A question about acoustic guitars.

Cafe Society
1

** Moderators - I cannot figure out how to link to JUST a few seconds so I’m linking an entire concert. Likely copyrighted. Help !! **

I’m watching a lovely video of Pink Floyd reunion show in England on July 2, 2005.

At exactly 12:42 in, there’s a close-up shot of an acoustic guitar. The hole is clearly filled with a black disk. Now, I understand well that this acoustic has what is likely the finest electric pick-up in the world installed into it. Is THAT what we’re seeing? And, if it is, wouldn’t a solid disk like that alter the quality of the sound? I mean, the man sounds like a god. Like always. So clearly the disk doesn’t muck up the sound.

What is it??

2

I believe that’s actually an acoustic guitar feedback eliminator. Something like this.

3

It’s a feedback reducer: D'Addario Screaching Halt Guitar Soundhole Plug | Musician's Friend

ETA: ninja’d!

4

And the pickup is more likely located in the bridge. Feedback reducers are essential on acoustic guitars when you’re playing at relatively high volumes.
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5

And how. My thanks !!!
Makes perfect sense.

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6

Early hollowbody electrics were archtop acoustic guitars with a pickup or two mounted to the soundboard, pickguard, or rails extending from the fingerboard. The soundboard was the best place to mount them structurally but at loud volumes they fed back like anything. THis became noticeable after WWII when amplifiers became loud enough to make the sound board vibrate. This is why the solid body and semi-hollowbody electric was invented.

Those disks in the sound holes of flat top acoustics make a sort of sealed chamber of the sound box muffling the vibrations of the sound board.

7

But there’s nothing muffled at all about the audio we are hearing. The picking is razor sharp and very clear.

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8

[Moderating]
Since there’s some question about copyright to the linked video: It is YouTube’s responsibility, not ours, to ensure that everything posted on their site is legal, and they take that responsibility seriously. Much of what is on YouTube is posted by the copyright owner, or otherwise with the owner’s permission, and we are not expected to tell which is which. Therefore, you may post links to YouTube without worry. The situation is different for websites which do not take copyright seriously, or which exist primarily for the purpose of violating copyright: Do not link to such sites at all.

That said, if you would like to link to a specific spot in a long video for the convenience of other users, you can put the video at that time, and then right-click it and select “Copy video URL at current time”. Paste that, and you’ll get something like Pink Floyd Live The Reunion Full Concert (Enhanced Video) - YouTube

9

THAT is a mighty useful trick !!
Thank you.

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