Agreed. I am a wobbly tenor. A few semitones could do it. Google says the following. Perhaps the Albion media team can work on it....If only people would start singing it in the lower octave.
It sounds ridiculous when the tenors wobble down an octave when they let their "voices ring".
Falter more like.
You can change the key of a song digitally by using any digital audio workstation, or any other pitch shifting tools at your disposal. Moving the master file or all of the individual files of your track simultaneously up or down pitches will change keys in a song.