I'm new owner of a Tascam DR-22WL and I see it has two different functions aimed at reducing distortion at high input level (as far as I understand): limiter and peak reduction. However it is not clear to me how the two work and how they shall be used... I'm mainly interested in recording instruments (my clarinet and my son's flute) and concerts of the band where we play. Which of the two functions could I use and when? Moreover, I don't fully understand how the -12db light works and how use it... Thanks a lot for your help, I hope to get skilled enough soon in recording with my unit so to be able to answer to other users' questions, too!