Youtor
Teensy midi euclidean sequencer arduino IDE
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=aqOsPZUo860
this is a four channel usb MIDI euclidean sequencer. the sequencer is running on a Teensy 3.5. The setup consist of four rgb rotary encoders from Sparkfun, a Teensy, an ssd1306 lcd, four momentary buttons, and four 16led neopixel rings. The housing is an old case from a bottle of port, for now, and a piece of spare translucent perspex. • Euclidean rhythms are explained by White Noises at the link below. there are three parts, • 1. the total number of steps in the sequence • 2. the number of hits within those steps • 3. how far the sequence is offset by • The euclidean algorithm is used to divide up the number of hits across the number of steps as evenly as possible. So, for example, if we had four hits happening over 16 steps, there would be one hit every four steps. Interesting things happen when the number of beats can not be divided evenly over the number of steps, and also when the number of total steps varies between different channels. • discussion on euclidean sequences by White Noises • • Euclidean Rhythms EXPLAINED • Inspiration for this comes from: • Euclidean Circles modular sequencer - https://vpme.de/euclidean-circles/ • • Euclidean Circles v2 by vpme.de - Int... • Current Features: • 4 tracks, 16 steps • 4 channel Midi over USB • midi clock divider per channel • 1/1 , 1/2 , 1/4 , 1/8 , 1/16 , 1/32 note • internal or external clock • automatic switch to external clock if present at startup • start / stop sync with external DAW midi byte • memory saved to SD card • 32 memory slot save and recall • USB powered • adjust step number per channel • adjust hit/beat number per channel • adjust offset value per channel • on/off per channel • step location indicator per channel • setting display on oled • absolutely no deep dive menu • The sequencer automatically uses external midi clock if present when switched on, otherwise uses internal clock that can be controlled by one of the rotary encoders. • all active steps per channel are shown as light blue, with the evenly spaced beats / hits shown as red. the rotary controlled selection options match blue for step number selection and red for beat number selection. • each channel can be switched off or on, change the clock divider, change the step number and beat number, as well as have an offset start point. this is all done by using the push button of the rotary encoder to select the option and then turn the encoder to select the value for that option. Al the settings are show on the LCD screen. • Connections for the Teensy 3.5 euclidean sequencer usbMIDI • connected to - pin ---- pin - connected to • ------------------------------------------ • all enc /etc - Gnd -----VIN - all enc /etc • Save fr MIDI - 0 -----A-GND - • Save fr MIDI - 1 ------3.3v - • rot1 left ---- 2 --------23 - button4 • rot1 switch -- 3 --------22 - button3 • rot1 right --- 4 --------21 - button2 • 5 --------20 - button1 • rot1 blue ---- 6 --------19 - Screen SCL i2c • rot1 green --- 7 --------18 - Screen SDA i2c • rot1 red ----- 8 --------17 - rot2 switch • 9 --------16 - rot2 blue • neopix rings - 10 -------15 - rot2 green • rot2 left ---- 11 -------14 - rot2 red • rot2 right --- 12 -------13 - • 3.3v ----GND - • rot3 right --- 24 -----DAC1 - (analogue only) save for CV out • rot3 left ---- 25 -----DAC0 - (analogue only) save for CV out • rot3 red------ 26 -------39 - rot4 switch • rot3 green --- 27 -------38 - rot4 blue • rot3 blue ---- 28 -------37 - rot4 green • save(timer3)-- 29 -------36 - rot4 red • save(timer3)-- 30 -------35 - rot4 right • rot3 switch -- 31 -------34 - rot4 left • 32 -------33 - • • BOM • 4 x 16led neopixel rings • 4 x momentary push button • 1 x Teensy 3.5 • 1 x SD card • 4 x Sparkfun RGB rotary Encoders • 1 x SSD1306 bi colour LCD 128x64 • 12 x 330 Ohm resistors (1 per rotary led colour) • connectors, solder, header pins, socket, etc. • References: • GitHub Code for this project is found at: • https://github.com/mortonkopf • display.cpp - Display class with printf() and human-readable units from Tiny Scope for Arduino project - Copyright (C)2015 Laurentiu Badea • Euclid calculation functions are taken directly from http://clsound.com/euclideansequenc.html - acknowledgment to Craig Lee • https://github.com/TomWhitwell/Euclid... • http://electro-music.com/forum/topic-... - Tombola and further expanded by sneak-thief and Syinsi. • Godfried T. Toussaint 2005 work on Euclidean algorithm. work on computing the greatest common divisor of two integers being linked to world music rhythms - paper “The Euclidean Algorithm Generates Traditional Musical Rhythms”. • http://cgm.cs.mcgill.ca/~godfried/pub...
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