The Mixer has three docks for tracks (left, middle and right) and can be stretched horizontally or vertically by clicking the edges and dragging. There are 125 x Insert Tracks for receiving input from plugins and external audio Inputs, 1 x Current track for hosting tools like Edison and Wave Candy and a Master track for master effects processing. Unless specifically directed, newly added Channels are routed to the Master Mixer Track. All audio in FL Studio passes through the Mixer.