Gleix Video Synth #10 // Vimana

Semi-modular audiovisual synthesizer, feedback generator, composite VFX processor & analog video loopback.

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This device is model no. GVS010 and is the first in the series to feature a fully revised internal design & silkscreen printed front panels. All additional circuits have been consolidated into a single PCB (excluding the additional patch-panel PCB up top), and all controls are now PCB mounted as well. This is, moving forward, the standard build style that the GVS series will take as far as the feature selection on the front panel goes.

This machine contains just about every feature available in previous builds along with some new ones & some quality of life improvements. It’s designed for generating analog feedback looks, as a loopback with video mixers, and as a standalone glitchy video FX processor.

The I/O includes a composite video output, composite video input, a VGA output, an external audio input (1/8” and 1/4”), and a standard 2.1mm barrel jack for a 12v power supply.

I/O Panel

  • 12v power jack (2.1mm, center positive)

  • Composite video output

  • Composite video input

  • Selection switch (internal feedback loop VS external composite video input)

  • VGA video output

  • 1/8” audio input

  • 1/4” audio input

General features

  • On/off switch

  • NTSC/PAL selection switch

  • Image direction controls (up/down/left/right/zoom in & out)

  • Menu buttons for adjusting parameters (brightness/contrast/saturation/hue, etc…)

  • RGB mix knobs

  • RGB pulse buttons

  • Image freeze button

  • Image freeze switch

Oscillator

  • On/off switch

  • Speed range selection switch (low range = LFO, color flashes / high range = oscillator, scanlines)

  • Rate, shape, depth knobs

  • Send switches for red, green, blue

  • Send switch for image freeze (at slow oscillator speeds this will freeze the image in time with the oscillator, at high speeds this will act like a slit-scan effect)

Audio / Amp / Noise Generator

  • Internal audio amplifier on/off switch

    • Audio input will bypass amplifier and go directly to RGB sends if amplifier is off

    • Audio amp can generate noise if no audio is being sent to the device

  • RGB send knobs

CV

  • CV inputs for red, green, blue color channels

  • CV inputs for image direction up, down, left, right, zoom in/out

    • Directional CV inputs have bypass switches to easily kill the movement input

Patch Panel

  • 24 point patchbay for cross-patching to achieve glitches, receiving external signals, routing audio out of the machine

  • 4x switches routed to 2x patch points. For easily routing patch points to switches & turning connections on and off.

  • Additional menu buttons

Commissioned by and custom built for Avinash Kumar of Quicksand.co.in in India.

June, 2021.

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For video synthesizer commissions requests use this contact form.

If you’re interested in a DIY solution for a feedback-centric build, Lofi Future has an easy-to-follow guide on the basic set up for a no-input video feedback loop that can be expanded on in any number of ways. Be sure to check out Jonas Bers’ CHA/V as well for more experimental video resources!