I was intrigued by this posting on eBay:

https://www.ebay.com.au/itm/Acoustic...EAAOSwUlxaFqL2

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I was thinking this might be better employed on an electric guitar. It comes with a piezo acoustic pickup and the preamp has a very high input impedance so it should work with magnetic pickups (or I can make it work). I'm already working on some serious onboard electronics for my ST-1L, including low-latency bluetooth, and on-board MP3 player for backing tracks, but if these things are any good, they could save an awful lot of work, and it would look damned impressive :-)

Has anybody actually used one of these? If not I might take a punt on one.