Pickup Driver?

[Grant Richter]

Another cute trick is to cut the cone and spider off a speaker and
use bathtub caulk to glue a slide to it. The output of the guitar
drives the speaker and the slide puts the vibration back into
the strings for feedback. Very hard to control though, more
Stockhausen than Fripp.

We also took guitar pickups and put them all across
a piano sound board, then put speakers underneath
with a brick on the sustain pedal and fed back the
entire piano harp. We had to pull the plug and get
the hell out of the room cause I thought the whole
thing was gonna blow up! Very scary! The most
monstrous noise I have ever heard, like demons growling.
Took 20 minutes to die down.

Don't try this at home! With the number of tons
of force on a piano harp, with enough sympathetic
resonance it's possible it could explode and kill
somebody.

----------
> From: Curtin, Steven D (Steven) <sdcurtin at lucent.com>
> To: synth-diy at mailhost.bpa.nl; 'Bob Gonsalves' <pinknoiz at pinknoiz.com>
> Subject: Pickup Driver?
> Date: Friday, December 03, 1999 2:04 PM
> 
> Hi Bob -
> 
> You're probably right, there's not enough magnet to do that.  One person
who
> has driven individual strings with magnets is Nicolas Collins, and he has
> been building other projects with "backwards guitar" for a while.  This
is
> the idea that the pickup drives the strings instead of the other way
around.
> The one guitar of Collins' I saw that did this had big solenoid megnets
> mounted above the strings rather than under them.
> 
> I have a two-pickup guitar I'd like to modify to do this with one of the
> pickups- what kind of amp chip would people recommend to do this?  This
is
> also how the Fernandes and Sustainiac systems work, as well as the
"Infinite
> Guitar" circuit designed and used by Micheal Brook.
> 
> Steve C
> 
> -----------------------------------------------------------------
> Steven Curtin  
> Lucent Technologies Microelectronics
> ph: (732)949-4404   fax: (732)949-6711
> http://www.emf.org/subscribers/curtin/
> sdcurtin at lucent.com
> -----------------------------------------------------------------
> 
> > ----------
> > From: 	Bob Gonsalves[SMTP:pinknoiz at pinknoiz.com]
> > Sent: 	Friday, December 03, 1999 2:22 PM
> > To: 	synth-diy at mailhost.bpa.nl
> > Subject: 	Re: Cool Item ALERT (guitar oriented)
> > 
> > [re: Gvox guitar/computer interface]
> > 
> > >yes Guitar Center is in the USA, and the price is at local stores.
They
> > have
> > >musiciansfriend.com who they are affiliated with, but the price is 
> > >higher on the
> > >net (like $99 - too high) You might try contacting them at 
> > >guitarcenter.com and
> > >talking them into selling you one...
> > 
> > 
> > I picked up one of these too. Thanks for bringing it to our attention.
> > 
> > I wonder if it would be possible to _drive_ the strings with this 
> > thing. Probably not - it doesn't look like there's much metal  in the 
> > pickup.
> > 
> > 
> > Bob Gonsalves, Research Director, Pink Noise Studios
> > Art*Technology*Politics  http://www.pinknoiz.com/
> >