Hack a Day » roland

Roland 808 synced to MIDI

Brian Benchoff — Tue, 20 Sep 2011 22:01:31 +0000

Reading this week’s ATtiny-themed builds, [Thomas] was reminded one of his coolest builds. His midi808 project used an ATtiny2313 to sync a vintage Roland 808 drum machine to his Logic workstation.

Even though MIDI had been around for a few years when 808s were being made, the CPU in the 808 isn’t exactly up to the task of handling MIDI. Instead, the 808 used an interface known as DIN Sync that was designed to keep 808s, 707s, and 303s in time with each other. MIDI to DIN Sync boxes do did exist, but even the auxiliary equipment to use an 808 is getting hard to find.

The build takes a MIDI signal and passes it through an opto-isolator per the MIDI spec. The microcontroller reads the MIDI signal and passes it out through the DIN Sync port. The DIN Sync protocol is only 24 pulses per quarter note output with TTL voltages, and the project code is easy enough to follow. It’s a nice build for one of the greatest drum machines ever made. Listen to a track [Thomas] made with his new setup after the break.

Filed under: musical hacks

Javascript drum machine

Eliot — Mon, 17 Nov 2008 22:44:58 +0000

[Cameron Adams] recently appeared on a panel about JavaScript libraries. He represented the hard working coder that still wrote everything from scratch. He wanted to make something mindblowing for the audience. He ended up creating the JS-909 drum machine entirely in javascript without relying on libraries or flash. While he makes no claims of compatibility, it certainly is a nice bit of kit.

[via Waxy]

Posted in digital audio hacks, downloads hacks

TB-303 teardown

Juan Aguilar — Tue, 01 Jul 2008 03:36:00 +0000

Flickr member and owner of awesome stuff [Firegroove] brought us a teardown of a Roland TR-909 drum machine before, and now he brings us a new photoset of a TB-303 synth teardown. The machines comprise two thirds of the holy trinity of 80′s electronic music machines, so look after the break for more photos.

Here we see the main board with several knobs and switches still attached.

This is the underside of the board. Enjoy this photoset, because getting your hands on a TR-303 is nearly impossible. Still, that doesn’t mean you have to live a 303-free existence. Check out [Ladyada]‘s TR-303 clone, the x0xb0x. You can purchase the DIY board from the site and get your synth-on now.

[via Matrixsynth ]

TR-909 Teardown

Juan Aguilar — Thu, 19 Jun 2008 01:30:00 +0000

Flickr user [firegroove] recently had to take apart his Roland TR-909 drum machine in order to fix it, and he photographed the entire teardown, offering detailed pictures of the TR-909′s internal parts. The TR-909 is legendary as one of the first fully programmable drum machines that could store entire songs, and its legend is only boosted by its scarcity: only 10,000 were ever made. If you can’t afford or simply refuse to tear yours apart, look after the break for a few more photos from inside.

This is a shot of the largest PCB in the TR-909, which contains all of the console knobs.

In this closeup of the board that hold the 16 step buttons, you can clearly see the TC5565P-15 chip in the center, which is a generic memory chip. It is probably one of the most replaceable parts in the whole machine. A few other chips specific to the TR-909 can also be seen.

We would have liked to see a little more description of what each part does. That said, it’s great to see the inside of this machine, which would have been a tall order given the rarity of it and the value a typical owner attaches to it. If you’re interested in getting a feel of how a TR-909 sounds, check out ReBirth RB-338: it’s a retired program that modeled the analog hardware to emulate the functions and sounds of a TR-909, as well its sister drum machine, the TR-808, and the eminent TB-303.

[via Matrixsynth]