another lossy/loss request

[vold911]

this is supposedly from a PREFM version of a show from 1978 that was later broadcasted
and yes i see the line just below 16k but theres also a secondary segment between 16k and 19k and i cant see obvious lego skyline

zoomed in spectral from cep




same with this one. taken from a different show. 1971. no obvious lego skyline and the dark part starts very low, though it seems more of a natural decline than abrupt change
any natural reason why a recording would seem to be so absent in the higher parts?

is this lossy?


this is from an audience recorded show in 1986. 2 versions. 1st lossless and second lossy?(distinct lego skyline)




and version 2 (lossy one?)

[co9ol]

don't know for sure about the first three, but that last one is lossy.
The second spectral don't look lossy, but it is missing a fair bit of top end.

[rspencer]

Microphones may have had an upper range only up to 16K. Not very uncommon, some mini-microphones being used today top out at 16-18K.

[bertrand]

First and last look bad, other two hard to tell without better info.