I downloaded the Jones in the fast lane SCUMM (DOS CD)zip file that is currently available here https://www.google.com/amp/m.emupara...hp%3fgid=95873 and realized that both the speech and midi music don't work.
This is because zip file contains the files from the CD however the original CD had an audio track that is not included. Also you need the MT-32 control and pcm room files in the directory for MT-32 emulation in SCUMMVM
I have a copy of the original CD and ripped the audio track as as a flac file and named it track1.flac so SCUMM can use it for the speech in the game if you check the use CD audio option in the SCUMM configuration for the game.
My copy also has all the driver files so you can select windows instead of dos in SCUMM VM and MT-32 emulation mode will work as I can include the necessary room files as well if there is a way I can submit my copy as an upload.