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Afterimages

by Lisa Bella Donna

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1.
Night Moves 23:28
2.
Timeshapes 26:17
3.
Omni-Image 25:12
4.

about

Lisa Bella Donna: Moog Synthesizers & Sequencers,
ARP 2600, ARP Omni, ARP String Ensemble, Polymoog,
Farfisa Organ, Hammond Organ, Mellotron, Reel to Reels.

Written, recorded, and mixed by LBD
December 2020 / Appalachian Recording

SSL analog & digital equipment were used
exclusively throughout this recording.
Otari, Fostex, and Tascam tape recorders were used.

Cover artwork and photography: Jamie Suvak

Special thanks to: All at Moog Music Inc.
Lauten Audio, SSL, Focal Monitors, Hologram Electronics, Scheps Audio, Holland Synthesizer, Berklee School of Electronic Music Department, Audio Engineering Society, Kim Bjørn, Behind the Sky, and to everyone who has kindly supported this music and recordings.

credits

released December 19, 2020

“AFTERIMAGES”
ELECTRONIC REALIZATIONS FOR MAGNETIC TAPE
Equivalent to 2XLPs of recorded music.

“A record of long form modular synthesizer compositions. Deep meditations of sequencer based explorations. Concluding 2020 with a forceful, focused manifestation for global healing and astral ascension. Summoning the children of the new age. The endless roads and mountain passes evoke long reflections of life and times. The skyways and constellations are everlasting. Each altitude forming electromagnetic realizations of time and space. Frequency calculations of our quadrant phases soon shall reveal, beyond purgatorial gates onto ever evolving gardens in the modulations of the mind. Dawn soon unveils the omnipresent colors of our own summoning. The transcendental mirage at the rolling rivers of mysticism. Regain and rejoice these gardens of gratitude, for with each voyage they evoke afterimages of the distances between dreams.”

Love to All ~ LBD
December 2020 / Appalachian Mountains

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Further Obersvations...
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AFTERIMAGES -
SYNTHESIS OF THE MIND'S EYE...

There are two major types of afterimages: positive afterimages and negative afterimages. In some instances, the colors of the original stimulus are retained. This is known as a positive afterimage.

In other cases, the colors may be reversed. This is known as a negative afterimage. There are a number of situations that can increase the likelihood of experiencing an afterimage:

Brief exposure to a very bright stimulus, particularly when the surrounding conditions are much darker than the stimulus. Glancing at the bright midday sun or the glare of bright headlights at night are two instances that might produce this type of afterimage. This brief exposure to an intense source often produces a positive afterimage.
Prolonged exposure to a colored stimulus, even if the surrounding conditions are equally well-lit. Staring at an image in a book for 60 seconds or so before turning to stare at a blank, light-colored wall can produce this type of afterimage. This prolonged exposure to a colored stimulus often results in a negative afterimage.

Positive Afterimages...
In a positive afterimage, the colors of the original image are maintained. Essentially, the afterimage looks the same as the original image. You can experience a positive afterimage yourself by staring at a very brightly lit scene for a period of time and then closing your eyes.


For the briefest of moments, you will continue to "see" the original scene in the same colors and brightness. The exact mechanisms behind positive afterimages are not well understood, although researchers believe that the phenomenon might be related to retinal inertia.


The original image stimulates nerve impulses, and these impulses continue for a small window of time after you close your eyes or look away from the scene. The cells in the retina take some time to respond to light, and once the cells have been excited it takes some time for that response to cease.


While positive afterimages happen quite frequently, we are generally unaware of them because they are so brief, often lasting as little as 500 milliseconds.

Negative Afterimages...
In a negative afterimage, the colors you see are inverted from the original image. For example, if you stare for a long time at a red image, you will see a green afterimage. The appearance of negative afterimages can be explained by the opponent-process theory of color vision.

You can see an example of how the opponent-process works by trying the following activity. Draw an image of a red shamrock outlined in blue on a white piece of paper. Stare at the image for about one minute before shifting your gaze immediately to a white sheet of paper or a blank screen. After staring at the shamrock, you probably experienced a green and yellow afterimage for a very brief moment of time.

According to the opponent-process theory of color vision,
staring at the original red and blue image involved using the red and blue parts of the opponent-process cells.
After that minute of extended staring, the ability of these cells to fire action potential was exhausted. In other words, you briefly 'wore out' those red-blue cells.

When you shifted your focus to a blank, white screen, those cells were still unable to fire and only the green/yellow opponent-process cells continued to fire action potentials. Since the light reflecting off your screen could only activate those green and yellow cells, you experienced a brief afterimage in green and yellow rather than in red and blue.

Afterimages can be an interesting visual phenomenon to observe. They can also be an important tool for helping researchers better understand how color vision and the visual perceptual system work.

-VWM

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Lisa Bella Donna

Lisa Bella Donna is an internationally acclaimed composer, recording artist, modular synthesist & clinician.

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