I read that youtube band limits the posted audio signal.

[rationaltime]

I posted about this in another discussion, but I think it deserves a separate thread.

This is about youtube band limiting the posted audio signal.

Here is the reference:
What is the Optimal Sampling Rate for Audio? (It's All About the Aliasing)
(The link starts at 15:48)

This is the key message:

Even though youtube does deliver 44.1 kilohertz to you
it puts a hard limiter at 16 kilohertz.

So any frequencies above 16 kilohertz get dialed to zero, nothing.

There's nothing above 16 kilohertz on youtube.

That is news to me.

 

[Mark1]

I think the bigger issue is it's compressed to what 256kb. Many probably can't hear over 16khz and if you can maybe it's better not to hear high frequencies that are that compressed .

 

[AlfaNovember]

Happily, I find it is not brickwalled at 16kHz. Picking slightly at random for a performance of the great big clanging "Great Gate of Kiev", I grabbed the audio from

re-encoded as wav, and ran it through MusicScope, where it goes past 16:

 

[unpluggged]

No need to download, reencode, etc. The spectrum analyzer on my RME and the DigiCheck software clearly show there is plenty of energy above 16 kHz when I play YouTube videos.

No need to duplicate threads, either.

 

[Old_School_Brad]

Debunked.

 

[ZolaIII]

Debunked.

View attachment 430714

And 20 KHz cut off is implied by Opus.