Sound Cards for the Digital Mellotron.
Sound Card 03 contains 100 more Chamberlin sounds, for example the rhythms from the Music Master Chamberlins, more lead sounds from the M series Chamberlins and many sounds from the Chamberlin library that weren't used in any instruments! Here is the sound list for Sound Card 03.
Sound Card 03
Sound Card 03 contains 100 sounds and is inserted into the expansion slot of the M4000D series units. Then you have 200 sounds for immediate access and that can be mixed independently in the playlists you create.