Actually, you can make a six string to sound like a twelve string, etc, with a modelling guitar, like the Line 6 Variax Acoustic. Mine emulates the sound of various Gibsons,, Martins, etc when played through an amp. However I think they ceased production due to lack of interest, from which I assume we all prefer to have several different instruments instead, but does that mean we value the hardware, looks and kudos of the instruments more than the actual sound we produce?