I don't have personal experience, but I found a thread
here with a tutorial (
youtube link).
According to ScummVM's wiki Some games which contain MIDI music data also have improved tracks designed for the MT-32 sound module. ScummVM can now emulate this device, however you must provide original MT-32 ROMs to make it work:
MT32_PCM.ROM - IC21 (512KB) MT32_CONTROL.ROM - IC26 (32KB) and IC27 (32KB), interleaved byte-wise
Place these ROM's in the game directory, in your extrapath, or in the directory where your ScummVM executable resides.
You don't need to specify --native-mt32 with this driver, as it automatically gets turned on.
