Hmmm..., LPs do have signal response above 20KHz...
In fact, this is one of the challenges for well designed analog front-ends: the cutting lathe can place a very high frequency sounds, including harmonic distortion, into the record grooves that then have to be dealt with effectively, for good and ill.
For some spectral analysis graphs, see:
http://users.bigpond.net.au/christie/comparo/part4.html
.
In fact, this is one of the challenges for well designed analog front-ends: the cutting lathe can place a very high frequency sounds, including harmonic distortion, into the record grooves that then have to be dealt with effectively, for good and ill.
For some spectral analysis graphs, see:
http://users.bigpond.net.au/christie/comparo/part4.html
.