This is a great little video from the guys at Computer Music. Very apt for myself right now, as I'm going through a bit of a classic house phase at the moment. I've always been a sucker for these types of chords. From the guys themselves:
'Get 7 more videos on creating great piano, electric piano and organ parts in software with Computer Music 191's huge CLASSIC KEYS feature. Click http://bit.ly/cmmag191'