Just wanted to add that they don't have to be played loud.
When you first start out your stomach muscles and jaw muscles still have a
lot of developing to do. So at first you have to play loud you don't have a choice.
But then as you develop a 2 pack or a 4 pack depending on which sax, you can
control the flow of air better. Also you can grip the mouth piece properly so you
learn how to play quieter.
There are also different mouth pieces, some have a larger aperture for playing loud,
usually jazz players use them but the sound is harder to Control.
The mouth pieces which are more close up are easier to control the sound with and you
get a more classical sound. Then there is the ligature, the thing that holds the reed to
the mouth piece. Different ones and different pressure plates produce different sounds.
Its all very technical the sax! You have to find the right set up which suits you.
Playing the sax develops those abs and firms the jaw line, reduces wrinkles. Lol
Have I convinced you to try it yet!