Sorry i have to return to this very basic question.
But why PPQ, a division of note resolution into fractions of parts per quarter?
It is not a timedependent division until you add BPM?
Why is the resolution of the music BPM dependent "number of ticks per second variable".
Why just not settle for highest desirable ticks/second and lock in there?
Then changin BPM becomes a fractional measurement "note drift within ticks", but the ticks every second is the same.
Is there a musical or technical reason for letting the ticks per second drift between diffrent BPM's????
If so i would like an explanation because i really do not get it?
Maybe it is inheritance from the time the time resolution was really low, and quantization degree of music became high recording midi?