I think some of it is whether you're used to listening to the type of music. All those samples are types of music I don't normally listen to and thus scored 0%. They're also mostly low-information songs that are vocal-heavy. Vocal-heavy music is very easy to compress compared to say something like electronic or EDM type music which will easily create distortion with lower bitrates.
I got 4 / 6 with some old Apple EarPods plugged into my laptop. I think it was probably just luck, because I picked the 128kbps MP3 for both of the ones that I got wrong.
It's fun to think that I might be able to distinguish between uncompressed audio and 320kbps MP3. I didn't think it was possible. I had a hearing test recently, and they did say that I have better than average hearing. But yeah it was probably just random.
Whoa I just put on a nicer pair of headphones (Plantronics BackBeat Pro), and I think I might be able to tell the difference between uncompressed audio and 320kbps MP3.
The third one was really tricky so I had to guess. But the first two were a really clear difference. Uncompressed kind of sounds "fuller" and sharper, and MP3 is a bit flatter. It's a tiny difference but I think I can hear it.
