Originally Posted by erkq
I'd be surprised. Information lost in lossy compression is phase, frequency response and masked sounds. It's unlikely there's any content above 8kHz or so. It may well be less than even that. Phase is important for imaging. There's no imaging in a mono track. And I don't think anyone can hear through masked sounds.
Also, I'm surprised you've heard a lossy and a loss-less Prisoner soundtrack already. Did you A/B them?
I'll take that question as sarcasm. Of course, I haven't. We wouldn't be having this discussion it the lossless soundtrack were available.
What I have heard is a lossless mono soundtrack (The Third Man) compared to many years of lossy mono soundtracks (e.g. Charade). They're not the same film, they're not even from the same era (but they were both released by Criterion, FWIW). The lossless soundtrack on The Third Man was much more clear and intelligible than Charade. As I said in a previous post, I'm assuming that the Prisoner's original soundtrack quality is good.
BTW, thanks for the info about phase, frequency response and masked sounds being lost. I learned something new.