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This audio CD is transparent
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Potato Lover 💾 No brain found lemmy.sdf.org user224@lemmy.sdf.org
Joined: 2023-06-17
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It's album named Virgin from Lorde. Not quite my taste of music, but the disc itself is pretty interesting.
Though it does have issues. Since the reflective layer is very thin, a lot of light passes through.

Even beaming through the lid:

Here's a blog post about it on Hackaday, also showing the lower signal amplitude compared to regular CD.
For me, so far it worked in 2 out of 4 CD players/drives. And I didn't even try with those that can't read CD-RW, as those can probably be crossed off right away.

Anyway, what happens when it's upside-down? Obviously, "doesn't work" is the answer. But at least we can see the lens dance a bit, trying to read the disc:

If you're worried about data consumption, this video is less than 300KB in size thanks to AV1. ^Although^ ^it^ ^took^ ^7^ ^minutes^ ^to^ ^encode...^

And something funny to add.
I ripped it once, there was weird noise, so I tried it again. I played random track, "David", and skipped through it. It sounded corrupted. So I tried playing it directly using VLC. Still the same. Thinking it was the drive, I tried my Discman. Same issue.
Is the disc bad?
But, after finally getting the track from the internet, I found it just sounds like that.

140   Original
FireWire400 lemmy.world FireWire400@lemmy.world
Joined: 2023-07-02
#2 · Quote Reply

I own a few Japanese SHM-CDs and they are similarly transparent, albeit with a green-ish tint, apparently to reduce reading errors (and the need for error correction) by limiting light scatter.

Out of all my CDs, those were among the most straight forward and fastest to copy to my SSD, so maybe they're onto something

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Aatube kbin.melroy.org Aatube@kbin.melroy.org
Joined: 2024-03-05
#3 · (edited) Quote Reply

it just sounds like that

that's the impact of brat for ya'

the effect at the end is what sells that song to me even though i also felt the album was a bit underwhelming

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thechosen2nd piefed.social thechosen2nd@piefed.social
Joined: 2026-02-03
#4 · Quote Reply

All CDs are transparente, this one just doesn't have a visual layer on it

4
k0e3 lemmy.ca k0e3@lemmy.ca
Joined: 2025-03-03
#5 · Quote Reply

The question is, does it sound as clear as it looks?

3
UnfortunateShort lemmy.world UnfortunateShort@lemmy.world
Joined: 2023-06-19
#6 · Quote Reply

All CDs are transparente, this one just doesn't have a visual layer on it

I don't know whether it is really all, but I can confirm that if you hold them in front of a strong light source, you can see it shine through many

3
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