Comment by rfreiberger

I personally cannot tell, if I was mixing vinyl I honestly would never have known about this. But using a digital vinyl system like Serato which displayed the bpm as 100.0, it's very apparent the tracks will fluctuate. The other issue is since your turntable is keeping time, two of them playing the same BPM, say 100BPM can drift 1BPM in theory. That's a large number when playing slower songs like hip-hop, and easily cause drift within 15~30 seconds. It's not a big deal, most dj's ride the pitch fader but it's worthy of a mention that the Technics 1200's are just over engineered.