Getting up to speed on step sequencers

September 22, 2010 · Posted in Uncategorized 

A basic description of what the seq does.

I have been getting questions about what my pseudo random or fuzzy microcontroller sequencer does, and how it does it. You may remember about 6 months I talked about several kinds of sequencers including the microcontroller sequencer. The concept behind this sequencer is to let it do the work of composing and triggering whatever toys are connected to it. This allows focusing on tweaking the modifications on the toys, and to use a mixer to layer or enhance sounds. The toys have to be prepped with rca jacks to be connected to the sequencer. After this is done the sequencer acts as remote buttons for the toys. The microcontroller is programmed to trigger the buttons in randomly generated patterns. When powered on or reset the code randomly, as random as small digital can be hence pseudo and fuzzy, creates an array of numbers that correspond to the four channels of the sequencer. Then an increment or step size is randomly selected as well as a number of times to repeat moving through the array using that increment size. For example an array of 32 elements might looked like this:
1, 1, 4, 3, 1, 3, 2, 4, 2, 4, 1, 4, 4, 4, 3, 1, 1, 2, 3, 1, 2, 3, 1, 4, 4, 4, 2, 3, 2, 3, 1, 1

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