Trigger MIDI from audio in Cubase 5 64bit
Cubase prior to v6 is long-known for not being very good at extracting drum audio and turning it into usable MIDI. If you use Cubase 32bit then you can download the free VST KTDrumTrigger which is pretty good for this. However, this VST does not work in v5 64bit.
I have devised a work-around that works pretty well as long as your drums are on separate audio tracks. If you only have one stereo file for drums then I’m afraid your quickest method will be writing the MIDI yourself.
My tutorial showing how to use side chaining in Cubase: http://youtu.be/Lzhy2aCwtEs