"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."
"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."
"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."
"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."
"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."
"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."
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.
"Demo of a new DIY synthesizer module that can be used for creating rhythmic and melodic sequences as well as converting external rhythms into CV sequences."
"This module converts rhythmic patterns from gates into melodic CV sequences. It uses two 8 stage gate shift registers that can be combined to a single 16 stage. It can also be used as a standalone sequencer of rhythms and melodies.
Compatible with 12V or 15V systems, all jacks/switches are mounted on a PCB for no wiring when building in eurorack. Documentation has pinouts for the interboard connectors for people building in other formats."
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.
"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."
"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."
"Just a separate upload of the cover I did for my previous video. Just a sick song from one of my favorite shows. Recorded entirely on my modular synthesizer (with some supporting pads done with the KORG Polysix)"
"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"
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."
"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."
"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."
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
"Testing out some modules (outside the case). Patch is an ElectroSmith VCO with linear FM from Q106A sine which is sequenced by a SympleSEQ. Saw out from ElectroSmith to Barton BMC034 Switched Resistor VCF (built by Lower West Side Studio) running 2 low pass filters in series. Barton BMC034 is modulated by Encore Universal Event Generator running through the inverter on Q155 with inversion modulated by an audio frequency signal from SSL 1710 5-PULSER which is processing the same Q106A FM-ing the ElectroSmith VCO, introducing a pitch heard as the accented notes. The inverter output is then fed to the Curver section of Q155 modulated by a second Encore UEG. Simple, right? Ha-ha!
Q155 Curver is a really great module. Works great to add uniqueness to modulation signals and audio alike. I'm sure I'll find a place for it in every patch.
A minute into the video I introduce an inverted copy of the sequence controlling Q106A into the Clock input on the Barton BMC034. This is an experimental input on a very strange filter producing unexpected results. In this instance we get a sweet spot that produces truncated versions of the sequence because the filter freaks out creating dead zones. I like that kind of thing. \ (•◡•) /
Things fall into chaos when I exponentially FM the ElectroSmith VCO by another VCO running a different sequence which degenerates into the noise at the end.
"What's up everyone, Welcome to Midiverse - TV. Today we're going to be talking about a DIY Eurorack module that we recently finished building, this is the 4X Decay from Barton Musical Circuits. Let's check it out.."
