I spent half my professional career doing listening tests (MUSHRA and P.800), specifically on test items like Tom's diner. 128 kbps mp3 ist fairly easy to pick out, especially if you can compare it to the original. Double the bitrate and it's a real challenge.
Modern codes like opus are much more efficient. At high bitrates they are fully transparent and anybody who claims to be able to hear a difference is full of shit. Put them in a controlled setting and they fail every time.
Modern codes like opus are much more efficient. At high bitrates they are fully transparent and anybody who claims to be able to hear a difference is full of shit. Put them in a controlled setting and they fail every time.