MPU 232 - MIDI Out on RS232 / Serial port.. - YouTube
www.frankwillems.com
FT232RL USB TO MINI DIN 8P MD8 ADAPTER RS232 SERIAL CABLE FOR KORG X5(D) MIDI MUSIC SYNTHESIZER TO HOST PORT AG-001 FOR PC (FT232RL CHIP) Cable length:3m - Newegg.com
Accepting MIDI Serial Input with the Netduino - Pete Brown's 10rem.net
Wintergalen Elektronik - rs232-midi-konverter-wgp64
Amazon.com: DecaBox MIDI to RS232 Bidirectional Converter : Musical Instruments
MIDI / RS-232 Converter
AppleBox - adapting MIDI to RS232 DIY
Decabox: Bidirectional MIDI to RS-232 – Engineering Solutions Inc