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Summary of Contents for Eon Procyon
- Page 1 Stereo Filter User Manual...
- Page 2 Contents Description / Features Installation / Specifications Interface Overview Soft Saturation VCA Filter: Core/Frequency Modulation/ Morphing Patch Examples - Stereo LowPass Gate - Mono to Stereo Filter Morphing Drone - Variable Bandwidth Bandpass Filter - “Wavefolded” Kick Drum - Wild No Input Mixing...
- Page 3 Description Procyon is a visual binary star system made of Procyon A, an F-type star roughly twice as big as the sun and Procyon B, a white dwarf star. The stars orbit around each other with a period of roughly 40 years.
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Page 4: Installation
2x8 pin header on your Eurorack power supply, confirming that the red stripe on the power cable is connected to -12V. 5. Mount the Procyon filter in your Eurorack synthesizer case. 6. Power your Eurorack synthesizer system on. Note: This module has reverse polarity protection. -
Page 5: Interface Overview
Interface Overview 1. Inputs 2. Outputs 3. VCA CV Input 4. VCA Gain/CV amount 5. VCA routing 6. Morphing CV Input 7. Parallel/Antiparallel Morphing 8. Morphing Control 9. Spread CV Input 10. Spread Mode 11. Spread CV attenuverter 12. FM CV Input 13. - Page 6 • Turning the knob anticlockwise will decrease the cutoff frequency. • If Procyon is used as a dual oscillator (self oscillation), the knob controls the base frequency of both oscillators. Resonance: The Q knob determines the amount of resonance applied at the cutoff frequency.
- Page 7 • The resonance path is bass compensated by design. No loss of subs when cranking it up ! Filter: Frequency Modulation Procyon’s control scheme has been designed for ease of use in stereo configuration. The frequency modulation section is made of the following: FM CV Input: The FM CV Input is a bipolar input (-5/+5V) for the cutoff/centre frequency.
- Page 8 Spread control will only offset the right channel frequency. Filter: Morphing Procyon’s filter response can be controlled by sending a definied amount of the input signals to either the lowpass or highpass input of each filter cell. Morphing: The Morph knob controls the response of both filter cells according to the morphing mode switch.
- Page 9 Patch Example: Stereo East Coast Voice Summary: The sequence controls the pitch of a stereo oscillator while simultaneously triggering an envelope generator. The envelope simultaneously opens the VCA and the lowpass filter. An LFO patched to the spread CV input adds stereo movement to the patch. “Key” tracking is also implemented in this patch by sending the sequence to the V/oct input.
- Page 10 Patch Example: Mono to Stereo Filter Morphing Drone Summary: This patch turn a simple mono waveform into a complex stereo drone voice. This is done by patching the waveform to both left and right inputs and modulating the FM, Spread and Morph controls with 3 different LFOs. These can be any shape and speed.
- Page 11 The spread control the width of the passband. Cranking up the resonance and playing with the Spread control will turn Procyon in a very formanty filter. OUTPUT AD env V/oct...
- Page 12 Patch Example: “Wavefolded” Kick Drum Summary: In this patch, both filters are kicked into self oscillation with a high gate during the pitch envelope Decay phase. The left cell oscillates at a low frequency and runs into the right filter which is set at a higher frequency with the spread control.
- Page 13 Patch Example: Wild No Input Mixing Summary: This last patch in very unpredictable ! It was discovered while patching with J.Manuel at Superbooth 2024. The patch relies on self patching the right output to the left input and monitoring the left output. The process is analoguous to a no input mixing console setup.
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