Lower sound after update

[AC Question]

Yesterday I upgraded to the latest software on my S7 (SM - G930F) and it seems that I have a lower (not so loud) sound after the update. Lower sound when I get a call, when I play a YouTube video, when I type on the keyboard, lower sound on sent notifications on Whatsapp or Viber and even on calls (yes I know about the extra volume feature during calls but it's annoying to press it on every call). Did anyone else experience this or is it just me and how might I fix it? Thanks.