Thanks, Ingo, for your reply. It is discouraging not to be able to determine lossiness then, without advanced equipment or software. Then, I'll go back to the wave analysis. There you can see the top and bottom cutoffs and the vertical bars that indicate some compression. How does anyone, then, determine that only lossless files go onto dime, trader's den, and spanish city.
I uploaded a file to spanish city a while back after looking at both wav and spectrum, and determined that it was lossless. One of the mods said it was lossy and banned it, but then another mod said it was lossless and it got back on. So when sound experts have a problem, how do the rest of us know.
Thanks for any additional information you can give me.