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Notes: Another update for WMD's clever dual VCA, this time a little bigger to give more control. Digital control of CV and attenuation gives lots of creative options. Third time's a charm.

Supplier's Notes:
WMD have done several designs of this circuit over the years, the first one had no knobs, the second was too small, the MKIII is finally how this circuit should be packaged. This module does some really cool stuff and is super useful in any system.

The Digital VCA lets signal through like a normal VCA, but the CV and attenuation level is controlled digitally. This lets us do things like wait until there is a zero crossing to change the amplitude, resulting in clickless amplitude changes.

The Trigger mode causes the VCA to only update when a trigger is received. The addition of a noise circuit for each side let us do a very quick and easy sample and hold that never droops. With no input, 5V is normaled to the attenuator, so you get a 0-5V sample and hold. In Bipolar mode, you can get -5 to +5V.

Both sides have bipolar VCA mode (polarizer), which lets them invert the signal when negative CV comes in. Also known as ring modulation. With the zero crossing detector, this can produce some super wild wave shapes.

Features

Dual VCA Design
Unipolar or Bipolar Operation
DC Coupled Analogue Signal Path
Low Distortion / Low Noise
VCA Closes Completely
Zero Crossing Detector Mode
Trigger Mode
Two Independent Noise Sources
8 bit CV resolution
Great for Fast Envelopes and Sine Bass Sounds

Specifications

Power: +65mA, -45mA
Width: 8HP
Depth: 35mm with cables
Height: Eurorack 3U (128.5mm)
Board Height Behind Panel: 112mm
CV/Signal Input Impedance: 100k
Output Impedance: 1k
UPD in 3.3V Threshold Schmitt Trigger
ZCD produces 15us 5V pulse
5V CV to fully open VCA
Linear VCA response
20Vpp signal handling

Notes: LOCUTUS is designed to interface Assimil8or with MIDI instruments, controllers, and sequencers to provide multichannel modulation and new polyphonic possibilities.

LOCUTUS includes a special attached cable to connect to the Assimil8or CPU behind the panel.

LOCUTUS is 6 HP wide and 25mm deep.

MIDI sources connected to LOCUTUS’ MIDI IN port can be used to modulate Assimil8or parameters using velocity, channel pressure, and MIDI CC (Continuous Controller) messages, select presets using MIDI Program Change (PC) messages, and/or optionally trigger Assimil8or channels with MIDI notes using user-selectable assignment modes. MIDI Setups can be configured with assignment modes including Dynamic, which intelligently cycles through Assimil8or’s channels to easily create polyphonic patches, Multi assignment modes ideal for playing multitimbral Assimil8or patches with MIDI sequencers, SP-1200 modes designed especially for triggering Assimil8or with SP-1200’s MIDI output, and more.

Locutus’ MIDI OUT port can be used to optionally transmit program messages when presets are changed and/or to send MIDI CC data based on the analog control voltages patched to Assimil8or’s 24 CV inputs. Using the new CV-to-MIDI options, Assimil8or and Locutus can be configured to control and modulate MIDI equipment using a eurorack modular system.

Notes: Advanced generative sequencer featuring mutes per channel and transposition facilities.

Akropoli is an extension and enhancement of our successful Little Melody and High Towers modules, offering the features of both of these modules as well as some of it's own unique features such as mute buttons per channel, manual transpose knob and 1V/oct transpose CV input. Akropoli operates using Frequency Central's proprietary TOOL V2 code, and can count in integers as well as multiples for even more subtle and evolving variations.

Akropoli is a generative sequencer based around clock divisions and a chromatic quantiser, used to create in-the-moment licks and riffs. It is more that the sum of it's parts.

Akropoli's internal operations can be considered as 4 clock dividers patched into a CV mixer via attenuators. The attenuators select notes over a 5 octave range, the clock dividers determine how often those notes are added to the mix. The final output of Akropoli is quantized chromatically for fast set up and continuously pleasing results. Akropoli has an onboard transposition knob, as well as a 1V/oct transposition CV input.

The 4 clock dividers are labelled A, B, C, and D. They all receive clocks from the same source, the divisions may be selected using the presets and the individual division selectors. The clock dividers can be set to count up, down, or to one of a variety of modes that move between counting up and down. For further information on Presets and Modes see the Little Melody User Guide.

Additionally, each clock divider has it's own binary output (either high or low), these 4 outputs can be used to clock/gate/trigger other stuff on other modules to great effect.

Product Specifications

12V draw
50mA

-12V draw
36mA

5V draw
0mA

Depth
35mm

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***


A characteristically unique take on mixing from Buchla, with six mono inputs and a built-in mic/guitar pre-amp. Each channel can be cued to a monitor mix, while the first and last channels also include voltage-controlled panning.

Supplier's Notes:
The Tiptop 207t is a modern reimagining of the classic Don Buchla 207 Mixer/Preamplifier from the 1970s 200 Series. This stereo mixer comes with a built-in preamp that allows you to boost external instruments and microphones, making it a versatile tool for any modular setup. The 207t also features a six-channel mixer with a variety of signal routing options, including the ability to route channels to the monitor and L&R signal outputs, with per-channel control over loudness and panning.

Each channel has a Mon switch that sends the channel's signal to the monitor outputs, which are always full-volume and summed to mono, making it useful for basic monitoring applications or rudimentary mixing. The Prog switch sends the signal to the L&R signal outputs, with loudness controlled by the Level Adjustment slider and panning determined by the Channel Assignment knobs. The first and sixth channels offer voltage control of panning; these channels are hard-panned when no CV is applied.

The preamp section features a 1/4" input and multiple gain settings, making it suitable for use with external line level instruments, electric guitars, or dynamic microphones. The continuous amplification control provides added flexibility for your audio needs. Finally, the Expansion In is a stereo input that sums to the left and right main outputs, which is great for chaining multiple 207t modules or adding another stereo source at the final output.

While the 207t's functionality may be simple, it is an essential part of any 200t system, serving as the glue that holds everything together. The Tiptop 207t is a fantastic mixer/preamp option that delivers quality sound and reliable performance.

Buchla 207t Features

Mixer/preamp module based on Don Buchla's original 207 design
Six-channel mixer with per-channel level control and panning
Voltage-controllable panning on channels 1 and 6
Manual panning on channels 2-4
Program switches can act as channel mutes for main outputs
Mon switches route signal (in mono) to Monitor output
Expansion input useful for stereo chaining and more
Re-designed preamp for high audio fidelity
Preamp suitable for use with external instruments, electric guitars, dynamic microphones, and more

Eurorack module
28hp wide

Notes: Really clever stuff here. The Octaves VCO takes an additive approach, layering harmonics on top of a fundamental frequency to create complex tones. Control the six bands via CV to adjust the harmonic content.

Supplier's Notes:
A harsh and funky take of an additive Oscillator.

Pile up multiplications of your frequency to get a lo-fi-retro wall of squared sound!

You get six doubled frequency pulses, or octaves, with common PWM and volume control for each of them.

The output of each is cascaded to the next one, so you can either have one output with all frequencies or break the chain and get several sums and modulate each independently!

Features
Six bands, multiple of the base frequency.
Square wave oscillator with Octaves selector PWM control and sync.
Range control for Tune pot.
Volume CV control and individual output for each band
Cascaded summing outputs.

Specifications
Current needs: +12V: 110mA, -12V: 84mA
Width: 12 HP
Depth: 22mm (assembled and DIY), including power connector
Aluminium, heat-treated front panel
Designed, kits prepared and completed modules assembled in Barcelona