FM channels + 5 FM drums 6 four-operator FM channels + 3 two-operator FM channels + 5 FM drums Four-operator FM allows for more complex sounds but reduces polyphony. Eight waveforms are available for the FM synthesis portion: Sine Half-sine Absolute-sine Quarter-sine (pseudo-sawtooth) Alternaing-sine "Camel" sine Square Logarithmic sawtooth The Moonsound audio's power supply is isolated from its digital supply in an attempt to reduce noise. It has a separate stereo audio output as it is not mixed with the internal MSX sound. Software Moonblaster is a software designed by Remco Schrijvers based on his time-step sequencer software for other MSX sound cards. Moonblaster came in two versions, one for FM and one for sample-based synthesis. Later on, Marcel Delorme took over the software development. As most developers were active in gaming software, many game companies such as Sunrise (in the Netherlands) developed and composed music specifically for Moonsound. List of software for the Moonsound: Moonblaster for Moonsound FM Moonblaster for Moonsound Wave Moonsofts Amiga MOD file player for Moonsound Mid2opl4 midi file player for Moonsound Meridian SMF MIDI file player MoonDriver MML (Music Macro Language) compiler Additional software tools were able to rip sound loops digitally from audio CDs inserted in a CD-ROM drive connected to any of the SCSI and ATA-IDE interfaces. This software was designed by Henrik Gilvad for MSX Club Gouda and Sunrise Swiss. The Moonsound has been emulated in MSX emulators such as blueMSX and openMSX. See also Chiptune References External links The Ultimate MSX FAQ - Moonsound Meridian software OPL4 data sheet Moonsound D/A Converter spec Moonsound release story Tilburg 1995 Audio examples from Moonsound in MP3 format (not all examples are purely made with Moonsound) MSX Sound cards