allow the adjustment of -8% to +8%.
See Beat Matching 101: A dj primer.