VOCODER, seven bands on breadboard #analogsynthesizer #modularsynth #synthesizer #vocoder

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"VOCODER, seven bands on breadboard.

Thanks for watching."

Unrelated Activities is Sbranvlztronics.

pedalboard

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Sbranvlztronics DIY pedal board synth.

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."

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)"

Arduino Dual Channel and XY Waveform Display

Published on Sep 7, 2019 Sbranvlztronics

"Thanks for watching"

No audio. Thought this was interesting. When you see your typical oscilloscope video, you get the impression you are looking at a representation of sound. This video, however, gave me the impression of actually looking at sound itself for the first time through a primitive telescope. Kind of like the first time discovering something you've never seen before.

Quadruple Serge Waveshaper LM3900 wavefolder analog synth module

Published on Aug 14, 2019 Sbranvlztronics

"Quadruple Serge Waveshaper LM3900 wavefolder analog synth module.

Thanks for watching"

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"

Quadrature Modulator DESTROYS JS Bach

Published on Jul 9, 2019 Sbranvlztronics

"The Quadrature Modulator comprises a Quadrature VCO (Yusynth VCLFO) and a "Dome Filter" (from J. Haible's Frequency Shifter)- see links bellow.
The VCO portion has 3 potentiometers (coarse and fine frequency tuning and modulation CV attenuation), one CV input, 4 outputs and 4 LED indicators.
The dome filter section has one input and two outputs. The outputs are 90º phase shifted from each other. The video shows the waveforms from the VCO and Dome Filter on oscilloscope.
Differences from Yusynth Quadrature VCLFO are the capacitor value (1nF instead of 10nF), and changes in the freq control (fine tuning pot, reduction of the CV input resistor value).
It can operate at audio and sub audio ranges (0.2 to 4000 Hz approximately), but 1V/8ª tracking is only marginal (~2 octaves).
There is no significant differences in the dome filter circuit.
Some examples shown in the video:
Quadrature VCO controlling 4 VCOs, 1V/8ª CV for the Quadrature VCO input coming from the CV Quantizer.*
Frequency Shifter patch using the Quadrature Modulator and two Ring Modulators.*
Adding FM CV to Quatradure VCO (from the Arduino Clock Divider Logic Thing Octal DAC).*"

Quadrature Modulator, analog synthesizer module 3rdWorldRack

Published on Jul 7, 2019 Sbranvlztronics

"The Quadrature Modulator comprises a Quadrature VCO (Yusynth VCLFO) and a "Dome Filter" (from J. Haible's Frequency Shifter)

The VCO portion has 3 potentiometers (coarse and fine frequency tuning and modulation CV attenuation), one CV input, 4 outputs and 4 LED indicators.

The dome filter section has one input and two outputs. The outputs are 90º phase shifted from each other. The video shows the waveforms from the VCO and Dome Filter on oscilloscope.

Differences from Yusynth Quadrature VCLFO are the capacitor value (1nF instead of 10nF), and changes in the freq control (fine tuning pot, reduction of the CV input resistor value).

It can operate at audio and sub audio ranges (0.2 to 4000 Hz approximately), but 1V/8ª tracking is only marginal (~2 octaves).

There is no significant differences in the dome filter circuit.

Some examples shown in the video:
Quadrature VCO controlling 4 VCOs, 1V/8ª CV for the Quadrature VCO input coming from the CV Quantizer.*
Frequency Shifter patch using the Quadrature Modulator and two Ring Modulators.*
Adding FM CV to Quatradure VCO (from the Arduino Clock Divider Logic Thing Octal DAC).*

Thanks for watching"

Yamaha TX81Z Waveforms on Oscilloscope

Published on Jun 11, 2019 Sbranvlztronics

"Capturing the waveforms from Yamaha TX81Z FM synth on an oscilloscope. The TX81Z, made in the 1980's, is a 4 operator frequency modulation digital synthesizer, with 8 waveforms options for each operator."

Yamaha TX81Z FM Synthesizer and Cakewalk StudioWare Panel

Published on Jun 9, 2019 Sbranvlztronics

"Testing a Cakewalk StudioWare panel made to program the Yamaha TX81Z 4 operators FM synthesizer. It works nicely on most parameters, some may cause a midi buffer overflow in the TX81Z, if tweaked fast..."

Frequency Shifter Patch: Oscilloscope and Spectrogram

Published on May 19, 2019 Sbranvlztronics

Follow-up to this post.

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

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."

Digisound 80-11A Ring Modulator (MC1496) plus Mixer and LFO

Published on Apr 7, 2019 Sbranvlztronics

"Digisound 80-11A Ring Modulator (MC1496) plus Mixer and LFO"

Another Electronotes / ASM based VCO

Published on Mar 3, 2019 Sbranvlztronics

"I've built an octal DAC to work with the Arduino Clock Divider Logic Thing, now I need 8 VCOs, VCFs ADSRs, VCAs, ultimately an 8 voices polyphonic system... This will take a long time to finish, here is the second VCO based on the Electronotes / ASM circuit."

8 DACs for the Arduino Clock Divider Logic Thing 1 Volt per Octave CV Outputs

Published on Feb 6, 2019 Sbranvlztronics

"Building an Octal DAC for the Arduino Clock Divider Logic Thing (DAC0800 8bit parallel input digital to analog converters). It will replicate the MIDI output in the V/8ª CV standard, in order to control analog VCO and VCF modules."

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"

Kind of a Wavefolder

Published on Dec 29, 2018 Sbranvlztronics

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ARP 4072 VCF yusynth clone - preview (assembled, prior to adjustments)

Published on Oct 1, 2018 Sbranvlztronics

"I've just finished to assemble the ARP VCF 4072 (YuSynth version) with some modifications, this is a preview prior to the adjustments (that will be shown next video). There is no modification to the filter section, I just added an attenuverter to CV2 input, 24db bandpass output and 12db lowpass output."