Would need the music in there to hear how you sound with it. The two samples both sound like they wander, and seem to be in different keys!

Going by the graph can be misleading, when you take in account for any vibrato, and how we transition from not to note. I bet if you put that machine on many songs before pitch control, we would find many pro singers we all love with the same off the center lines.

Like guitars, who's notes can bend and go between notes as they get to another,,,so can vocals, since we sing NOT like how piano notes are played, which are exactly a half tone between notes! We have a hundred or so inbetween notes we can be at between half tone notes! Flex, like a fretless bass or any fretless instrument! WE are not pianos!!!! Saying that,,,obvious off notes can be tweaked back on the note of course with pitch control. But don't go crazy with thinking every sound of your voice has to be dead center.

So, let us hear your singing of that song with the music,,,and we won't need a machine to let you know if you sound on for that song or not,,and as to where it might bug us.

Johnny D