The "Final Phase" is actually unbeatable for me... I tried and tried but I just don't see the worth in finishing anymore. so many "bullsh*t" deaths, I can't be bothered to try. First few Phases where fine, also I don't get how people are beating this and are talking about "Nightmare mode", the flash mechanic is overused for nearly EVERY enemy so trying to methodically play through it is practically impossible... I'm so bummed out because I really liked the game (up untill this final phase...)
I think you aren't respecting the sound meter like every other one who get stuck on the final phase, It's on me though, I should have explained that mechanic better, my bad! , when the sound meter is over 40% to 60% the sound character will get angrier and start progressing towards you, when it's 60% he will start getting progressing much faster, so try to keep it less than 40% :D