Module Drum Machine D 4 Alesis

http://www.youtube.com/watch?v=vmtlLK4jdc4
http://www.youtube.com/watch?v=7uDpGsmRjHM
http://www.youtube.com/watch?v=Lxum4L2Rqss
http://www.youtube.com/watch?v=srwNwtJ2ESs
http://www.youtube.com/watch?v=bGXh8Bk1DwM
http://www.sonicstate.com/synth/alesis_d4
http://www.digitalimagepro.com/d4.html
http://www.vintagesynth.com/misc/d4.php
http://www.polynominal.com/site/studio/gear/sold/alesisD4/d4.html
http://en.wikipedia.org/wiki/Alesis