MATRIXSYNTH: 11/10/23 (demo) External audio through the modulation circuit of Maestro Rhythm King MK4 (for sale)


Saturday, November 11, 2023

11/10/23 (demo) External audio through the modulation circuit of Maestro Rhythm King MK4 (for sale)

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video upload by Cfpp0

"A beat gets added at 3:35 to demo the full sound of the machine, but otherwise this is just the sound of the Hewlett-Packard 241A oscillator (into the Heathkit ID-4101, padded down by a Rucci passive mixer) sent into the modulation circuit on the Maestro Rhythm King MK4. Each available preset is selected so that you can hear how the circuit chops up the external audio in relation. You can also combine two or three presets for more complex rhythms."



via this auction

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"New video DEMO added to the photos section of this listing [posted here], and a few others at the Cfpp0 YouTube account.

This is a rare Maestro Rhythm King Mark 4. It is VERY different from the more common and more colorful Maestro Rhythm King (we have it too if you want to buy it). The biggest difference is that the MKIV has an external audio input, which gets fed into a gate circuit that follows the rhythmic patterns of the preset pattern you choose on the drum machine. Check the video in our photos and cut to 2:45 to see and hear how it works.

You can blend the drum sound using a fader to go fully hats, to be mostly kick and toms, or anywhere in between. The volume for the external audio has its own volume fader, as does the drum volume, so you can also use it just to modulate audio and not use the drums. There is also a blend fader for the gate on the external audio, so you can dial in how much of an abrupt cut you want.

We got it on EBay and it STUNK! I mean it reeked of cigarettes, like nothing we’ve ever received. So I did the fabric softener trick, where you put sheets of fabric softener in a garbage bag with the unit inside, seal it, wait two weeks, and it worked! This was years ago and the stench never came back.

It is not light. This thing was made to last. Enjoy!"

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