This is pretty interesting. Using rekordbox you can tag your songs with unique information along with the normal items such as artist and track information. Kuvo will keep track of the times the song is played along with other information such as the club name, Dj name etc by using a embedded box at the venue location.
Seems like a great idea, check out the video: http://www.youtube.com/watch?v=DAyFJ6155Gg#t=53
Bookmarks