Is your character literally singing, though, or are they simply causing the various musical effects to occur? If you wanted to get more specific, a tech-origin character could have devices produce the songs, a magical one could call upon spirits to produce the effects, a mutant one could possess multiple mouths, a science origin could have some kind of specialized serum that allows them to generate multiple soundwaves at once, and a natural-origin character could simply be a 1-man band...
This is a much more valid critique, IMHO - Either the toggles could be adjusted to account for this, or one simply needs to prioritize which toggles to run and when...