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Lexicon PCM 80 Version 1.10 MIDI Implementation Details
Appendix B: MIDI Bank assignments
Effects in the PCM 80 are accessed by Bank and Program numbers. Banks are assigned as follows:
Bank 0-3 Internal presets (Displayed as P0-P3)
Bank 4 User generated effects (Displayed as R)
Bank 5-9 Extension presets. Presets are loaded  into these banks from algorithm cards.
(Displayed as X0-X4)
Bank 10- Card banks, either user generated or preset, depending on card type. Displayed as
C0, C1, etc. Bank numbers above 9 are displayed alphabetically, beginning with
CA.
Program numbers range from 0-49. Numbers greater than 49 are ignored. The exception is mapped mode
in which a program number (0-127) is used to look up a bank/program combination from a table.