This searched 49,837 sections. Section data only exists for audio that has been through the analyser on this box, which is a much smaller set than the song list.
measured means I ran the audio through the analyser on
this box: 39 songs.
inherited means the number came from somewhere else
and that source is named. They are never averaged together.
Vocals or not on a section comes from published timings of when someone
sings, not from listening to the sound.