Yusynth ARP 4072 VCF clone bandpass response

Published on Sep 18, 2018 Sbranvlztronics

"In the previous video we tested adding a bandpass output to the ARP 4072 yusynth clone voltage controlled filter. This video shows the frequency response from the lowpass and bandpass outputs."

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"

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)"

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."

Frequency Shifter Patch: Oscilloscope and Spectrogram

Published on May 19, 2019 Sbranvlztronics

Follow-up to this post.

Yusynth ARP VCF 4072 on breadboard - Voltage Controlled Filter

Published on Sep 8, 2018 Sbranvlztronics

"Testing the Yusynth adaption of the ARP VCF 4072 on breadboard. No matched components were used here, it was just a test to listen the ARP VCF sound. I will test again with matched transistors pairs, resistors and capacitors, as the it sounds very nice."

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).*"

Let them play together - homemade analog modular synthesizers jam

Published on Sep 2, 2018 Sbranvlztronics

"The black modules (left) are the Arduino Clock Divider Logic thing and Arduino CV Quantizer top right is the MSB Modular Synth B. bottom right the Matrix II. The patch uses 8 LFOs, 4 VCOs, 5 ADSRs, 3 VCFs,6 VCAs, 1 VCDelay, 1 S&H. The CV Quantizer receives CV from 2 LFOs and send 1 volt per octave CV to VCOs and VCFs, the Clock Divider Logic thing is responsible for all gates (using 7 of the 8 logic outputs), its tempo is being controlled by CV coming from a Sample and Hold output."

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"

pedalboard

video upload by Unrelated Activities

Sbranvlztronics DIY pedal board synth.

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"

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."

Voltage Controlled Delay - Matrix II Homemade Analog Synthesizer

Published on Dec 12, 2017 Sbranvlztronics

"Voltage Controlled Delay - Matrix II Homemade Analog Synthesizer
A voltage controlled delay with 2 PT2399 integrated circuit."

ARP 4072 VCF Yusynth clone on Breadboard protoboard matched transistors, resistors & capacitors

Published on Sep 14, 2018 Sbranvlztronics

"I've built the ARP 4072 VCF (yusynth clone version) in another protoboard, this time using matched transistors (BC560), also matched resistors and capacitors. Next time I will try some modifications to the exponential converter and other little things."

Hippopotamus (another Arduino Clock/Divider/Logic thing test)

Published on Aug 25, 2018 Sbranvlztronics

"MIDI out to PC (drums, bass and other sampled instruments), first clock division output to the Arduino CV Quantizer controlling a basic patch on the Matrix analog synthesizer (VCO, VCF, ADSR,VCA, LFO)."

ARP ODYSSEY AR (Attack & Release) circuit on protoboard and some modifications

Published on Sep 25, 2018 Sbranvlztronics

"A look into a simple and useful control voltage generator circuit, some modifications and breadboard test. A perfect module to build for beginners in DIY electronics and analog synthesizers."

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."

Just the drones of boredom times - homemade analog synth

Published on Jun 13, 2018 Sbranvlztronics

"Messing around some modules: 3 VCOs, 2 LFOs, voltage controlled phaser, ladder VCF, voltage controlled delay (Matrix Analog Synth)..

Thanks for watching"

BANDPASS FOR THE ARP 4072 VCF YUSYNTH CLONE

Published on Sep 16, 2018 Sbranvlztronics

"Adding a bandpass output to the ARP 4072 yusynth clone, just one opamp and a few resistors.
Electronotes EN#85:
http://electronotes.netfirms.com/EN85...

Thanks for watching"

Introducing the MIDI to CV Converter (MBHP-CV) and a quick repair

Published on Jun 23, 2018 Sbranvlztronics

"The MIDIbox CV can convert MIDI messages to 8 CV and 8 Gate outputs. I added a monophonic analog synthesizer (VCO, VCF, VCA and VCADSR) to the MIDIbox so it can be used stand alone or controlling external analog modules.
I was having trouble with the menu navigation switches, so I replaced them and made this video showing the internals of the MBHP-CV.
A future video will show it at work.

For information about the MBHP (MIDIbox Hardware Platform, by Thorsten Klose) visit: http://wiki.midibox.org/doku.php?id=s...
or http://www.ucapps.de/

Thanks for watching."