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Showing posts sorted by date for query ZElTGElST. Sort by relevance Show all posts

Tuesday, September 14, 2021

PolyRotas, Opera Rotas transforms into a polysynth (Megadrive/Genesis based)


video upload by ZElTGElST

"Opera Rotas has a new firmware that transforms the drum machine into a fully 9 voice polyphonic synth based on true, vintage Yamaha FM chips.

It´s a bit like transform a Sega Genesis/Megadrive into a playable synth with a midi keyboard.

If you have an Opera Rotas (revision 0.9 or higher) you just need the new firmware, available in my stores. So you can have both firmwares with one machine: the classical Drum Machine and this new PolyRotas."

Wednesday, January 20, 2021

Spherical Sound Society ARCANE: Generative Chiptune FM Drum Synth


video by ZElTGElST

Spherical Sound Society brought us the Opera Rotas Experimental FM Drum Machine posted here.

"ARCANE is a generative synth that lies somewhere between a synth, a sequencer and a drum machine, depending on how you interact with it.

It is based on an authentic Yamaha YM2413 FM chip; the one used in some arcade coin ops, MSX and in the japanese version of the Sega Master System.

To control it it has 6 potentiometers and 3 buttons. The pots are:

-Tempo. It controls the tempo/speed

-Base Register. It determines if the machine is more musical or glichy

-Intensity. The higher this pot, the more amount of notes and percusions sounding. This is a veru playable way of alter the generative composition by transitioning between the simple and complex sound explorations

-Sequence. It let you browse between sequences.

-Dispersion. the higher this pot, the most registers that we are writing on the chip, so the sequences get more complex and chaotic

-Combination. It multiplex, demultiplex and recombines sequences, keeping the output related but always fresh and different

It has 3 buttons, Left, Right and Reset. Reset is located in the arduino and is self explanatory. Left and Right buttons are to be determined as the firmware is still in development.

It has Clock In and Clock Out so you can synch it with external gear

It comes fully assembled and ready to play.

You can listen to some demos on soundcloud:



You can get assembled units, kits and PCBs at:
https://www.tindie.com/products/jc204..."

Wednesday, June 24, 2020

Spherical Sound Society - Opera Rotas Experimental FM Drum Machine


ZElTGElST

"First demo of the machine. Please excuse the poor direct audio. I will be uploading quality captures to soundcloud in the coming days.

Live it sounds crisp, crystal clear aun unique beyond words.

I have written an experiemtal synth/drummachine around the Megadrive FM audio chip. The firmware is in progress. The machine creates patters at the fly that you can mangle and tweak with mostly all the FM parameters in real time.

Its plenty of beautiful electronic landscapes, rythms and techno mayhem.

The unit has a midi in port, so you can play it with a keyboard too (this firmware is to be implemented, if any)

Some units and PCBs will be available to sell in the coming weeks at my tindie store:

https://www.tindie.com/stores/jc2046/"


"OPERA ROTAS is a mutant, generative drum machine. It's built around a Yamaha OPL2 FM audio chip, a close cousin of the Sega Genesis / Megadrive consoles.

At the core, it has a real Yamaha OPL2 audio chip and live sounds bonkers. Brutal, it's all body weight while being crystal clear and punchy. Really the videos don't do aural justice but it serves to get an idea. There will be decent audio demos coming to my Soundcloud soon.

The firmware is a work in progress. One branch of the firmware consists of attaching a midi keyboard to it and converting it into a fully fledged polyphonic synth.

The project will go open source at some point. I just ask for people to not do commercial PCBs of it, as I sell it here. If you get one PCB or kit you can ask for the source code to tweak it if you will.

It comes in 4 flavours:

Built unit. Ready to plug and play.
Full kit. Everything you need to build one. You need to solder it. Beginners level.
Basic kit. The PCB plus a programmed SMT32 microcontroller. You source the rest of the components.
PCB alone. You source all the components, program the chip, and run it."

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