Have been djing for over 35 plus years, starting off with 2 tape decks and a receiver with tape and aux and would mix with that. LOL, but it worked. putting the knob half way between aux and tape would mix the two signals.(bringing back memories). from crates of records and i mean crates 50 plus. and a numark dm1500 mixer i was the coolest dj around LOL. Setato is taking it to the another level and my back dont hurt anymore with carryin all them damn heavy crates!