Well... I'm not the first, but I just made my own! Two years ago, I had an idea of making a guitar play bass lines at the same time so I can jam with my son who was learning to play drums at the time. It was boring jamming without a bass player. I came up with a rough first version of it early last year. I'm not really an electronic person but through another forum friend'st ech advice, we have come up with a 2nd and final version. I now call the guitar, "Gemini". Bass sound is on the left channel, guitar is on right channel. The guitar is a Yamaha EG112C2. It has 2 circuits. The first circuit is for the normal guitar with its own volume pot. It has no tone control and goes to the output jack. It has a GM Railbucker bridge and a Fleor single coil sized rail humbucker with 5-way switching. The second circuit is for the middle pickup which was replaced with a 2-pole pickup that only picks up the 5th and 6th strings. It also has its own volume pot with no tone control and also goes to its own output jack. The signal is being fed to a Digitech Drop to convert it to a lower octave sound to simulate a bass. Gear used: Boss GT-100 for guitar effects Digitech Drop as octave pedal Behringer BDI21 Bass Amp Modeler Behringer UMC204HD interface DAW: Audacity The gear: It has crappy tuners right now. I would like to change it in the future. I am looking at changing the nut also. Thanks for viewing!