OKAY 2 Synth by oskitone Jan 18, 2018

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OKAY 2 Synth by oskitone is licensed under the Creative Commons - Attribution license.

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Summary

https://vimeo.com/250683009

Oh, nothing fancy, just an analog square wave synthesizer -- That's OKAY... 2!

This is like the original OKAY but sports two octave of keys and an 1/4" audio out jack.

Monophonic: Only one note at a time can be played. This is opposed to “polyphonic,” where multiple simultaneous notes can be played.
Analog: There are no computers, microcontrollers, sound samplers, or anything digital involved. The sound you hear is the sound of a speaker being abused by discrete electronic components like capacitors and resistors and logic chips.
Square-wave: When its output is viewed on an oscilloscope, its wave resembles a square. It’s a “hard” sounding wave type, great for bass lines, and commonly associated with chiptune music and old video games.

These are the 3D models for the OKAY 2 Synth DIY Kit. Read more about it here and purchase the electronics parts at http://www.oskitone.com/product/okay-2-synth-diy-kit.

Differences from OKAY 1: more keys, keys and key bed PCBs mounted to internal cradle piece, no key plungers, audio out jack

Advice

The enclosure models are pretty big and are prone to warping. Minimize that risk by using a filament with low shrinkage like PLA and ensuring very good bed adhesion.

Updates

2018-02-13: improved keyboard cantilever bond for Cura slicer (now keys-2.stl)

Post-Printing

Slicing guide and final assembly information is available at http://www.oskitone.com/guides.

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Coolverine

4 days ago

Nice design, would you share what software you used to make this? thanks

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oskitone - in reply to Coolverine

3 days ago

Thanks! OpenSCAD

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Coolverine - in reply to oskitone

2 days ago

Thanks for the reply, I had not heard of this software, will be taking a look at it. Hopefully I will be printing this synth soon as well.

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sideshowberto

Apr 13, 2018

This project brings me back to my single digit years when i was most ignorant to reality...the small piano circuits in soft plastic cover...hold in between hands press with fingers, ole macdonald had a farm, iaiaooooo....man so much peace and tranquility looking at this post...one day ill get the mods and build one with this shell

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Firepotamus

Apr 11, 2018

how do i print this on a 200x 200 printbed?? could you cut the model in half so i can glue it togather?? Thanks for posting this design it is realy amazing quality and i've been waiting for one of these for a while.

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oskitone - in reply to Firepotamus

Apr 12, 2018

I wouldn't recommend cutting it in half. There isn't enough contact area for glue.

Check out the original, one octave OKAY. Maybe this will fit on your print bed? https://www.thingiverse.com/thing:2556995/

OKAY Synth

by oskitone

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Mcstarcoin

Apr 11, 2018

I want to make one of these! But where do I get the parts? Your post isn't very clear about what parts you need, but it looks awsome!

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oskitone - in reply to Mcstarcoin

Apr 11, 2018

Hi, thanks!

I've just updated the description to be clearer about where to buy the parts. Thanks for the recommendation.

(It's here, btw: http://www.oskitone.com/product/okay-2-synth-diy-kit)

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newbpwnr

Apr 11, 2018

If i didn't already have too many synths i would do this in a heartbeat :)

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Devine

Apr 10, 2018

Love this design just wish electronics kit had a better price point, like at least 1/2 would be the only way this makes any sense.

Great design, well made !

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dillonj98 - in reply to Devine

Apr 11, 2018

I agree, I was really interested in the project, but on a tight college budget, $50+ is a bit much for something like this.

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oskitone - in reply to dillonj98

Apr 11, 2018

Hi, thanks for this feedback.

I'm hoping to get the price down in the future, but for now, at the small scale that I'm at (I'm just one guy, running this out of my house), this is as low as I can do.

Stay tuned though. I'll have projects in the future with fewer PCBs and parts, thus lower cost.

-Tommy

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