On Sat, 28 Oct 2017 14:37:18 GMT, "Puffer Belly" wrote:
> There are no known hi-res sources for many of Uncle Phil's posts. I've
> downloaded a few dozen of his posts (various files, not whole albums)
> and checked the frequency spectrums with Audacity. All show a
> brickwall filter was used at 20 kHz, which means these posts are
> upconverted CDs (16 bits/44.1 kHz). There's nothing wrong with that
> as long as you know what you are getting, which are very large files
> of CD resolution music.
>
> If these posts had been ripped from analog sources (vinyl or tape), in
> case you were wondering, then there would be frequency content out to
> 30 kHz or higher and the roll off would be gradual, not a brickwall
> shape.
>
> Regards,
> PB
They are not even CD sourced. I loaded the Dean Martin Volare Collection. Load then in to Sonic Visualiser and clearly from MP3. You can see all the nonsense that mp3 make up above 15Khz.
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