Robot voice changer kit found

[Andrew Puls Q-Bot Eye]

---Kyle Jarger  wrote:
>
> Some members were asking about voice changer IC's recently.
> 
> I just got a flyer from Tech America (1-800-877-0072, www.techam.com)
> which has a kit for $9.95 (Part # 990-0147):
> 
> "...this device allows you to adjust three major sound factors: VCO,
VCF, 
> and VCA.  Four pushbutton controls give you the option to add 
> vibrat., raise or lower your voice seven tones (seven up or down) or 
> to sound like a robot."
> 
> I don't know what they mean by the VCO, VCF, VCA; I seriously doubt 
> that this kit is actually a VCO, VCF, and VCA, but for $9.95, it's 
> worth a shot... the main IC on the board looks like a "MT8950A", any 
> one heard of it?
> 
> Regards,
> 
> Kyle Jarger
> jkjelec at tiac.net
> JKJ Electronics
> Visit our MIDI/CV website http://www.tiac.net/users/jkjelec
> 
   I purchased and constructed this kit and it is fun. I don't really
know how it works as I am a novice, but when you plug a guitar into
it, some of the pitch-shifted modes sound like ring modulation.  I
ditched the condenser element and the speaker and put 1/4 inch jacks
in their places.  The robot voice is suprisingly intelligible for such
a cheap circuit.  The only real problem with it as far as recording or
other hi-fi situations go is that it produces a high-pitched ringing
whenever it is turned on (at least mine does) but that can be almost
omited with a little e.q. It has a vibrato mode which can be used with
any of the pitch-shift levels as well as the robot mode.  
    When I read that catalog entry, it didn't really make sense to me
and I don't think it really has all of those things in it (VCO, VCA,
and especially VCF). In fact I don't even know how those three things
would really even apply to this thing.  I was just happy to be able to
get a robot voice and some kind of funny/weird pitch shifter for
cheap. It does indeed sound neat with drums.  It gives a lo-fi/low
sampling rate digital recorded sound to things when it is pitch
shifting or even when you have it set to no shift. 
==
Q-Bot, Andy Puls
q_bot at yahoo.com

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