I got some stuff from an online source and about 1/3 of what I got as FLAC showed as 320bps, but the rest showed exactly the same bps (example 811 reported versus 811 actual). But as a sanity check, I checked the program against my own collection of couple hundred albums in FLAC that I have ripped and a couple dozen came back as 320bps.
Most of these that came back as 320 are 80's and 90's pop/rock albums. It does report frequency as being above 20K (example 20498). Ripped with EAC to FLAC. Is 320 just a default number if it can't guarantee the reported bitrate?
I'm just wondering if there is something I can do or better understand how it's identifying. It's not all the songs from each album, it could be half, or even just 1 song in some cases.
EDIT: Ok, so I found that "Allow Cutoff Above" a certain frequency cleaned a lot of this up. I set it 20,000 and most went away. I still have some failures, that have low frequencies. If the source material doesn't have a lot of high frequency will this cause it to suspect the frequency is cutoff?
Oh also, does the more aggressive option make it more likely to find a FLAC as the correct bitrate, or less likely? It says it might find more fails, but is it just as likely to agree with the stated bit rate?
When "Fakin' The Funk" analyzes a FLAC file, then it expects the peak frequency to be around half of the Samplerate (when sampled with 44100 Hz, then they should reach up to 22050 Hz). Then it would say: Yes, it's a true flac.
When there is a kind of cutoff let's say around 20 kHz, then it still is a high quality file: MP3 with 320 kbps normally show a cutoff slightly below 20 kHz, therefore it asssumes that it MIGHT just be a transcoded MP3, not a true flac.
However, it is still a high quality file and it's up to you to decide...
But it might have todo something with the fact that it is related to older files. Maybe they really were mastered with not-so-high-quality equipment... I don't know...
The aggressive mode is more strict and allows less spikes. Especially it tends to report more files encoded with the Fraunhofer codec, because those frequency spectrums look very strange...