CMOS Robotic Voice?! (Pseudo-Vocoder sceheme)

VanaVara · Joined: Jan 30, 2012 Posts: 23 Location: Vilnius

Hello,

I have found a little scheme of some kind of filter which acts like a very primitive vocoder on this german site: http://www.floka.com/cmos/cmossounds.html
I was wondering if anyone could help me with a stripboard of this baby?
It looks like it's quite interesting super lo-fi thing to play with;)

Thank you in advance!

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Cynosure · Posted: Mon Mar 18, 2013 7:04 pm Post subject:

It looks like it isn't actually a vocoder. It is a linear amp to boost the mic, and then a switch that toggles that sound off and on at a fast rate. It will be something similar to speaking into a fan.

I have experimented with using a 4066 to toggle a sound source in a similar fashion. The switch is very audible.

I was able to minimize the switch noise by using a transistor instead, but the best thing to use would be a VCA.

Psyingo · Joined: Jun 11, 2009 Posts: 248 Location: Canada

if by robot you mean dalek, and if by dalek you mean ring mod, and if by ring mod you mean amplitude modulation and if by amplitude modulation you mean square wave amplitude modulation... then yes, this is a robotic voice. it will sound ok build it and find out... as for stipboard... sorry. try it on your own.

bubzy · Posted: Wed Mar 20, 2013 12:08 am Post subject:

wouldn't it be easier to use a fet instead of the 4066?

diablojoy · Posted: Wed Mar 20, 2013 2:01 pm Post subject: