I finally completed my XGM / VGM player that i started more than 1 year ago 
It's still not perfect, has some bugs (refresh, playback issues with fast tempo...) but i am happy enough with it's current state so i think it can be released
XGM player is intended to play XGM music through the XGM driver i developed for Sega Megadrive. I developed a tool to convert Megadrive VGM file into XGM format so you can basically see the XGM player as a Megadrive VGM player... This tool is called xgmtool which is part of SGDK, you can also use it to optimize your Megadrive VGM files (and it does a very good job here compared to others tools).
The main difference between VGM and XGM is that XGM allows to play up to 4 PCM at same time where classic Megadrive VGM is limited to 1 PCM channel only... that is an handy feature for game where you can play several SFX at same time through PCM channels, it can be used for richer music as well but currently no tracker support the XGM format.
Another interesting part is that XGM format is optimized for Megadrive sound hardware so files are generally 25% smaller than optimized VGM.
Currently i only provide a test rom to introduce the XGM player capabilities, and for that what better than a Technosoft compilation
Musics from the following games are included in the rom :
- Dragon's Fury
- Elemental Master
- Thunder Force 2/3/4
Because of rom size limitation i could not include all tracks so i made a (personal) selection of 80 tracks.
You can download the rom here: https://t.co/xwc9cumECg
Later i will try to provide a tool allowing you to produce your own rom from a selection of VGM file
Small animation showing the XGM player in action: https://pbs.twimg.com/tweet_video/CnHGA82WIAAuo9B.mp4
