Help Verifying Lossless

[rakrimes]

Ok I've been collecting bootlegs for a little while, only recently I have been verifying that the Lossless files I get are in deed lossless.

I had been using TLH but got an error about track not being qualified which led me to google and discovered TLH is not always 100% accurate.

I Tried Analfreq but it constantly throws error I believe to be due to windows 10. So this led me to just learning to read the spectrograms to determine it and well I pretty much understand sharp cut offs at 16khz are a tell tale sign but I am still very new to reading the spectros, I use a program called Spek for that.

Below is a picture of one of the files and I want to say it is indeed lossless but I'm not 100% sure because I read 320K MP3s can cut at around 20.3Khz and this picture is close to that but also very jagged.

So I would love if someone could help me get the gist of these and also your opinion weather this is truly lossless or not.

Thank you

[Luke_of_Mass]

Is this from an FM recording ? kinda looks like it

[tonebloke]

Can you post a short audio sample.