Sibilance is a natural occurrence in song/speech. 99% of the recordings I've experienced depict this (100% of the older live performances I've attended as well, prior to them receiving digital help/bandaids in the "near" real time).
Other than teeth/mouths/tounges it's also influenced by microphone usage skills.
Certainly it can be blocked/filtered by various means, but to do so will also be @ the detriment of other portions of the music.
My main speakers for 8 years were Ls3/5a's (the industry standard for reproducing speech) and they portrayed such S's with aplomb.
Too much, however is too much, but a certain amount is considered to be normal.
Other than teeth/mouths/tounges it's also influenced by microphone usage skills.
Certainly it can be blocked/filtered by various means, but to do so will also be @ the detriment of other portions of the music.
My main speakers for 8 years were Ls3/5a's (the industry standard for reproducing speech) and they portrayed such S's with aplomb.
Too much, however is too much, but a certain amount is considered to be normal.