vidiotsquad » midi http://www.vidiotsquad.com stuff about stuff Thu, 18 Nov 2010 19:57:10 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Msa midi kit http://www.vidiotsquad.com/msa-midi-kit/ http://www.vidiotsquad.com/msa-midi-kit/#comments Mon, 28 Dec 2009 19:03:09 +0000 bod http://www.vidiotsquad.com/?p=228 Now that Christmas is over, I’ve had chance to build the kit I bought from highly liquid. I’ve had a few of these in the past, and they are really good quality and easy to build and use, highly recommend!

Took about an hour to build and about 15 minutes to install into my dr-110 to replace the arduino-midi converter I whipped up on strip board that was in there.

]]> http://www.vidiotsquad.com/msa-midi-kit/feed/ 4 arduino and midi input http://www.vidiotsquad.com/arduino-and-midi-input/ http://www.vidiotsquad.com/arduino-and-midi-input/#comments Sun, 22 Feb 2009 12:21:51 +0000 bod http://vidiotsquad.com/?p=103 i’ve been using the arduino for midi input and output for a while now, mainly using kuk’s input method, output is easy enough though. midi input had me stumped for a while, but he found adding 100k resistor to the base of the phototransistor of the optoisolator created a stable response which sorted it out.

theres alot you can do with variations of his code, and many people have used the circuit to build midi>cv convertors for analogue synths, but at the moment i’m mostly interested in building a clock source for analouge/digital sequencers so i can run them straight from the output of my HR-16 or tr-505 without the need for a computer based midi sequencer. the basic idea is to receive a midi clock byte and advance the count of a 4 bit binary output from the arduino to advance the steps of a multiplexer ic based sequencer.

midi clocks output 24 pulses per quarter note, so this needs dividing down to get the step response you need. the ever useful and highly inspiring code from littlescale comes in handy here!

more soon.

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