Does mp3 have more bass information than m4a? 2019-02-16 21:57:16 I compared the same song in both formats in Spek and it seems like mp3 has cutted highs but more bass?!So, i just made some Screenshots to show you what it looks like. I used Foobar2000 to convert and i converted the original Flac to mp3 cbr 320kbps and to m4a (Nero AAC) vbr 400kbps. Then i put them into Spek and this is what they look like:Original Flac: Mp3: M4a: Then i opened the Flac and the mp3 in Audacity and inverted the mp3 to get the difference between both as result. I also did the same to the M4a.... What i got is 2 files with the informations that are gone in mp3 and m4a.This is what got lost in mp3 cpmpared to Flac: This is what got lost in M4a cpmpared to Flac: Because the last Screenshot (it shows information that is taken out in m4a) shows a lot more information in Bass, it seems like m4a would lack bass. Where does that come from? I also converted other Songs, and also tested Fdk AAC Codec with different bitrates, but the result always looks similar. I did this with Ogg Vorbis too, and it was also similar but not that extreme. Can it be possible that mp3 saves the most bass of them all??