SYNTECNO T303 TeeBee (much more than a Roland TB 303 clone!)

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"SYNTECNO Teebee T303 , analog monosynth, filter IN, CV gate, MIDI TO CV GATE CONVERTER, great sound, very rare! Cusomized wih Moog style knobs!"

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Crumar GDS MIDI interface

Published on Jul 24, 2015 Michael Kukat

"The Crumar General Development System is a very rare late 1970s digital synthesizer based on the Bell Labs Digital Synthesizer, also known as the Alles Machine.

It might better be known by it's little brother, the Digital Keyboards Synergy. I'm fascinated by this machine since 7 or 8 years meanwhile, since i read about it in Mark Vail's Vintage Synthesizers book. One day, i want to have it replicated on a firmware basis running on a suitable micro.

A bit more than a year ago, i sort of accidentally bought this keyboard from eBay, missing the point that it might be hard to impossible to get the main unit for it. As the offer appeared several times from the seller before, i might not have been the only one.

But if i botch it, i'll fix the situation and not cowardly step back from the purchase. I mean. How hard can it be to make this a MIDI controller?

Really - not that hard. The "communications protocol" consists of several signals controlling some counters that control some multiplexers and a ramp ADC, not so difficult. It's a bit like a serial datastream for the keyboard and PWM for the potentiometers. But why not do it completely right and also support the other direction, adding MIDI to a Crumar GDS? So i took some more care analyzing the host-side interface circuitry to understand it and implement exactly the same signal behavior here.

So technically, this interface intercepts the keyboard and potentiometer lines using SPI DMA for the keyboard bits and timer PWM/capture for the potentiometer data. If the interface runs in master mode, there is another timer-controlled DMA generating the control signal stream, otherwise, this comes from the GDS and is just passed through.

The front panel LEDs, based on a ICM7218, are also intercepted, so i use externally-triggered timer controlling GPIO DMA to read the host writes into a MCU buffer, extract the LED data and forward this to the output code, which writes them to the keyboard. I can switch to internal LED control easily this way without losing host LED changes.

All this is based on a STM32F103RCT6 running at 72MHz. There is not even interface circuitry as the signal drivers in the STM32 are strong enough for the TTL receivers, the inputs already have schmitt-triggers, it just fits between the cable.

So far, everything basically works, basic MIDI support is there, now it's time to complete the configuration by SysEx and by the keyboard controller itself, implement firmware update via SysEx, add the USB MIDI support, make the 4 LEDs show some useful status information, but all this is just software.

The hardware is now completed and tested - which was the main purpose of this video, while showing you another not so common DIY hack."

Crumar GDS MIDI interface testing

Published on Jul 30, 2015 Michael Kukat

"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."

Arturia Beatstep Pro Demo + Jam

Published on Jul 24, 2015 Jackie Ananian

"A live jam using the new Arturia Beatstep Pro

Download this track from Soundcloud:
https://soundcloud.com/mybeautifullea...

Instruments used:
Moog Minitaur
Vermona Drm1
DSI Prophet 08

mybeautifulleahmusic.com"

Beatstep Pros on eBay

LoopTree ideas: Audiobus remote

Published on Jul 24, 2015 Coding Cod

"I've been exploring how Audiobus remote might be integrated with LoopTree. Let me know what you think of what I've done so far.

This video features a development build of LoopTree and the Audiobus remote triggers are not yet available in the app store version."

iTunes:
LoopTree - Coding Cod Ltd
Audiobus - Audiobus Pty Ltd
Audiobus Remote - Audiobus Pty Ltd

Roland JX-3P Analog Synthesizer SN 368919

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Yamaha CS15D in time warp condition

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Roland Germany AIRA Modular Synthesizer Effekte Promo Pic Ad

flickr by ROLAND Germany

"GELANDET :-) Die Roland AIRA Modular Synthesizer Effekte DEMORA, BITRAZER, SCOOPER und TORCIDO sind ab sofort erhältlich. Beim AIRA Dealer deines Vertrauens!

DEMORA: rolandmusik.de/products/demora/
BITRAZER: rolandmusik.de/products/bitrazer/
SCOOPER: rolandmusik.de/products/scooper/
TORCIDO: rolandmusik.de/products/torcido/
SYSTEM-1M Modular Synthesizer:
rolandmusik.de/products/system-1m/
Gratis AIRA Modular Customizer App für iOS, Android, OSX und Windows:
rolandmusik.de/products/aira_modular_customizer/"

KORG iM1 App Review - Sweetwater's iOS Update, Vol. 105

Published on Jul 20, 2015 SweetwaterSound

iTunes: KORG iM1 - KORG INC.

"Korg's M1 digital synthesizer is back in the iM1 synth app. You get all of the original preset sounds from the original M1, plus sounds from Korg's T1 as well. Additional sound libraries are available via in-app purchases."

Live Set.21_ReTrOeSpAm_ - Ant GM - Elektron Octatrack + Machinedrum

Published on Jul 24, 2015 Ant GM

"New LiveSet.

follow me on Twitter:
https://twitter.com/AntM_GM
@AntM_GM"

Error Instruments new small FERTAS NANO & ERROR PARROT !! 4.0

Published on Jul 24, 2015 paul tas

"only 5 made

Made in Amsterdam

only at www.errorinstruments.com"

ERROR PARROT !! 4.0 + triger out 1 for Samuel Cameron

Published on Jul 24, 2015 paul tas