The noise floor in guitar amps is much higher than in consumer electronics. So this can become an issue in quiet passages of songs which are using crunched/overdriven/distorted guitar tones (i.e., cranked guitar amps). There is no doubt things got much better in these days (w.r.t. noise handling).
I’ll give you a classic example. See at 1’30", before he hits the strings: 
In short, you’ll hear hissing and hum.
Cheers. 
I really like this song but I guess given the “loudness wars”, music producers tend to deliberately add (white/pink) noise at quiet passages of the songs in order to trick streaming/loudness algorithms. And this is unacceptable for my (OCD) ears when I listen to this kind of (artificial) artifacts. You just can’t unhear them. 
It happens a few times during the song below. First occurrence is from 18" to 35" when there’s just a piano + vocal passage.
https://music.youtube.com/watch?v=_AjpxUaJ5Sg
EDITS:
One should hear the musicians accommodating themselves at the start of the song. The cream of the crop is the guitar fret buzz at 18". Noticed with the HD600.
https://music.youtube.com/watch?v=d1QgQI83PQo
Love this song, btw.
Cheers. 
EDIT: Song is The Chain by Fleetwood Mac
Happy 
day!
(20 chars)
You Wear It Well by Rod Stewart, at 17", one can actually hear someone speaking in the background.
Heard with the HD 600.
Here’s a link:
I was playing with EQ with the HD800S tonight and then I heard some clipping in the Unchain the Night song by Dokken. WTF…
Clipping starts towards the end of the song, after 4’15". Here’s a link:
https://music.youtube.com/watch?v=qDyGLOUB6AE
It would be good to know if other stream services are suffering from the same issue. I only have YT Music as of today so I can’t compare.
I was just listening to One from “Achtung Baby” album (1991). There’s a considerable hum in the left channel when The Edge starts playing. This hum gets masked as song progresses but should be easily hearable between 2" to 14", until Bono starts singing.
Noticed with the HD800S.
Cheers.
OCD levels are skyrocketing today.
Knowing Me, Knowing You by ABBA, there’s a fret buzz at the very 2nd strum in the right channel (roughly at 1 second). Heard with the HD800S.
https://music.youtube.com/watch?v=_oAnFBiQng4
Cheers.
At 3’40". Is this the classic “fix in the mix” trick back in the analog days? There’s clearly a channel imbalance (or phase issue) happening at that specific second. 
Noticed with the HD800S.
Cheers.
Thank you Sir. In self-indulgence mode already. 
I’m having a milkshake on my cake day!
Congratulations to you too.
At 50". Suddenly the whole song gets centered. Before that it had a couple of dBs lower in the right channel. Heard with the HD 600. Confirmed the issue playing in mono with SoundID Reference.
I do have a legacy MP3 file of this song and the issue is not there. Most likely it was due the source that was originally ripped for Google. 
Too bad the consumers do not know when this kind of situation happens in a streaming service.
0:37 A bunch of stuff pans over into the left channel randomly… it’s like someone bumped a fader or pan pot and didn’t notice. Strangely, it’s not on the record I have of the album, only the digital version.
Well apart from that quirk… thanks for sharing this. Listening to it now…It’s fantastic. Don’t find much jazz I can get into but I Love this !!!
the whole album is great! Really made a splash when it came out, and they did one with yo-yo ma, andre previn, etc. but this one is the best I think.
This one is a classic:
Not really a blooper, but one can easily perceive the classic “raise the volume in the chorus” trick while in mix/mastering stage in the studio.
At 2’36", there’s a noticeable decrease in loudness, between 2-4 dB, and music becomes quieter.
Then at 3’12", close to the chorus, one can hear the faders going back up again. 
Initially perceived with the HD600 and a few hours later confirmed with the HD650.
Starts at 1’57". The first time I heard this I thought my equipment was going to the fritz. 
Holy crap. It is reproducible in both services:
I wonder if the label screwed things up while providing this file? 
