Arcano MIDI NES Chiptune Synth on Kickstarter

Published on Jul 27, 2015 Arcano Systems

https://www.kickstarter.com/projects/...

"This is demo music created with the Arcano MIDI NES Chiptune Synthesizer. The device is an ATmega328-microcontroller-based MIDI synth designed to emulate the classic chiptune sound of the Nintendo Entertainment System's APU (audio processing unit.) If you are interested in the synth, please refer to the Kickstarter campaign page. The Kickstarter campaign rewards include both a fully assembled and tested version and a kit version for those who prefer to build it themselves. I created the music track myself, and I am not very musically talented. I'm interested to hear the music that more talented musicians will create with this synth, which is why I'm sharing the device through Kickstarter."

via the Kickstarter campaign:

"The Arcano MIDI NES Chiptune Synthesizer is a minimalistic, microcontroller-based synth designed to emulate the classic chiptune sound of the Nintendo Entertainment System's APU (audio processing unit.) The synthesizer's MIDI input allows musicains create NES-video-game-style chiptune music by simply connecting a MIDI keyboard or other MIDI device.

No programming is required. Each Arcano MIDI NES Chiptune Synthesizer includes a preprogrammed microcontroller; however, each synth also features a 6-pin AVR programming header, allowing programmers to flash the embedded ATmega328 microcontroller with their own custom software. The programming header enables hackers to create their own custom waveforms, envelopes, software low-frequency oscillators, and PCM samples.

Unlike many other microcontroller-based synthesizers which use internal PWM peripherals to generate weak, scratchy, low-quality audio signals, the Arcano MIDI NES Chiptune Synthesizer uses an auxiliary digital-to-analog converter chip to create a clear, high-quality audio signal.

Specifications:

3-note polyphony
1/8'' (3.5mm) jack mono audio output
MIDI input through standard MIDI DIN connector
7-segment LED waveform mode indicator
simple two-button interface
embedded ATmega328 microcontroller
Preset Modes:

Mode 0 - 12.5% duty cycle pulse waveform
Mode 1 - 25% duty cycle pulse waveform
Mode 2 - 50% duty cycle pulse waveform
Mode 3 - 75% duty cycle pulse waveform
Mode 4 - sawtooth waveform
Mode 5 - triangle waveform
Mode 6 - triangle-wave-based drums
Mode 7 - noise-based percussion
Mode 8 - arpeggio, 12.5% duty cycle pulse waveform
Mode 9 - arpeggio, 25% duty cycle pulse waveform
Mode A - arpeggio, 50% duty cycle pulse waveform
Mode b - arpeggio, sawtooth waveform
Mode C - arpeggio, triangle waveform
Mode d - vibrato, 12.5% duty cycle pulse waveform
mode E - vibrato, 50% duty cycle pulse waveform
mode F - vibrato, 75% duty cycle pulse waveform
mode G - vibrato, sawtooth waveform
mode H - vibrato, modulated duty cycle pulse waveform"

Kilpatrick modular meets Phenol!

Published on Jul 30, 2015 opsysbug

"Jamming Kilpatrick"

Note the Kilpatrick modular above the Phenol is it's own format and not eurorack although they are all inter-patchable of course.

Jupiter Clone Demo - PWM Modulation circuit

Published on Jul 30, 2015 tiergrinder

"Small update.

PWM section is now fully working. LFO / MANUAL / ENV control for each voices. I haven't tuned the PWM mod card yet so its not super refined.

All 8 VCO cards went through recalibration with proper oscilloscope and that made a huge difference on tracking at upper scales. Now each VCO follows over 6 octaves without detuning between voices."

Crumar GDS MIDI interface testing

Published on Jul 30, 2015 Michael Kukat

First part here.

"Another video about the Crumar GDS MIDI interface.

This time, both interfaces are in use. One is running in master mode, sort of emulating a real GDS (just the scan processor, not the synth), the other one in slave mode, working as a GDS MIDI interface.

The purpose was to test if everything works as intended, as it already did on the breadboad.

Controlling the Korg Gadget on the iPad with a Crumar GDS keyboard - fun :)

In the second part, i try to describe a bit how the interface between the GDS main unit and the keyboard works and how i hook into this communication to implement the interface. The DK Synergy works exactly the same way, it even has nearly the same pinout, just number of keys and pots differ. My interface board could also be used in a DK Synergy."

TTSH Semi Modular Synthesizer with Multi-Colored Lit Sliders

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via this auction

Note the second pic has different colored LEDs. You might want to clarify which one the listing is for if you plan to bid.

Roland SH-5 SN 480752

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via this auction

"This SH-5 is in perfect working condition and in very good condition!! This unit was overhauled by professional technician by Roland."

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DOEPFER MS-404 analog monophonic synth TB-303 emulator SN 961295

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via this auction

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VINTAGE UNIVOX MINI KORG K-2 700s ANALOG SYNTH SN 00155

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via this auction

"From the mid 1970s comes the fantastic K-2 / 700S monophonic synth….dual oscillator with Triangle, Sawtooth, and Square waveforms. used by bands like The Cars, Human League, and Stevie Wonder. Because you’re here, you know what this thing does.

Everything works on this one …all keys sound, all sliders and switches work, no scratchy pots or sliders. No modifications have been made to circuits.

LOW SERIAL NUMBER ! Storage compartment for power cord. Cosmetically about what you would expect for a 41 year old keyboard . Chips on the wood end blocks, and scratches and worn paint on the control panel.

The white plastic Effect Switch has been replaced with a chrome toggle switch..works as it should. The Pitch slider is missing the slider cap (they show up on eBay from time to time)."

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YAMAHA CS-15 Vintage Analog Monophonic Synth w/ Hard Case SN 1148

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via this auction

"The unit appears to be fully functional, all the knobs and sliders and keys worked fine as I tested. There may be a slight scratch noise on some of the knobs, which could do with some adjustment/servicing if required. Cosmetically the unit is in very nice condition as you can see. There are some minor wear and marks here and there, but nothing major."

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Moog Minimoog Model D SN 6712

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via this auction

"Overall, the synth is in excellent working condition. Cosmetic condition is really nice - the wooden cabinet has been given a clean & polish and has a great patina and grain to it. The front panel is clean with only a couple of marks. The metal case is in excellent condition with only small marks to the rear.

The synth was recently serviced, which included refurbishing the keyboard (bushings, bussbars, key contacts, keys) and calibrating the synth to specs. The synth retains its original oscillator boards.

All knobs, buttons and switches are present, original and function correctly.

All keys are clean and aligned and contact correctly.

The unit was tested today and the synth is working as it should be: 100% functional and the tuning is rock solid.

The synth can be switched between 230v and 115v.

Includes as part of the sale is the Armor flight case for the synth."

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