[sdiy-interim] MIDI guitar, the hard way

[harrybissell at copper.net]

not exactly. The current runs down the string and into
the fret, which is grounded. The idea is that the first
position that is grounded will get the lion's share of the
current and the secondary points (having more contact resistance)
will get a divided flow, less than the best contact.

I think Roland was 'building a fence' arounf their guitar synth
patent... trying to stop any possible workarounds.

In practice the system might work... otoh putting a current on
the string of any appreciable amount will make it hot, possibly
a shock hazard... and for sure it will make a click in your magnetic
pickups.

Do not try to use a DC current in the strings to directly induce a 
voltage in an iron core coil (no magnets)... its not practical  :^)
(I tried it)

H^) harry


>
>
>---- Original Message ----
>From: profpep at hotmail.com
>To: synth-diy at vermine.org
>Subject: Re: [sdiy-interim] MIDI guitar, the hard way
>Date: Mon, 26 Mar 2007 18:17:23 +0100
>
>>> So you're saying instead of the string motion inducing a current
>in the
>>> pickup, a current is induced in the string, and this current flows
>in
>>> series through a transformer?  Sounds cool.
>>
>>That's it. You need a ribbon mic transformer though, becasue a
>rivbbon mic
>>works the same way, and has a primary impedence of << 1 Ohm.
>>
>>Back in the days, there were loads of 'dead' old reslo ribbon mics
>around. I
>>think there are still ribbom mics made by Beyer.
>>
>>FFW another  use for the old Reslo was to deliberately  abuse is as
>a bass
>>drum mic. The wavefront from the drum head would be enough to 'snap'
>the
>>ribbon tight, adding extra punch to the drum sound.  These days
>better
>>achieved with some outboard electronics!
>>
>>Mike
>>
>>
>>____________________________________________________________________
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>y



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