Circuit Bent Casio SA-2 // Full Overview // Gleix devices

A classic for circuit bending. First SA-2 I've picked up in a few years.
- Hard on/off switch
- 1/8” audio output jack
- Internal speaker on/off
- Squealing feedback/distortion knob with on/off
- Squealing feedback/distortion optic theremin with on/off
- CV input for feedback/distortion (not pictured above, added after photos - check the demo video)
- Glitch button, variation knob
- Noisy tonal distortion on/off
- Kick, Hi-Hat, Snare trigger buttons
- CV/Gate trigger inputs for kick, snare, hi-hat
- Two blue LEDs, lightly pulse to the audio
- Switch to enable access to 100 casio tones (only 44 available with stock buttons)
0:00 - Intro
0:35 - Basic features
1:10 - Feedback/distortion knob, optic-theremin
2:30 - Drum triggers
2:45 - Glitch trigger
3:50 - Additional buzzy distortion
4:15 - Hidden features switch
5:35 - CV/Gate integration
7:11 - Outro
This device is ̶f̶o̶r̶ ̶s̶a̶l̶e̶ sold.
Schematics available @ www.gleix.net/schematics
August, 2020
Similar devices can be commissioned and custom built - feel free to reach out via my website.
www.gleix.net
/ gleix
#circuitbending #circuitbent #gleixdevices #gleix

[@MirlitronOne]

Wot, no voltage starve?

[@creamydistortion]

This is badass!! I studied electronics many years ago, but never found a good job in the USA. I still remember the basics... You've inspired me to get back into it as a hobby.

[@PhoenixPerryisawesome]

Thank you for sharing your hacks! I have an SA-2 I have been meaning to hack for *years* and this is a nice update of the one I have saved from Casper Electronics wayyyyy back in the day. Love the add ons!

[@TRIPFORM]

Just purchased this for our band! Looking forward to the assimilation of this creation into our rig!

[@andrewcoltrane9850]

I'D BUY THAT...SUCH KILLER SOUND

[@spkoftdvl]

This instrument on a live darksynth project would be so epic. That distorted synth 😍

[@stylinghead]

Beautiful. I’ve bent a few way back when but you are next level goodness. I didn’t upvote you because you are currently at 666 but I did subscribe. Thank you.

[@leovonfitzy]

Really impessed with this build!! What an awsome job you did! The tone bank unlocking switch is a definite wow moment for me! Regards!

[@SloppyLarry]

This is the best circuit bent keyboard I have heard!

[@RetroPlus]

So cool, absolutely love the distortion!

[@Bennythejet1974]

Many thanks for your schematics on this. Found one for £3 today. Can’t wait to open it up

[@ouchcubic]

YOU ARE A GENIUS OF LOVE WITH A SOLDERING PEN. !!! BRAVO!! amazingly functional utility and mayhem

[@mikeprice25]

5:18 - I'll have one Travis Scott meal please

[@mattildahubbardo]

thanks. just bought this keyboard and having a hard time using it so i will try the setting you said with the big knob.

[@weldinghand]

Great work man! Was really interesting to watch! :)

[@LizzardHimself]

So awesome! I just stumbled across this vid (awesome mod btw), looked at your website and realized that you sent me the schematics for a Hing Hon EK-001 like... 15 years ago? Glad to see that you are still at it. :)

[@noystoise]

Excellent!!

[@prismstatistic]

nice bend!

[@jensmarder1913]

Very Nice😊👍

[@outbacklover]

Wow this is so cool😅

[@horvathgergely452]

man this is fucking amazing, good job

[@peachysick4212]

wow cool

[@glauciogv5225]

Very interesting ! I have an old SA-3 that now...well...will pass by a small "surgery"...hehehe

[@gleix_]

The SA-3 isn't too common! Use precision tools if you insist :) This has me taking a quick look at the SA-3 online because I never actually ran into any in the past. It looks essentially identical to the Casio SA-8, other than the fact that it has a white colored variant as well as a black one. I don't... understand what the purpose of it is/what makes it any different from the SA-8. Anywho, good luck!

[@glauciogv5225]

@@gleix_ 👍

[@kalin6789]

Hey this is awesome - love your work! Do you think it's possible to make drum triggers on a PT-87? I'd be grateful for any advice on how to experiment with making this happen :)

[@jakejonas7366]

Fucking rad dude. You earned this sub!

[@dymardo_]

First of all, that's super impressive work. Great job! I have two mini synths but my SA-2 is broken. I got it at the flea market a few months ago and it worked for some time, but now I can't seem to turn it on. I tried soldering a USB cable to the battery pins to power off 5V but it won't turn on. I do want to resurrect it because it's got two key polyphony unlike my PT-1. Maybe it's worth installing a permanent switch like you did to bypass the failing slider?

[@1001Media.]

genial!!

[@victorbustos596]

what a good job, congratulations. very interesting the modification of cv to control the percussions (bass drum, hi hat and snare). Would you be kind enough to share these schemes? greetings in advance.

[@simon6524]

Great work! Thank you for your clean documentation. How did you manage the cv-in Jacks for the drums? Ive heard about Transistors or analoge Switch ics. I'm very interested about your solution. Keep on🌊🌀🌀🌊

[@JeremyGreysmark]

Thank you for your detailed video! I have got an SA-2 lying around, and those mods seem quite useful to me :). I found your schematics on your website, but how do you wire in those CV inputs? is ist just parallel to the buttons?

[@gleix_]

IIRC it *will* trigger if you wire up directly to the button contacts with tip>common and gnd>trigger point, but it ends up triggering when the trigger goes low instead of high which can be fixed with a little transistor circuit or a hex inverter. Something like a vactrol, opto-coupler, or maybe a switch/trigger IC would work - I think I went the vactrol route on this one. Some methods will be more reliable than others, and some will allow higher speeds than others as well, but there are a few different ways to approach it.

[@user-mu9gh3go7p]

SICKO MODE

[@michaelrowe5118]

Beautiful work and very inspiring! I would love figure out CV for my next project. Also, how do you paint your keys? Do all the keys have to be removed separately? I'm so nervous to disassemble the keys and have a million pieces come flying out and not be able to get them back together!

[@gleix_]

Keys on most small keyboards come out in large pieces - all of the white keys are a single piece, and all of the black keys are a single piece. Makes it fairly quick and easy to paint them each separately, but I'd recommend putting down a layer of clear coat to avoid scratching and whatnot afterward. CV is sort of different depending on the use case - the easiest ways to implement CV on most things would be by using a vacrol or an opto-coupler. ie. feed your 5v signal into the opto coupler and have the other end close the gap on the points you'd like triggered. I believe I used that method for the drum triggers on this machine, but used a vactrol for the feedback/distortion.

[@michaelrowe5118]

@@gleix_ Good to know about the keys - looking forward to painting on my next project. Also - good advice on the CV approach, thanks!

[@user-eg4zk5ko3o]

thats fucking dope

[@Signorellielli]

WAW VOICE MODE!!

[@ckngmad1357]

01:41 Best part

[@kevinbirge2130]

What do you charge for these?

[@iteachvader]

Were the samples from this used for K.K. Slider songs in Animal Crossing?!

[@FigureFarter]

Yes they are, the beginning is the brass symphony used in K.K. Ska

[@dikuf]

Hi, do you know how to mod it to get more than 2 key polyphony?

[@seanjunior6233]

3:17 I hear the sound when you lose in baldi 's basics

[@imnotbeluga007]

3:26

[@roysteel1701]

Got an old Yamaha synth,can I circuitbend this?

[@Signorellielli]

Waw Voice is the best casio sound. I'll take the hate you guys know I'm right.

[@adoraquodincendisti]

Awesome! Which distortion did you use? Is that a specific board?

[@gleix_]

It's actually a simple point-to-point bend on the SA-2's board; I've got a schematic for the SA-2 on my website :)

[@kollasuranna1548]

Where can I buy it

[@calibomber209]

How much to pimp my sk-8?

[@bsant7]

have you done this to an sa35?

[@gleix_]

I haven't fooled with the double digit SA models since I like the smaller ones, but I believe the internals are fairly similar - they should use the same OKI chip which is where some of the interesting glitches are, and the method of getting that distorted feedback should be the same as well.

[@doranomeara5466]

jerma?

[@by.daekeryyy]

Hi! im disposed to pay you hahahahahha if you design a circuit bending schematic for a Casio mt 540. Not a joke, im seriously

[@twiff3rino28]

Japanese chips are weird.

[@user-zh2wl2sl2u]

Well every chip will act weird if you mess with its function and cause random bits to flip

[@TheCloudek]

Amazing. Keep going and seek God, only He can fill the internal voids and give us true happiness and peace. He loves you. God bless you all and your families. Read, please: 2 Corinthians 5:17. Romans 10:8-13.