Yamaha SFG05

FM sound synthesizer unit II

Yamaha SFG05 MSX FM sound synthesizer unit

1985 (Jun.)
Initially sold for ¥29,800

The Yamaha SFG-05 (or SFGII) is an FM tone generator unit that plugs into the slide slot of an MSX computer. When used with a Yamaha Music Keyboard (YK-01, YK-10, YK-20) or MIDI keyboard, it transforms your MSX into a digital synthesizer with wide possibilities. Updated version of the SFG01 previously available on early MSX computers.


  • Play a solo voice with rhythm and Auto Bass Chord accompaniment.
  • Play up to 8 notes polyphonically with 1 or 2 voices (4 voices if you use a MIDI keyboard).
  • Real time recording and playback of up to 1800 notes. (You can play chords too).
  • Connect to an external MIDI sequencer or rhythm machine and use as a 4-voice, 2-note MIDI tone generator. You can set MIDI reception channels independently for each voice.
  • By using the YRM15 (101) Music Composer software, you can play up to 8 different voices simultaneously.
  • Yamaha music software YRM 101~104 will run with no problems on the new SFG. However, the playback tempo for the Music Composer (YRM15 / 101) and Music Macro (YRM11 / 104) may be a bit slower than if used with the SFG01 (built-in FM Tone Generator of the CX5M).
Yamaha SFG05 advertisement
Yamaha SFG05 advertisement
Yamaha SFG05 demonstration at Microcomputer Show 1985 in Osaka
Yamaha SFG05 demonstration at Microcomputer Show 1985 in Osaka