The Moog Source is a very nice synth and the first and only Moog to replaced the buttons with a membrane panel. And the first Z80 microprocessor-controlled Moog with patch memory. The sound is fantastic, very deep and powerfull. I love the Sources incredible low end sound like the Moog Taurus 1. The best Taurus 1 emulation I have ever heard. In my ears better than the Taurus 3. The Source is perfect for very nice bass and lead sounds. For me one of the best monophonic analog synths ever.