Dears,
I'm a mobile dj with ****** axis 8 scratch cd-players..
I wanted to know.. do you really 'scratch' the record while scratching?
Thnx

no you're not actually scratching, it's just the sound being processed with the digital effects processor inside the cd player as the disc passes over the laser. No harm to your cds.

Is that the same with a turntable and a record?

with a record, the needle physically touches the grooves on the record and it picks up an electro-magnetic signal which is converted into sound:
a motor turns the platter.
in the case of a belt-driven turntable, the motor is connected to a rubber belt which turns the platter, reduces vibration noise coming from the motor.
the needle (stylus) which is housed by the cartridge, is connected to the tonearm.
the needle picks up vibrations from the grooves of the record and outputs the sound.

Yep think of a groove in the record as a bumpy muddy road, and your jeep's wheels/suspension as the needle. The bumps in the grooves are raised and unraised for correct height and distance to produce the right note when the needle goes over it. So when you scratch your just playing a part of the record back and forth at different speeds which creates the scratch sound. But back to the jeep, and your question of actually scratching the record... well when you scratch the platter tends to shake and the needle can jump the groove into another groove (skip) to counteract this many people put more weight on the needle to keep it in the groove, so when this happens, the needle can wear down the bumps in the groove. So bumpy muddy road and a jeep... the jeep is having a heck of a time on the road and it's gaining air off all the bumps and getting kick around, but then you take a tank and it dosnt get kicked around but it flattens out basically everything in front of it... see what im saying?