Archive | February, 2018

Synthchaser #095 – Oberheim OB-Xa Keybed Switch Matrix Repair

In this video we track down a problem that’s causing a range of keys to be dead on this Oberheim OB-Xa. I explain what a switch matrix is and how it’s used by synthesizers to scan the keybed–this is still the way things are done today! And we use our new knowledge of switch matrixes […]

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Synthchaser #094 – Roland MC-8 MicroComposer Vintage Sequencer Repair

I couldn’t pass up the opportunity to repair this rare and interesting early sequencer made by Roland. Very few of them were made and even fewer still exist today. But there’s no service manual or schematics! So we have a look around inside and see what makes it tick, and I show you an approach […]

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Synthchaser #093 – Sequential Circuits Piano Forte – Prophet 5 of Electric Pianos?

We see what the Sequential Circuits Piano Forte / Siel PX electric piano has to offer and see if it’s worthy of the Sequential Circuits name. We also peek around inside and see how it works.  

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