This is a Excellent Application on Learning ProphellerHead Reason 7 Includes Video Training and Practice Exam.
Reason is a computer program for creating and editing music developed by Swedish software developers Propellerhead Software. It emulates a rack of hardware synthesizers, samplers, signal processors, sequencers, and mixers, all of which can be freely interconnected in an arbitrary manner. Reason can be used either as a complete virtual music studio or as a collection of virtual instruments to be used with other sequencing software in a fashion that mimics "live" performance.