[Fwd: Re: biofeedback]/ theremin

[Peter Blackett]

Hi,
just one safety point .
If your going to be experimenting with any direct electronic connections
to your body then please either
1. use battery powere equipment with built in amplifiers [ so no mains
connectors ].
or 
2 make sure that there is good isolation between the signal electrodes
that connect to your body and the rest of the circuits.....
I think you could use opto isolators or transformers to provide the
isolation .
But it might be possible to make a Theremin type device that would be
safe and not too dificult to control .
I think the changes in skin resistance / nerve signals are small
compaired to the background noise , so some filtering would be needed .
regards for the new year also ....
Peter 
South London England  

-------- Original Message --------
Subject: Re: biofeedback
Date: Tue, 2 Jan 2001 20:06:49 +0100
From: Torbjörn Hörnfeldt <torbjorn.hornfeldt at telia.com>
To: <synth-diy at node12b53.a2000.nl>, "Dave Krooshof" <krooshof at xs4all.nl>
References: <l03110706b676a77ebf23@[194.109.165.97]>
<l03110706b676a77ebf23@[194.109.165.97]>
<l0311070db676d554877b@[194.109.164.133]>

Nice seeing Michel Waisvisz being mentioned on the list. After looking
at
the web-site I am a bit confused though. I remember the Cracklebox as
having pots as well as touch surfaces. (This is from some issue of the
STEIM
publication which I subscribed to at the time.) Must have been something
else though. Anyone who has a clue?

Torbjörn


----- Original Message ----- 
From: "Dave Krooshof" <krooshof at xs4all.nl>
To: <synth-diy at node12b53.a2000.nl>
Sent: Tuesday, January 02, 2001 2:05 AM
Subject: Re: biofeedback


<snip>

> I am, however, very much interested in brain-electronics contact.
> Now it's still one way for me, as in playing my open synths by toughing the
> boards of the electronics. (http://www.xs4all.nl/~mwais got me into this)
> If the resistance of the skin is this high, yet can do so much interesting
> stuff, it must really interesting to use the muscle or even nerve
> electronics, as that is more active control.
> Touching electronics gives me the feeling I control the actual process,
> rather then just triggering it. (compare bow vs. plucking strings). Pushing
> the electronics by thought must be a fantastic experience.
> 
> 
> Dave
> 
> 
> 
> 
> 
> 
> 
> --------------------------------------------
> Dave Krooshof http://www.xs4all.nl/~krooshof
> geluidstechnicus @ http://www.ahk.nl/the/theatertechniek_ov.html
> webmaster: http://www.popronde.nl
> 
>