Can anyone tell me the model #'s on the cards that are compatible with the Roland U20? I'm looking to buy some extra sounds for my board and am confused if the cards for all of Roland's U series keyboard are interchangeable or if there are specific ones for the U20?

Secondly, isn't there like an "electric music for dummies" book out there or something that will explain basic midi/ synth terms in English and not computer language?

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Keysrage X