Originally Posted by Silverprout
A tonality alteration... not only !
A lot of codecs as MP3 are based on perceptual algorithms (this is why they sound not good with inaccurate headphones)... like the mask effect, some frequencies can be masked by others.
Rise some frequencies can hide others and induce a loss of details ?
The masking is very and very very improtant phenomenon to my opinion, todays sound industry mostly based on it(recordings, theatre effects(dolby digital i.e.), some concert effects and usage of compressor(as I know, not sure completely) etc.). Therefore, in that area, it also important.
Too much bass with long decay time, it will be mask other sounds at midrange and bass( comes after earlier bass kick).
to my 2 cents