New features/changes
MPU-401 simultaneous with all modes
MPU-401 emulation is now available in all modes. This can enable simultaneous digital sound effects in SB or GUS modes with MIDI output. If you have another MPU-401 card in the system, to prevent conflicts this can be disabled or moved to a different port with the /mpuport option to pgusinit.
The original MPU mode is still available for titles that require MPU interrupts (titles on this list marked with a 1 require MPU interrupts).