One of my most-used features in Traktor is to search for BPM(range) in my collection by just entering a number in the search-box. Traktor than returns tracks with that BPM number and +/- 2BPM range. The same can be done with musical key. This is very handy, and I use it all the time.
I know we have filters, but this way of quickly searching for a BPM-range or Key-range, is so handy, I would LOVE to have it in Djay Pro!
