All I know is what I know. The amount of turntable motor rumble and noise
Electrical Noise Internally generated electrical noise, such
as 60 Hz grounding hum
Wear Control how worn out the record is, from brand new to played a few thousand times
Dust The amount of dust on the record
Scratch The number and depth of scratches on the record
Warp The amount of warping and the warp shape for the record - from no warp to the edges totally melted and warped
Record Player Year The year of the record player - from current linear tracking turntables to 1930 phonographs
Stereo/Mono Switch between stereo and mono output
Input and Output Gain Set the gain in and out of the effect with visual level meter feedback