Today I am planning to add WavePi support to my Mobio NX MB12C/UV. We'll see how it goes. Pi Zero W will sit in excess hard drive space left by CF card. WavePi is a group of scripts for using apps which support midi playback through ttymidi (emulates a midi uart through a uart). Supports sf2 soundfonts, etc. Controllable by SYSEX messages. Basically it will give DOOM and other games orchestral music through a raspberry pi. https://github.com/t9999clint/WavePi. Nobody has done this with WavePi - it's planned as a SoundBlaster (old sound card) WaveBlaster (old wavetable card) addon.

Tiny Laptop:

ES1869 sound chip (true MPU-401!):

WavePi GitHub:
https://github.com/t9999clint/WavePi/tree/master/scripts

WavePi here on Vogons:
WavePi: Use Raspberry pi (2/3/4) as a AIO MIDI synth