QQPULSA303 RTP SLOT Every loop can be assigned to a key or trigger pad on a controller and tweaked with a seemingly endless collection of digital effects. If one loop plays at 120bpm (beats per minute) and the other at 138bpm, then it's the DJ's job to slow down the second record by pitch-bending it by ear. What is Music Mixing Software? Music mixing software is the creative engine behind loop-based music. It's a great way to turn Pro Tools into a real-time instrument for live performances.|And, what are the Top-selling Titles?