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WMD Synchrodyne Eurorack Module
[synchrodynee]
$635.70

Introducing the WMD Synchrodyne, a multi part and multi use eurorack module for the creation and manipulation of audio. Containing several pieces to a traditional synthesizer voice, the Synchrodyne is a powerful addition to any subtractive oriented system. However, it is designed primarily as an experimental sound source/filter, intended to push the limits of modular synthesis...WMD style.

Front End Linear VCA
Switchable Four Stage WaveFolder
TempCo Sawcore VCO
Linear (AC/DC) & Expo (DC) FM
Bipolar Attenuators for FM
Calibrated 1V/Oct Input
Hard Sync Input
VCO Range ~.02Hz - >=400kHz
Phase Locked Loop
PLL Frequency Multiplier/Divider
Variable Slew & Damping in PLL
Switched Capacitor Filter
Multimode Filter Output
-12 & -24 dB/oct Output Taps
Stable Self-Oscillation at -24dB/oct
Voltage Control of Filter Resonance
Single Stage WaveFolder on Outs
Expandable
14HP, ~60mA Power Draw
100% Analog/Discrete/CMOS

The Synchrodyne is designed as a way to implement a switched capacitor filter (SCF) chip without the use of a microcontroller to run the clock. We developed a fast analog VCO that can drive the SCF with a broad range of frequency control. The problem with this would be that the VCO is then dedicated to only running the filter. So we designed a frequency multiplier based around a Phase Locked Loop IC (PLL) to take the VCO and multiply its frequency up so that the VCO could be used as an audio source, while still controlling the filter. The SCF has a frequency ratio of 50:1 or 100:1 clock frequency to output cutoff frequency. The PLL allows for many ratios of input to output frequencies to be selected, making the VCO a simultaneous audio and control source.

The PLL introduced its own challenges. Taming the PLL to stabilize at high multiplication ratios required us to develop a damping circuit. The Damping and Track Speed controls cause the PLL to have its own sound, sort of a slew limiter and self Frequency Modulation. We wanted the Synchrodyne to distort nicely with audio input, and also to self-oscillate. We added single stage rectifiers to the -12dB and -24dB filter outputs for a more aggressive sound. We opted to develop a VCA and wavefolder for the front end of the filter to further expand the palate of distortion and processing of the Synchrodyne. We had more features to add, but space was limited and we didn't want to make an excessively expensive module, so we added two 14pin expansion headers for future development.

 



For more information, please visit this products webpage.
For stock information, please email info@moogaudio.com.
This product was added to our catalog on Monday 16 July, 2012.
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