You can also use a VSTi like RapidComposer Music Prototyping and Automated Music Composition There is a Re-wire VSTi ReWire VST - VST plugin with ReWire works with midi. You can Render it by recording the VI to another track. MidiIn 32bit Win Mac use JBridge for 64 Insert Piz Here - midiIn
MidiOut 32bit Win Mac use JBridge for 64 Insert Piz Here - midiOut can be used for MTC sync to another audio app (but Mac midiOut lacks MTC) The piano roll editor don't sync to the host so you can use MidiLooper piano roll 32/64 Win Mac Insert Piz Here - midiLooper Load IL Minihost Modular (FX).dll into a track with a wav or empty wav Set AU start time to 1:2.00 to sync bars n beats to vsti's like EZDrummer EZKeys RapidComposer etc. Join the Image-Line Forum and download free MiniHost 32/64 Win or Mac use IL Minihost Modular (FX).dll I'll just be quick to mention this for anyone interested in that four letter word (MIDI), and get out of here quick as I only just escaped last time with my life