Matrix Analog Synth by Sbranvlztronics

Published on Dec 29, 2017 Sbranvlztronics

"Sample & Hold sampling a triangle wave and feeding some modules."

See the Sbranvlztronics label below for more.

Sbranvlztronics - What is the CV Quantizer?

Published on Jun 1, 2018 Sbranvlztronics

"Here we show some of the features of the homemade CV quantizer based on Arduino (ATmega328).
Enjoy."

Sbranvlztronics CV Quantizer

Sbranvlztronics VCOs PART 2 - Matrix II Homemade Analog Synthesizer

Published on Nov 21, 2017 Sbranvlztronics

"Something about the VCO, Voltage Controlled Oscillator, in the "Matrix" II Homemade Analog Synthesizer. This synth has 3 identical VCOs, based on the Electronotes / ASM VCO, with minor modifications to allow for some electronic components substitutions. In this video the available front panel connections are shown, also a patch using the sync feature.

Other modules will be shown in next videos (3 VCOs, 4 dual VCAs, 2 moog ladder VCFs, 2 LFOs, 3 ADSRs, VC Phaser, VC Delay, Divider, Sample & Hold, CV Lag, 2 Inverters, 4 channel mixer, Ring Modulator, Noise generator)."

See the Sbranvlztronics label below for more.

CV QUANTIZER with Arduino - 02 - output on oscilloscope, and more features included

Streamed live 1 hour ago Sbranvlztronics

"Testing new features: - 11 scales selected by a potentiometer or CV;
- 3 sources for tempo control: pot, CV or external clock;
- the 2 quantizer channels' tessitura can be independently controlled (low and high range) by pots or CV;
- transposition
- clock output (not tested in this video)

Thanks,

Sbranvlztronics"

Part 1 here. See the Sbranvlztronics label below for more.

Sbranvlztronics - Testing the almost finished CV Quantizer . 3rdWorldRack 'Jazz'

Published on May 27, 2018 Sbranvlztronics

"Testing the almost finished CV Quantizer . 3rdWorldRack 'Jazz'"

First video in eurorack format. You can find breadboard build videos for the Sbranvlztronics CV Quantizer in the archives here.

VCA - Matrix II Homemade Analog Synthesizer

Published on Nov 27, 2017 Sbranvlztronics

"VCA - Matrix II Homemade Analog Synthesizer
Voltage Controlled Amplifiers"

See the Sbranvlztronics label below for more.

5 Way 24dB Linkwitz Riley Crossover as Synth Module

Published on Aug 9, 2019 Sbranvlztronics

"Here is a five band fourth order Linkwitz-Riley active crossover used as synthesizer module for multiband audio processing.
This module is based on a circuit from Eliot Sound Production (link bellow).
E.S.P. project 09 Linkwitz-Riley Electronic Crossover: https://sound-au.com/project09.htm

Thanks for watching

#Sbranvlztronics"

Sbranvlztronics Arduino Clock Divider Logic Thing: Circuitry and Build

Published on Aug 27, 2018 Sbranvlztronics

"Arduino Clock Divider Logic Thing: Circuitry and Build

This is how I made it, old style DIY hand drawn printed circuit boards... The soundtrack is the Arduino Clock Divider Logic thing, Arduino CV Quantizer, 3 VCOs, 3 VCFs, 3 VCAs, 3 ADSRs and 2 LFOs (analog modules from Matrix II analog synth and MSB Modular Synth B), everything built the same manner.
Thanks for watching."

Sbranvlztronics Arduino Clock Divider Logic Thing preview

Published on Aug 13, 2018 Sbranvlztronics

"First test of the Arduino Clock Divider Logic Thing module. The thing is driving a Roland SC55 via MIDI (drums and slap bass), and the ADSRs of two analog synth voices (VCO VCF VCA ADSR) on the Matrix II Analog Synth. Pitches for the analog synth are derived from the CV Quantizer (to the right in the video). The drum kit pieces are controlled by the 8 logic outputs from the Arduino Clock Divider Logic Thing."

Building a CV QUANTIZER with Arduino - 01

Published on May 2, 2018 Sbranvlztronics

"A CV quantizer with Arduino UNO (ATmega328) in its earlier stage of development. In this video the quantizer is doing its thing on two LFO waveforms. There is two independent CV inputs to be quantized, other parameters are voltage controlled also: scale choice, clock, tessitura (low and high note range for each CV input channel). Yet to be implemented are: synchronization with external clocks, MIDI output, if memory won't run out...

Enjoy

Sbranvlztronics"

Matrix II Homemade Analog Synthesizer - VCOs

Published on Nov 19, 2017 Sbranvlztronics

"Something about the VCO in the 'Matrix' II Homemade Analog Synthesizer. This synth has 3 identical VCOs, based on the Electronotes / ASM VCO, with minor modifications to allow for some electronic components substitutions.

Other modules will be shown in next videos (3 VCOs, 4 dual VCAs, 2 moog ladder VCFs, 2 LFOs, 3 ADSRs, VC Phaser, VC Delay, Divider, Sample & Hold, CV Lag, 2 Inverters, 4 channel mixer, Ring Modulator, Noise generator).

Welcome to Sbranvlztronics

*Links and articles pertinent to the VCO:
Terry Mikulic
"New Design Ideas for Voltage-Controlled Oscillators"
Electronotes, Vol. 8, No. 62, Feb. 1976, pp 13-15

CLICK FOR MORE »

Spectral Arpeggiator: PC - MidiBox CV - Matrix Analog Synth

Published on Nov 22, 2017 Sbranvlztronics

"Simple patch presenting a 'Spectral Arpeggiator'.

In this video a PC running a MIDI sequencer sends data to a MidiBox CV converter, which then controls the Matrix synthesizer patch.

The master Voltage Controlled Oscillator (VCO) determines the fundamental frequency, and the synced slave VCO is sweept for harmonics using very short notes. The slave VCO triangle output is sent to the Voltage Controlled Phaser, VCA and finnaly to the Voltage Controlled Delay. The wet/dry mix of the CV Delay is controled by midi velocity, CV Phaser cutoff freq. by a local LFO. Tweaking the ADSR potentiometers create some nice variation in the textures.

Hope you enjoy, thanks for watching.
Sbranvlztronics."

CV QUANTIZER with Arduino 03 - breadboard playing

Published on May 24, 2018 Sbranvlztronics

"Testing the CV Quantizer: ATmega328 microprocessor (arduino) and the DAC0800 digital to analog converters are already on their respective printed circuit boards. The breadboard parts are related to CV input and output level shifting, 7 segment display, indicator LEDs and some signal routing / (de)multiplexing.
The Quantizer is receiving and sending control voltages from / to 2 of my homemade analog modular synthesizers (MSB and Matrix).
Enjoy.
Sbranvlztronics"

IQ Ring Modulation : analog Frequency Shifter patch

Published on May 15, 2019 Sbranvlztronics

"An Allpass filter network and a Quadrature VCO on protoboard, plus LFO and two Ring Modulators 3rdWorldRack modules."

I'd love to see the audio output on the oscilloscope.

Update:

Frequency Shifter Patch: Oscilloscope and Spectrogram

Published on May 19, 2019 Sbranvlztronics

Serge Triple Waveshaper on breadboard

Published on Jan 11, 2019 Sbranvlztronics

"Serge Triple Waveshaper on breadboard

Thanks for watching

If you want to send me something (for tests, review, teardown, a gift, or a postcard):
Sbranvlztronics
Caixa Postal 19
Londrina - PR, Brazil
CEP 86001-970"

Matrix II Homemade Analog Synthesizer

Published on Nov 17, 2017 Sbranvlztronics

"Matrix II Homemade Analog Synthesizer brief description, showing the front panel with its 64 potentiometers, 100 jacks patch matrix, and listing the 24 modules.

3 VCOs, 4 dual VCAs, 2 moog ladder VCFs, 2 LFOs, 3 ADSRs, VC Phaser, VC Delay, Divider, Sample & Hold, CV Lag, 2 Inverters, 4 channel mixer, Ring Modulator, Noise generator,

Welcome to Sbranvlztronics"

Arduino Clock Divider Logic Thing Review (for modular synthesizers)

Published on Aug 19, 2018 Sbranvlztronics

"A description of the Arduino Clock Divider Logic Thing module functionality. This module is a clock divider using an ATmega328 microcontroller, a bunch of shift registers, transistors and opamps. The 20 HP panel is made of plastic, behind it there are be four pcbs to accommodate the circuits (all hand drawn and using only thru-hole components...). The divider section has 8 outputs, with division ratios defined in software (1, 2, 3, 4, 5, 6, 7, 8 or whatever wanted). There is a logic section with another 8 outputs, the logic gates and divisions configuration being selected by a potentiometer and a switch (64 configurations, or algorithms). Also one AND and one XOR patcheable gates sharing two inputs, a random trigger output, and a MIDI output. The software can be modified using a FTDI connection on the front panel. The clock can be internal (controlled by a pot) or external, or can be controlled by any external continuous CV (there is an attenuation/inverter pot and an offset pot for this CV), the conditioned CV has its output on panel. And of course a lot of LEDs...
The circuits involved will be shown in another video.

Thanks for watching.

Sbranvlztronics"

Yamaha QX5 Digital Sequence Recorder (MIDI Sequencer) LCD repair

Published on Aug 30, 2018 Sbranvlztronics

"An old Yamaha QX5 sequencer that was collecting dust for decades, and needed some repair (the LCD was fading). It was cleaned, fixed, and is working. I had only a blue LCD, so now it has a new look.
The soundtrack is the Arduino Clock Divider Logic thing, Arduino CV Quantizer, 3 VCOs, 3 VCFs, 3 VCAs, 3 ADSRs and 2 LFOs (analog modules from Matrix II analog synth and MSB Modular Synth B), everything built here at the 'Sbranvlztronics Labs' :) (watch the other videos in this channel in case you have interest in analog synthesizer modules).
Thanks for watching."

Kind of a Wavefolder

Published on Dec 29, 2018 Sbranvlztronics

"Thanks for watching"

3rdWorldRack synth jam

Published on Apr 14, 2019 Sbranvlztronics

"3rdworldrack modules built so far: 2 VCOs, VCF, ARP VCF, dual VCA, dual ARP AR (ADR), VCDelay, Mixer/LFO/Digisound Ring Modulator, Power Supply, Arduino CV Quantizer and CV Quantizer Extender, Arduino Clock Divider Logic Thing and Octal DAC."