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Casio SK-1 Circuitbent Sampling Keyboard

Casio SK-1 Circuitbent Sampling Keyboard

Brand: Roland

Regular price £195.00 GBP | Inc.VAT: £234.00 GBP
Regular price Sale price £195.00 GBP
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Auction for a circuitbent SK1. In very good condition, working well, sounding crazy.

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Product Description

This was the first circuitbent SK-1 Tony got hold of. It doesn't have all the features of the ones from Circuitbenders, however it still has plenty of the glitchy, crunchy, lofi magic. Whether you're sampling or just messing with the onboard rhythms and sounds there's so much crazy inspiration in this compact little synth. The immensity of the sounds this diminutive frankensynth creates is simply astonishing. Punches way above its weight. A source of constant joy!

The video below is a quick demo of another unit with different mods, but gives you an idea of what can happen, as is this more involved demo from Tony on instagram.

Requires a 7.5v centre negative power adaptor for use, or 5 AA type batteries (not included).

No warranty on this auction item.



Below are the notes from Circuitbenders (who did not bend this unit) but which give some indication of what's possible.

WARNING: As with any circuitbent machine this unit may appear to lock up or crash on occasions. Don’t panic, these machines are operating way outside of their designed tolerances so sometimes crashes can be a common occurrence. If the machine won’t respond first try pressing and holding the soft reset (red) button on the side for a few seconds. Many times this will get the machine working again without having to turn it off and loosing and samples in memory. If the reset fails turn the machine on and off using the power switch or just unplug your power adapter. Usually if the machine gets locked playing one note you can stop it by pressing down more than four keys thus forcing it to run out of polyphony.


The patchbay consists of 24 x RCA phono sockets. You can make as many connections as you want between any jack sockets with standard phono cables. Each connection will produce a different effect but using too many connections at any one time may cause the machine to crash.
As some connections will disable the keyboard to some extent, it is often useful to make a connection after you play a note, or set a sample looping with the loop function, and then hold a note while trying different patchbay connections, rather than playing notes with patchbay links already connected.
We would not advise inputting any external signal into patchbay sockets from any other source. The main advice we can give is to experiment. There may be a lot of features available on this machine that we have yet to discover.



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  • Most of Europe: £36

  • USA: £85

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In excellent condition with normal wear. Please see photos or get in touch if you require more information on condition.

Voltage Information

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This auction item will have 20% VAT added to the final price for UK buyers. Buyers elsewhere may incur VAT or other local taxes on import.

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