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Joined: Jul 2004
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I've had this idea for a long time and have mentioned this here before.

Instead of reading printed music on paper or reading images of printed paper displayed on tablets, it would be great if we could have an image projected onto our eye glasses or have an image appear as if it is in our field of vision.

Any thoughts?


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Originally Posted by Dave Horne
Any thoughts?

Microsoft HoloLens: https://www.microsoft.com/en-us/hololens

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Hello,

Such an idea makes me think of HUDs (Head Up Displays) that are used a lot in the aviation world.

Another thought: Apart from the experimental fun factor, Why? What for?

Cheers,

HZ

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Yep, that looks like something I'd like.

I guess I'll have to wait a few years until it's affordable and smaller. (I saw one price at $3,500.)


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Originally Posted by HZPiano
Hello,

Such an idea makes me think of HUDs (Head Up Displays) that are used a lot in the aviation world.

Another thought: Apart from the experimental fun factor, Why? What for?

Cheers,

HZ

It would make reading music a tad easier. I play a lot of ragtime music and don't feel like memorizing everything just to be able to look at my hands.

With a device that projects an image I could see through, I could do both more easily.


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I've been wanting something like that as a replacement for conventional computer displays.

Hololens performance is not adequate, and it's expensive.
I waited for years to see whether Magic Leap would work out, but when finally released it performed poorly and was far too expensive.

We may get our wish someday. But that day isn't today.

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On the other hand, you cannot shift your gaze from the score... It will be always in front of your eyes. I think it is an idea that will create a lot of eye strain.

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All these performers can sight read and turn pages on the fly. One way or another, it's perfectly doable using natural human functionality, as has been for centuries. Also I guess overcoming this "issue" can be a fun challenge.


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I wonder if the necessity of frequently repeated changes of focal distance (back and forth from 1/2 inch to 20+ inches) would strain the users eye muscles to the point of damage?

My guess is that pilot HUDs utilize color, rate of flashing, and other variables as part of the communicative language between pilot and computer so the pilot can receive some critical information instantaneously without having to engage in the slow process of reading. No focal distance shifting necessary. And, consequently, no eye fatigue or damage.

But, I'm guessing here. Does anyone here know?

Last edited by Ralphiano; 05/03/21 10:50 AM.

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I've used beta gizmos and found them to be great party tricks but irritating after a few minutes. Two friends worked on these types of systems with big tech companies and said results were "disappointing".

There was a lot more excitement around VR and AR say 7 years ago. But the available consumer technology was not up to the task. Beyond the component issues, maybe the whole concept is rubbish but the jury is still out on that question.

More recently, mobile phones have catalyzed cheap processing & fast, big high-resolution screens. So a lot of mass-produced technology is catching up. But I'm not sure if there will be another round of excitement around these gizmos so maybe the whole industry is DOA.

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Hello,

Originally Posted by Ralphiano
I wonder if the necessity of frequently repeated changes of focal distance (back and forth from 1/2 inch to 20+ inches) would strain the users eye muscles to the point of damage?

My guess is that pilot HUDs utilize color, rate of flashing, and other variables as part of the communicative language between pilot and computer so the pilot can receive some critical information instantaneously without having to engage in the slow process of reading. No focal distance shifting necessary. And, consequently, no eye fatigue or damage.

But, I'm guessing here. Does anyone here know?

To me, this seems a sharp observation and valid concerns.

As for aviation HUDs, these can present all sorts of essential flight information, such as airspeed, turn/bank indicator, vertical speed, altitude and so on. These are transparent screens that are close to (directly in front of) the windscreen, therefore much further away from the eye, thus not requiring such extreme focus shifts. They can be folded out of the way as well, somewhat similar to the sun visors in your car.

Cheers,

HZ

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HUDs have been in some cars too for a while now. And e.g. the VW ID.4 has some info projected onto the windshield instead of a separate piece of plexi glass.

But no sheet music. 😀

The HoloLens of course has head tracking, so the virtual sheet music could be placed in a certain spot in the augmented reality world and it then stays there until moved around. But is it better or even equally good as physical sheet music(?)

Anyway a coder would need to code an AR app to make any actual use of it, I guess.

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I think an approach that's used for welding might be adaptable. Rather than the traditional approach of looking at the actual weld through a dark lens, a video display is placed in front of the welders face inside the helmet. A camera displays the video image of the weld onto the display. I have used these at trade shows and they work well but they're still pretty expensive, although they don't use any advanced technology. It's basically just a video camera and a video display with some accommodations for the intense light levels. So you could play the piano with a screen in front of your face that projected the keys onto the screen as well as a line of two of music at the top of the display.


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Projection is not a good option. IIRC the Magic Leap is not a projector. It creates a light field ... so there's no concern over changing focus.

But I'm afraid np might be right about this ...
Originally Posted by newer player
I'm not sure if there will be another round of excitement around these gizmos so maybe the whole industry is DOA.
3D saw the same fate. It came to the movies in the 1950s, and died due to high cost and poor performance.
It came back decades later with a better performing system based on polarizers, but died once again for the same reasons.
And it came to television in 2010-ish with new tech ... and it died a third time for the same reasons.

So I'm sad and not hopeful about these new "augmented" reality devices.


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