[Five]

diggrd, what I am suggesting is that CEP 2.0+ has a little bug where you have to click on the waveform to get the correct fa to display. Then you can select all or move the cursor and the originally displayed fa never comes back (the one with the flatline above 14KhZ).

62v8, you are correct about this. FM cuts off around the same place, but not quite so abruptly. The slope on the fa will be less steep, and in spectral view the tops of the spikes will be more uneven. Furthermore, when you zoom in you shouldn't be able to find any "blocks". 32kHz DAT cuts off in much the same way and can be checked in much the same way. TV-sourced stuff usually has the famous red stripe visible roundabout 16kHz and will cut off unevenly like FM somwhere just below that. The fa will show a spike where the red stripe is too. There will normally be at least a little bit of activity (99% noise) above 16kHz, with the possible exception of 32kHz DAT digitally transferred. These ones it's extra-important to zoom in and check for those giveaway lossy lego blocks visible in the sa.

FM, TV and 32kHz DAT all have mostly no activity above 16kHz, but they are superior to lossy sources because they are free from audible lossy aritifacts like slurring of hihats and those little noises that are like scifi movie sound fx.