need "Control" and "PCM" ROM images. These files contain the original code and sound samples used by the physical hardware. Without them, an emulator is just an empty shell, unable to process the MIDI data from classic games like Monkey Island Ultima VII Sourcing and Compatibility
MUNT can run with a that produces generic MIDI sound, but it won’t sound like a real MT-32. The original ROMs are required for authentic game music. mt-32 rom download