SetonixSynth Tidbit Audio Manual


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Side 1/3
Psychedelic Voltage Processor
Quad LED Chaos User’s Manual - Eurorack
Copyright 2023 SetonixSynth & Tidbit Audio. All rights reserved.
Hello and thank you for using the Psychedelic Voltage Processor for Eurorack, one of the first
collaborative modules from SetonixSynth and Tidbit Audio. We hope you will find its fluctuations most
pleasing!
The Psychedelic Voltage Processor, or PVP, is a four-channel chaos module. It uses color-changing LEDs
to produce fluctuating voltages in response to the Channel input, with each channel normalized in series
to create increasingly chaotic “taps” that can be used one after another for different variations.
Any positive voltage input such as unipolar LFOs, envelopes, stepped voltages, or simply the onboard
normalized voltage patched to a channel input is reproduced approximately on each channel output, with
the PVP inducing unpredictable fluctuations due to the variable current consumed by an LED circuit with a
mind of its own.
Technical Specifications (Eurorack standard)
Width: 8hp
Depth: 25mm
Peak Current Draw: 135mA @ +12V, 10mA @ -12V
Input Impedance (Channel 1): 150kΩ
Input Impedance (Channels 2-4): 100kΩ
Output Impedance (All Channels): 1kΩ, DC Coupled
1. Connecting your Psychedelic Voltage Processor
Before using the PVP, take extra note of the Peak Current Draw spec above. This module’s current draw
from the +12V rail depends largely upon the brightness of the LEDs and is continuously variable, but will
reach 120-135 mA on occasion. As such, it’s a good idea to double check that your Eurorack power
supply has at least this much current to spare at all times, or ideally a larger amount such as 250mA to
spare.
Connect a 10-to-16 pin ribbon power cable to the header at the top of the Psychedelic Voltage Processor
pcb. The -12V/red stripe side of the connector must be aligned with white stripe silkscreen indicator
labeled “-12V” for proper use. If your PVP has a shrouded power header, this will prevent you from
plugging it in the wrong way, so do not modify it. This module is reverse voltage protected, but it is still not
recommended that you plug it in backwards to see what happens.
2. Theory of Operation
The PVP began life as an active adaptation of the Tidbit Audio Random CV Processor. It uses similar
LEDs to those found in the Random CV Tidbit to create a chaotically fluctuating voltage signal that is
related to the input voltage, but utilizes the Eurorack format to expand on this circuit’s ability to provide
chaos and also create a visually-pleasing “window” with the panel of the module for viewing the workings
of the module. With this design, we hope to retain the original Tidbit’s minimalist appeal while also
creating something new and uniquely useful.
The Input/Output routing scheme of the PVP is designed to encourage messing around and happy
accidents, but there are just a few things to keep in mind while patching:
- The PVP responds to and processes positive input voltages only; negative voltage inputs are
ignored. It will also not output any voltage below 0V, and will act as a “half wave rectifier” on any


Produkt Specifikationer

Mærke: SetonixSynth
Kategori: Ikke kategoriseret
Model: Tidbit Audio

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