| I believe you can get 7-string piezo MIDI systems from GraphTech and RMC. The problem isn't so much the pickup: All of the guitar-to-MIDI converters are only designed for six strings. So even if you get a seven-string pickup, you need to figure out how to translate all seven strings into MIDI signals.
One option might be to tune your seventh string to A and have it just track in parallel to the fifth string. |