Spectrograms of vinyl- What am I seeing here?

[Bruno Republic]

For the first one, it's not unheard for some recordings to have resonant peaks or tones just outside of the normal hearing range. Sometimes this is the fault of the recording gear, sometimes it's something in the chain itself.

For the second, I'm only seeing the thumbnail so I can't make out where the roll-off is. Could be a digital delay unit used in vinyl mastering, could've been sourced from an early CD (which usually had sharp rolloff at 20KHz).

For the third, could be a digital delay in the cutting process (probably not if this is an original pressing, but could be a later re-cut) or it could just be a limitation of the recording gear. Some of New Order's mid-80s stuff is bandlimited to 17KHz. Perhaps they were so visionary that they foresaw a future where MP3 encoders would lop off everything above that.

[tkr]

Thank you!
No idea why the second one only came out as thumbnail- I will try to reupload.
I have this Jennifer Warnes LP in another edition as well. The spectrogram of that LP seems to be band limited as well- but at another cutoff frequency! All very strange to me.

yours tkr

[tkr]

New upload:
1) Jennifer Warnes Sonet LP

2) Jennifer Warnes 180 g LP

[Bruno Republic]

Looks to me like it's mastered from an old CD, although I can't really explain the difference between the two pressings.

I've seen this sort of bandlimiting before, like on this particular album: http://www.discogs.com/Tangerine-Dre...elease/2986910, which I am convinced was mastered from CD. If you zoom in on peaks, do the very top of the highs look to be slightly delayed as they near the cutoff point? I'm told that's usually evidence of the signal going through an analog brickwall filter, which were used in the early days of CD mastering to prevent aliasing.

On a tangent, I'm told the iTunes release of the album I linked to is itself a needle-drop.

[tkr]

Thank you again!
Seems that unsullied analog is anything but unsullied, or even analog-
Sort of puts a new spin on the whole analog/digital discussion.

yours tkr

Edit: Tried to zoom in on those highs, but I only saved the screenshots. Not enough resolution there to see anything useful.