Ripped CD Spectrum -

[mrcd]

This is a an authentic commercial CD but the graph does not look like other audio CD's ripped. What's your opinion? Shouldn't a ripped CD at 320kbps be pushing upwards towards 20kHz and certainly not at 15KHz or less? All tracks on the CD have that line across and all registering just above 15kHz.

[garym]

Re: Ripped CD Spectrum -

There are some recorded CDs that simply don't have anything above about 15k. This could be one of those. There are cases of CDs being created from mp3 files (even commercial ones). Rare, but it happens. And of course all this depends on what sort of filters were used in the recording/mastering. Do you have other mp3 files that have top freqs > 15k. I always thought that most mp3 files didn't have much above 15k. That's one of the bits of evidence folks look at when they are trying to determine whether a lossless FLAC file is really just a copy of an mp3 file.

[mrcd]

Re: Ripped CD Spectrum -

Most of my mp3's look like this.

[garym]

Re: Ripped CD Spectrum -

what happens if you rip this to FLAC. perhaps the info above 15k is being removed by the mp3 codec (as it is determining using its perceptual model what one can "lose" without changing the sound). Looking at the FLAC would remove that issue, and if still cut off at 15k, that points to the recording itself.