M1.XML (2013/12/24) is released. M1.XML file for use with M1 - keeping up with changes in MAME. M1 plays the music from arcade games by running the code in the original ROMs (not supplied). This allows entirely authentic playback of classic video game tunes while you work.

M1.XML (2013/12/24) Changelog:
12/24/2013 – 1919 Sets Data Sync to MAME 0.152

Download: M1.XML (2013/12/24)
Source: Here