M1.XML 20120717 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 20120717 Changelog:
7/17/2012 - 1918 Sets
Changed set raiden -> raidenb due to M1 only supporting playing the
unencrypted sound rom, which is now "raidenb", with raiden also needed
as a parent for the universal "OKI" sample rom.

0.146u3 Data Sync

Download: M1.XML 20120717
Source: Here