Here is a look inside the Roland TR-909 Rhythm Composer where I do a quick service and repair and look around the circuitry.
Background info: Borrowing a TR 909 for a bit. A few test patterns on the Elektron Monomachine and Roland TR 909. Here the Monomachine is synced to the TR 909. This TR 909 has an earlier version of the MIDI specification and does not always follow MIDI perfectly. Vice versa works fine. Switching patterns manually on both the 909 and the Mono.
Here’s another addition to iPhone / iPod touch, the author of the beautiful, minimal iPhoneSynth has created a drum machine inspired by Roland’s classic TR-909. Basic features, but it could be fun to hash out a drum pattern for your next tune on the subway: IR-909 is a drum machine for the iPhone inspired by the Roland TR-909. IR-909 features a 16-step sequencer, 4 patterns, 8 different drum sounds and the ability to adjust tempo(BPM) and shuffle amount.
iPhone Applications at roventskij.net