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 Forum index » DIY Hardware and Software » Circuit Bending
Bending a casio pt-10
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lorcannnn



Joined: Jun 08, 2013
Posts: 1
Location: Ireland

PostPosted: Sat Jun 08, 2013 11:10 am    Post subject: Bending a casio pt-10 Reply with quote  Mark this post and the followings unread

Hello.
I bought a casio pt-10 on ebay recently. I wasn't planning on bending it much,
maybe just adding a 1/4" jack. I was messing around with it, playing with it and another keyboard and I though it sounded a bit sharp. It turns out it's about a quarter tone sharp. It is very annoying.

Luckily, it is possible to mod the pitch, as seen here.
http://youtu.be/9avV7SrlaI0


There is a schematic here so I think I know which pins to connect.
(I'm guessing the ones labelled pitch extra down?)
Posted Image, might have been reduced in size. Click Image to view fullscreen.


What I would like to know is, what type and value potentiometer should I use? Thank you.
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YamahaPSR6



Joined: Feb 10, 2013
Posts: 23
Location: Greece

PostPosted: Mon Jun 24, 2013 8:43 am    Post subject: Reply with quote  Mark this post and the followings unread

It should be pretty easy to find a pitch mod in there.

experimenting with 1 mega and 470 Kohms pots should give results most of the time.

Normally a bender should have a whole range of pots to find the one that controls best the parameter/sound/effect found.

I dont remember what size I used in my pt-22 bend. probably 1 megaohm

speakers were too fucking loud in my pt 22, so I had to put a speaker mute switch.

Let us know how it went!!
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