Makusop

16 Step MIDI Filter Sequencer The designs for the Step Control Sequencer are at https://www.dropbox.com/s/2qrzs54olngtqqz/StepSequencer%20R1_0%2005-02-2014.zip Following two months developing code and playing with breadboards I present this quick demo of the recently completed DIY digital 16-step control sequencer. This sequencer was designed for controlling filter steps on an MS-20 mini. The sequencer puts out variable step control voltages up to +5 volts and synchronizes to midi start/stop/clock messages. To achieve control over 16-steps with only 8 pots, I employed a toggle switch that can program steps 1-8 or steps 9-16 without reading changes until the pot positions are changed. All the control processing happens on the Arduino Mega. I have prototyped two circuit boards for this project. The first is a midi shield. The midi shield features one minijack control voltage output, one midi input with an opto-isolator, and one midi thru port. The second board I made is a panel control u...

15 Filter Types of the Oberheim Matrix 12 Xpander In this demo I audition all 15 Matrix-12 filter modes, with various Resonance settings. At the end of the video I max out the resonance characteristics for each type. Which one is your favorite? Along the way youll see some interesting factoids. YOU HAVE BEEN WARNED - be careful with your audio level settings, the audio can go from very quiet to very loud resonant sound from out of nowhere. download file now