12 String guitar effect

Things to try:
- Apply a chorus effect
- Duplicate the track and shift it to the right by a tiny fraction of a second
- Transpose the duplicate track by an octave

None of these will probaby give you a true 12-string effect (since the upper two strings of a real 12-string don't transpose), but with a little bit of mixing it might sound quite okay ...

(Man, this is one of the days where I give my 2 ¢ to almost anything ... maybe someone has really tried it?)

I suppose there might be a plug somewhere, but I haven't heard of it. I know some of the modeling amps have 12 string modeling in them, so it is possible as a plug.
What I have done is to do it manually. I play the part normally, then on a new track, I play most of it an octave higher, but if you really want a true 12 string sound, you have take note (no pun) of which notes are played on the high E and B strings, and make sure those notes are NOT octave, but instead just doubled, since those 2 strings are doubled and not octaves on a real 12 string. Using the same guitar and the same setting, panned the same, so it sounds like one instrument, and it sounds pretty good.

If you can afford to spend US$500 you ought to go to a music store and check out the Line 6 Variax guitars.

They use physical modeling technology built into a computer inside the guitar which transforms the basic 6-string electric sound into a huge variety of mostly-convincing emulations of acoustic guitars, twelve string guitars, and more.

Then if you have a signal splitter so you can send 2 signals of your guitar to the computer, on one side you can do what you already do, and maybe try the vocal transformer plugin for male to female on your guitar in the other channel. No idea what that will sound like, but it should give you an octave higher. 🙂

How are you getting input to the computer? I have a USB interface, and if I were going to do that, I also have an old stereo analog delay stompbox that has 2 outputs, so you can use 2 separate amps, I guess. I'd take one line out of each of those to each of the 2 inputs on my Tascam US-122, and assign them to channel one mono, and channel two mono.