New Barton Musical Circuits BMC119 Digital Voltage Shift Register & BMC120 Digital Depth VCO

video upload by boogdish


video upload by boogdish

For more information visit bartonmusicalcircuits.com

New Barton Musical Circuits BMC118 Graphic Envelope

Demo video upload by boogdish

"New DIY Synth module. A graphic envelope generator. PCB/Panel/Microcontrollers are available on my site and a PDF with schematics/parts list etc https://www.bartonmusicalcircuits.com..."

"An envelope generator using slide pots like old graphic equalizers. Choose points in the envelope to loop during sustained portions. Use it as an LFO or as a normal step sequencer. A fun, tactile way of controlling modules. Compatible with 12V or 15V systems. Jacks are wired offboard, but all toggles and pots are mounted to the PCB. This design requires a slide pot from the Bourns PTL30 series, check for availibity before ordering."

New Barton Musical Circuits BMC117 Simple Square VCO

Demo video upload by boogdish

"New digital VCO design for beginners. PCB/PICs and the documentation PDF with schematic/part list/etc is at https://www.bartonmusicalcircuits.com..."

"An easy to build and easy to calibrate square wave VCO. Features 1V/O tuning, external CV input for modulation. Ideal for beginners or people needing a very small simple VCO to expand their system.

Compatible with 12V or 15V systems. The Pots are PCB mounted, but all other parts are mounted off board."

New Barton Musical Circuits BMC116 VC Burst Generator & BMC109 VC Distortion

video upload by boogdish

"Takes a gate/trigger input and outputs a burst of pulses. The amount and speed of the pulses are controlled with knobs and control voltages. Can be set to a specific number of pulses, a random number or pulses to fill up a specific amount of time.

Compatible with 12V or 15V systems. Can be used with 9mm or 16mm pots, my panel is designed for 16mm pots."


BMC109 VC Distortion Demo

video upload by boogdish

"A VCA circuit in series with a clipping circuit creates voltage controlled distortion. Two independent channels, can be used as a waveshaper or as a VCA that adds harmonics.

Compatible with 12V or 15V systems. The Pots are PCB mounted, but all other parts are mounted off board."

BMC114 Diode Break Shaper

video upload by boogdish

"New waveshaper module. PCBs are available for DIY builders. Links to documentation, mp3 sound samples and purchasing info are found at:
https://www.bartonmusicalcircuits.com..."

BMC114 Diode Break Shaper Schematic Walkthrough

"This module splits a waveform into 5 bands of voltage ranges and then mixes those bands together with attenuverters. The break points between bands can be controlled with external CV. This allows for harmonically complex outputs that remind me of strings and woodwinds.

Compatible with 12V or 15V systems. The Pots are PCB mounted, but all jacks are off-board."

BMC115 Resonance Loop VCF

video upload by boogdish

"New voltage controlled filter design. PCBs and pre-assembled modules are available through my website. Visit the following link to download build documetnation and learn how to order:
https://www.bartonmusicalcircuits.com..."

BMC115 Resonance Loop VCF schematic walkthrough

"This is a diode low pass filter with patch points within the resonance path. This allows you to patch the resonance audio path through a filter or VCA to create interesting and complex resonances.
Compatible with 12V or 15V systems. The Pots are PCB mounted, but all other parts are mounted off board."

BMC112 and BMC113 Demo video, Divided Sequencer and Voltage Compute

video upload by boogdish

"Demo for two new synthesizer modules. For more information on these please visit:
bartonmusicalcircuits.com/divseq/
bartonmusicalcircuits.com/4hp/voltcompute"

This module is an eight step CV sequencer with it’s 4 different outputs which change the outputted step at different rates with each output changing at half the speed of the previous output.

Compatible with 12V or 15V systems, panel components are PCB mounted, but pinouts for interboard connectors are labeled in schematic for building in other formats. Only has power footprint for Eurorack.

This is a CV processing module that analyzes voltages mathematically. It has outputs for highest, lowest, sum, difference, absolute difference and negative sum

Compatible with 12V or 15V systems, jacks are PCB mounted.

Barton Musical Circuits BMC111 CMOS CHIME

video uploads by boogdish

via Barton Musical Circuits

This is a percussive voice composed of four CMOS square wave oscillators with manual frequency controls. The harmonies between them create metallic chiming sounds. Two of the oscillators have mute switches to simplify the sound, and a loop toggle allows you to create repeating sounds.

Compatible with 12V or 15V systems, PC mounted pots, but jacks/toggles are offboard.

New Barton BMC108 Midi2CV Demo

video upload by boogdish

"A new DIY synthesizer module design. This lets you use a keyboard, sequencer or other MIDI controller with your modular synth. Two sets of CV/Gate/Trigger outputs with keyboard split, multiple note priority sets, bend inhibit and midi clock output."

via Barton Musical Circuits

"This is a two voice Midi to CV converter module. It has a keyboard split option allowing you to separate the keyboard into two separate synth voices, tune mode, multiple sets of note priorities for when more than two notes are played at the same time, options for inhibiting note bend on an individual output and output for the MIDI clock.

The PCB is set up for attached 3.5mm jacks and a detached MIDI input jack. If someone wanted to adapt it to a +/-15V system, no parts changes would be required."

Barton Musical Circuits BMC106 Resonant Glide

video upload by boogdish

via Barton Musical Circuits

"This module is composed of two Sallen-Key low pass filters designed to be used on very low frequencies. When pitch control voltages are processed through this, it creates a portamento which then turns into vibrato. Depending on resonance control, this vibrato can die out almost immediately or go on for the duration of the note. When used with envelope generators, this module can be used to add extra "bumpiness" to an envelope signal allowing for more harmonic content. With a gate signal, the module can be used as a simple envelope generator with equal sloped attack and release.

This design can be used with +/-15V systems without modification"

Barton Musical Circuits BMC107 Dual Comparator w/ Logic Outputs

video upload by boogdish

BMC107 Schematic Walkthrough. Dual Comparator W/Logic Outputs

video upload by boogdish

via Barton Musical Circuits
"This module is composed of two voltage controlled comparators which are gate outputs that turn on when an input voltage exceeds a threshold voltage. Four additional gate outputs turn off and on depending on the relative outputs of the comparators. This was initially designed as a way to add soft-sync features to VCOs that only have hard-sync, but has also been useful for turning envelope generators into gated loops

This design can be used with +/-15V systems with a few resistor value changes."

BMC105 JFET Phaser

Demonstration video upload by boogdish

BMC105 schematic walkthrough

via Barton Musical Circuits

"This module is a 12-stage phaser or all-pass filter with resonance control. When the filter’s output is mixed with the input, this creates notches in the frequency response. Classic phasing sounds are achieved by modulating the frequency control with an LFO. It can also be used as a 4-stage filter by removing the top PCB and jumpering pins 1 and 2 of the pin connectors together.

This module uses two circuit boards sandwhiched together. It's designed for 12V systems and can be easily modified for use with 15V systems."

BMC96 4LFO Demo/Jam

video upload by boogdish

"Demonstration/Jam using a new synth module. Other modules used are BMC018 Analog Drum, BMC100 Deluxe DAN and BMC074 Att-Off-Inv

To learn more or get a PCB, please visit https://www.bartonmusicalcircuits.com..."

via Barton Musical Circuits

"This is four LFOs in one module to effeciently add more up and down to patches. Each LFO has a range of 0.04 to 55hz and triangle/square output waveforms.

This module is designed for 12V systems but can be used with 15V systems by adjusting 8 resistor values."

New Barton Musical Circuits BMC093 Diode Shaper VCA & BMC092 Sample Release

BMC093 Diode Shaper VCA Demovideo upload by boogdish

"Demonstration/Overview of a new synthesizer module design.
I provide PCBs/Panels for DIY builders and also sell pre-built modules on my site. Visit https://www.bartonmusicalcircuits.com... to get more information on this module. PCBs and fully built modules can be ordered from: https://bartonmusicalcircuits.com/sho..."

This module is a VCA that uses rectified feedback/feedforward to provide waveshaping. Both the feedback/forward knobs can provide positive or negative feedback and the external CV control is an attenuverter. It also includes switchable Zener diode limiters to soften the output when large amounts of positive feedback are used. The module is DC coupled, so it can be used with LFOs, Envelopes and CV sources as well waveforms. The DC coupling also allows for DC offset to be applied to the input which increases harmonic possibilities.
This module is designed for 12V systems, but works with 15V systems with just one resistor change. The documentation gives tips on how to tweak or modify the circuit.


BMC092. Sample Release Demo video upload by boogdish

"This is a demo/overview of a new synthesizer module design. More information (schematics, ordering, etc) can be found at bartonmusicalcircuits.com/samplerelease/"

The Sample Release is a 4 channel bipolar envelope generator module that can also act as a sample-and-hold or track-and-hold. Each channel takes a voltage input, samples it and then that voltage goes to zero volts with it's rate controlled by the release knob. This generates control envelopes that fall when positive voltage inputs are applied and rise when negative voltage inputs are applied. Each channel has a toggle that disables the release function and lets the channel act as a traditional sample-and-hold or track-and-hold. Additionally, a +5V supply is normalized to the voltage input so the module can also be used as a normal release generator

Barton Musical Circuits BMC56 Utility Buttons Demo

Published on Apr 10, 2019 boogdish

"This is a demo for a new DIY synthesizer module I designed. If you're interested in building this, you can find ordering information, a documentation PDF and a front panel drill guide at http://www.bartonmusicalcircuits.com/..."

"Utility Buttons is a performance/controller module that provides gate/trigger outputs based on button presses. Buttons can be set to act as momentary, latching or tap tempo. Each channel has two outputs, one of which can be configured as a Multiple, inversion or trigger of the other output.

This module works on either 12V or 15V systems with no modification. The switches are mounted to the PCB to minimize wiring, but jacks are offboard so it can be easily used in multiple synthesizer formats. Outputs are +5V."

New Barton Musical Circuits Chordizer Module

Published on Aug 29, 2017 boogdish

"This is a DIY synthesizer project. If you're interested in building it yourself, the page for it is at http://www.bartonmusicalcircuits.com/..."

"This is a specialized module for controlling 1V/Octave oscillators and filters. A single CV input is offset and quantized to create 4 voice chords. Chord voicings can be saved and loaded using external CV. It also features a single slew control for all four outputs, random chord selection and more

The board features PC mounted pots for less wiring, and mounting holes for flexibility in panel layout. There are Eurorack and MOTM power connecters. It's compatible with 12V or 15V synth systems without any parts substitutions"

New Barton Musical Circuits 4 Quadrant Multiplier & Panner Module

Published on Aug 29, 2017 boogdish

"This is a DIY synthesizer module, if you're interested in building one for yourself, please visit http://www.bartonmusicalcircuits.com/..."

"This module is a specialized VCA that can act as a Four-Quadrant Multiplier (sometimes referred to as a 'Ring Mod') or as a panner.

The board features PC mounted pots for less wiring, and mounting holes for flexibility in panel layout. There are Eurorack and MOTM power connecters. It's compatible with 12V or 15V synth systems without any parts substitutions"

New Barton Musical Circuits Manual Voltages & Preset Rhythms DIY Modules

Published on Jun 12, 2017 boogdish

Update: details via Barton Musical Circuits:

"This module is a controller that uses a large knob to control pitch and a button to generate triggers and gates. It features internal Sample/Hold and Slew circuits. The PCB has MOTM and Eurorack style power connecters. The jacks are the only panel parts not PCB-Mounted making for easy wiring while being flexible for use in different synth formats. There are also mounting holes for using offboard pots/switches."



Published on Jun 13, 2017 boogdish

Update: details via Barton Musical Circuits:

"This module is a PIC-based rhythm generator inspired by old rhythm boxes and keyboard presets. Kick and Snare patterns are selected using the knobs. It features an internal clock but is compatible with an external clock. There are CV and trigger inputs for pattern selection allowing for an external sequencer to be used. It features Eurorack and MOTM style power connecters and can be used on either 12V or 15V systems without modification."

New Barton Musical Circuits DIY BMC48 Single Random Rhythm

Published on Feb 16, 2017 boogdish

via Barton Musical Circuits

"This is a single channel version of the BMC27 Random Rhythm module. It's a trimmed down, easier to use version that adds SAVE/LOAD functionality.

The board features PC mounted pots and LEDs, for less wiring and also mounting holes for flexibility. There are Eurorack and MOTM power connecters. It can be built in +/-12V or +/-15V systems without any modifications."

New Barton Musical Circuits DIY BMC49 Attenuverter Mixer

Published on Feb 16, 2017 boogdish

via Barton Musical Circuits

"This is a DC coupled, four channel attenuverting mixer. It is expandable to eight channels.

The board features PC mounted pots, for less wiring and also mounting holes for flexibility. There are Eurorack and MOTM power connecters. It can be built in +/-12V or +/-15V systems without any modifications."