I did this on stage as well with faith & disease using a VG-8.  While it wasn't as horrible as pitch shifting it left a lot to be desired. 

On Dec 4, 2007 5:08 PM, Miguel M < therevoltingx@gmail.com> wrote:
I think that's about as realistic to a real sounding bass as you can
get.
A midi controlled bass instrument will not give you the same sound as a
real guitar.  (Hammer Ons, Pull Offs, Mutes, etc)  Of course this
wouldn't be done for professional audio, but it could be used to have a
nice practice session.

On Tue, 2007-12-04 at 14:17 -1000, david wrote:
> Rob wrote:
> > On Tuesday 04 December 2007 18:40, Matthias Schönborn wrote:
> >> Am Dienstag 04 Dezember 2007 21:15:43 schrieb Miguel M:
> >>> Hmm, if you want a realistic sounding bass I would suggest
> >>> plugging in your guitar to jack-rack (or some similar effects
> >>> program) and use a pitch shifter to shift the pitch down by 50%.
> >> I did that - kids, don't try this at home!
> >> (Sounds like everything except a bass ;-) )
> >
> > It can be a pretty cool effect though (same for double speed bass as a
> > lead or rhythm instrument.)  Guess I've listened to too much Mike
> > Oldfield to be offended by that sort of thing ;)
>
> Emerson, Lake and Palmer used to use it live, when Greg Lake needed to
> play guitar and bass in the same song. I think they used an analog
> frequency divider.
>
--
My Website:
http://eckz.zapto.org/eckz/

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