A new version of SCMD, the multichannel PCM and multichip soundplayer for MSX has been released. In this release, a bug that occurred when writing to OPLL registers whilst changing the pitch of a tone was fixed.
The SCMD player allows you to play multiple samples on one or even two SCC cartridges at the same time, which is similar to playing MOD-files. SCMD also supports 'ordinary' sound playback on PSG, MSX-MUSIC and SCC. Several mp3 files of the results can be heard on this website. A special MML compiler to support this functionality is available on the SCMD website as well. More SCMD music can be found over here.
Relevant link: SCMD website