In theory, yes. In reality, vinyl often suffers from the average to criminally bad state of the turntable's needles. In fact, I often had to "detune" my output to match the horridly worn needles.
Anyway, the same applies when you switch from vinyl to CD. I mean, let's be honest, how many DJs actually still buy physical CDs? Most of them go to beatport, itunes or whatever and burn them.
Really, you shouldn't bother about what others say about you as long as you can deliver.
(I've got to admit that it helps to know that I could destroy most of the badmouth DJs on MKIIs or CDJs if I just could be bothered)
Edit: Oh, and BTW, the mp3 quality discussion is as old as the format itself. I personally never got to know anyone in person that could tell a 320k mp3 from an uncompressed wav file. Certainly it never happened to me that someone in a club came to the booth and complained about the sound quality of my mp3 file based set. But that's kinda off-topic, I guess.
Bookmarks