I am learning to use pioneer gear (cdj2000-nxs2) after a long time using Traktor. I do a lot of harmonic mixing and would like to use the master tempo feature to keep two tracks in key that are harmonically compatible but differ in tempo. I know that, in Traktor at least, this does noticeably affect the sound quality, even at +/- 0% and with lossless.
My question is this. Is there a noticeable difference in the sound quality when using the master tempo feature when using lossless audio vs 320 mp3. I have heard that this is so, that lossless audio mitigates the audio quality degradation of master tempo, but I am not sure if I agree with this. It doesn't really make sense, as I would expect that the 320 mp3 would be decoded within the player before any audio processing was applied, therefore the difference in quality should not be any more noticeable between 320 and lossless with the master tempo on vs off.
Can anyone confirm or deny this? IE, if using master tempo should you absolutely be starting with lossless audio in order to maximize the sound quality? Or does it make no more difference between 320 and lossless than any other situation? Thank you so much for the information.