When I try to make a note block song using repeaters, the timing is off and the sound falls apart. Even in a singleplayer world on a high end device with no lag-inducing machines or entities, the timing of the notes is unpredictable and random.

Steps to reproduce:
1. Build a chain of note blocks, their timing set by repeaters. Envision the timing of each note in your head.
2. Activate the tune and listen closely. Compare it with what you imagined.

Observed results: The timing of the note blocks is sometimes off by one game tick. This messes up the music and makes it sound out of rhythm.

Expected results: The timing of each note is not offset and is perfectly in rhythm.