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Showing posts sorted by date for query Unrelated Activities. Sort by relevance Show all posts

Saturday, March 11, 2023

Arduino Drum Sequencer and Arduino CV Quantizer controlling Analog Synth Drums and other Modules


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"The Arduino drum sequencer is sending MIDI to a MIDI to CV and Gate converter, the converter gates then control analog drums and send a clock to the Arduino CV Quantizer, the CV Quantizer is processing a sine wave LFO and sending gate and quantized CV to an ADSR and a VCO and VCF pair. A VCA completes the patch. Arduino Drum Sequencer and Arduino CV Quantizer controlling Analog Synth Drums and other Modules."

Friday, March 03, 2023

Testing Basic Preset Function Implementation Arduino 8x8 Drum Sequencer


video upload by Unrelated Activities

"Now using the Arduino Nano EEPROM (1024 bytes) to store some preset patterns. Each pattern size is 64 bytes, so there is room for 16 presets. The presets were written to eeprom before uploading this sketch, for now we just read and load them to the steps[][] array. 8x8 sequencer, very basic in its features. The interface is composed of two rotary encoders with switch, and a 128x64 I2C OLED display. The display presents an eight rows x eight columns grid, rows are steps, columns are tracks. Encoders are used to navigate through the grid coordinates, The X encoder switch selects Cursor or Write mode, in Cursor mode an'x' is shown on the grid and a 0 is written in the selected slot in a bi-dimensional array, in Write mode a filled square is drawn on the grid and a 1 is written in the selected slot in the array. The encoder Y switch has three modes: Edit, Tempo, and Play. In Edit mode the sequencer pattern can be created, in Tempo mode the Y encoder sets the sequencer BPM (Beats Per Minute), in Play it plays the pattern. The right side of the display shows the BPM and the current mode, the left side shows a rectangle indicating which step is being played. Each track fires a gate using eight Arduino pins (0 - 4.7V) and also sends MIDI notes through TX pin (channel 10, GM drum notes 35, 38, 42, 46, 45, 50, 64, 76). It works, but the display is too small for my eyes... Code is in a pinned comment."

Tuesday, February 28, 2023

Arduino 8x8 Gate Sequencer Rhythm Pattern Generator with Two Rotary Encoders and OLED Display


video upload by Unrelated Activities

"An 8x8 sequencer, very basic in its features. The interface is composed of two rotary encoders with switch, and a 128x64 I2C OLED display. The display presents an eight rows x eight columns grid, rows are steps, columns are tracks. Encoders are used to navigate through the grid coordinates.
The X encoder switch selects Cursor or Write mode, in Cursor mode an 'x' is shown on the grid and a 0 is written in the selected slot in a bi-dimensional array, in Write mode a filled square is drawn on the grid and a 1 is written in the selected slot in the array.
The encoder Y switch has three modes: Edit, Tempo, and Play. In Edit mode the sequencer pattern can be created, in Tempo mode the Y encoder sets the sequencer BPM (Beats Per Minute), in Play it plays the pattern.
The right side of the display shows the BPM and the current mode, the left side shows a rectangle indicating which step is being played.
Each track fires a gate using eight Arduino pins (0 - 4.7V) and also sends MIDI notes through TX pin (channel 10, GM drum notes 35, 38, 42, 46, 45, 50, 64, 76). It works, but the display is too small for my eyes...
Schematic in the video, Arduino code in a pinned comment."

Friday, January 20, 2023

Yamaha TX81Z panel switches board


video upload by Unrelated Activities

Friday, January 13, 2023

TX81Z Arduino MIDI Controller / Editor


video upload by Unrelated Activities

"This Arduino MIDI controller features six potentiometers, four rotary encoders with switch, five additional momentary normally open tactile switches, and one 128x64 pixels I2C OLED display. MIDI output is via traditional five pin DIN connector, there will be TSR jacks for expression pedals and foot switches (for on-off messages like hold and/or sostenuto).
Currently implemented code for sending control change using potentiometers and pedals, and system exclusive messages reproducing the panel switches of the TX81Z (using rotary encoders and switches)."

Tuesday, December 06, 2022

Starting a Sidecar MIDI Controller to expand the Ibanez IMG2010 MC1 Guitar to MIDI Converter system


video upload by Unrelated Activities

"The Ibanez IMG2010 electric guitar and MC1 MIDI Converter is an old (1986) but good MIDI guitar system. Apart from translating the audio signal frequency and amplitude from each guitar string to MIDI note number and velocity, it provides MIDI program change messages (via panel buttons and/or a IFC60 footcontroller), Hold pedal, a CTL rotary potentiometer and an Arm on the IMG2010 guitar with assignable MIDI control change messages (cc00 to cc32). When controlling modern MIDI rack synthesizer modules, these control change options are a bit limiting, so I decided to start designing an Arduino 'sidecar' expansion MIDI controller to be used in parallel to the IMG2010 & MC1. It can be fun."

Friday, December 02, 2022

Roland MIDI System Exclusive Messages Checksum


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Saturday, November 19, 2022

pedalboard


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Sbranvlztronics DIY pedal board synth.

Sunday, November 06, 2022

That Damn Gooey Rubber Strikes My Most Well Conserved Instrument!


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Manufacturers need to stop using this stuff.

Saturday, October 22, 2022

A Quadrature Triangle Wave LFO Simulation, just for fun


video upload by Unrelated Activities

"Creating a quadrature triangle wave output with a basic Schmitt trigger and integrator LFO can be done with some logic and waveshaping, but this always involve dealing with transition clicks attenuation. Another approach is to employ a second LFO circuit receiving a small impulse from a zero cross comparator connected to the integrator output of the first LFO integrator. There will be no waveshaping here, therefore no clicks, but the two integrators need to be identical."

Thursday, October 20, 2022

Sbranvlztronics Low Frequency Oscillator Sync Test - Analog LFO with Reset on Breadboard


video upload by Unrelated Activities

"Testing a LFO with a synchronization circuit. The idea is to force the LFO triangle wave output to immediately go to zero volt when receiving a positive gate or trigger at a Sync input. When the gate or trigger at the Sync input returns to zero, the triangle wave output must then always restart with an upward ramp. On this breadboard the reset circuit was implemented with a CMOS analog switch, and the sync control is just a wire to activate it."

Sunday, October 02, 2022

Moog ladder VCF with Voltage Controlled Emphasis, on Breadboard


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"Moog transistor ladder VCF (Voltage Controlled Filter) with voltage controlled emphasis, on breadboard."

Monday, September 26, 2022

Analog Modular Synthesizer 20220925 LIVE


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"Analog Modular Synthesizer 20220925 LIVE
Chaos Modulation"

Sunday, August 21, 2022

Analog Modular Guitar Synthesizer NINE Oscillators Patch


video upload by Unrelated Activities

"An Analog Modular Guitar Synthesizer patch using nine oscillators, integrating the electric guitar into the modular synth world. Four oscillators are in octaves, the five remaining VCO/PCO create a chord running in parallel. If my Arduino Clock Divider and Logic thing still has sufficient memory space available, I will try to implement a harmonizer algorithm to improvise some basic non parallel chord-melody progressions, would be nice... I forgot to hook up two more ADSR/VCA pairs, that's why some note releases are a bit weird."

Tuesday, August 09, 2022

Analog Modular Guitar Synthesizer Four Oscillators Patch


video upload by Unrelated Activities

"Analog Modular Guitar Synthesizer Four Oscillators Patch, integrating the electric guitar into the modular synth world."

Monday, March 23, 2020

GR-300 Based Homemade Guitar Analog Synthesizer - Part 01


Published on Mar 22, 2020 Unrelated Activities

"GR-300 Based Homemade Guitar Analog Synthesizer - Part 01

#Guitar Synthesizer
#Roland GR-300
Soundtrack: Springy, Spongy ma non troppo (Sbranvlztronics, Csound)"

Tuesday, October 01, 2019

Matrix II Analog Synthesizer: VCA (Voltage Controlled Amplifier)


Published on Oct 1, 2019 Unrelated Activities

"Matrix II Analog Synthesizer: VCA (Voltage Controlled Amplifier)"
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