Casio SA series line output

[iwillbeacircuitbender]

OK, so I have a Casio SA-67 that I would like to install a line output jack on
Is there a good way to do it?

[Ciderfeks]

Hi IWBACB,

I'm not familiar with the SA-67, but I assume it has a built-in speaker and the diagram below (taken from Reed Ghazala's excellent book 'Circuit Bending: How to Build Your own Alien Instruments') gives you a general overview of how to go about it.

There's a slightly more complex version on the equally excellent Casper Electronics website - sadly on a hiatus atm but thankfully still available in an archive here:
https://web.archive.org/web/20161013223851/http://casperelectronics.com/images/finishedpieces/Circuit%20Bending%20Tutorial/pete-class.jpg

Hope that helps!

[iwillbeacircuitbender]

OK, and as for the crash switch, where would I wire that to?

[Ciderfeks]

Not sure if it would be exactly the same for the SA-67, but there's some great SA-xx tutorials with diagrams (including the crash mod) over at the old Casper site. I'd start by looking for similarities with your board and go from there.

https://web.archive.org/web/20170208135441/http://casperelectronics.com:80/finished-pieces/casio-sa-keyboards/

There are also some other useful tutorials to get you started on other projects too:
https://web.archive.org/web/20161014014841/http://casperelectronics.com/finished-pieces/circuit-bending-tutorial/

[iwillbeacircuitbender]

OK. And tablehooters states that the SA-65/SA-67 have empty solder holes for a line output to be inserted