[oddlyaromatic]

An example of this is Chinese guqin tablature. It can be centuries old and includes a lot of detail on where to place fingers and how to strike the strings, which can give you hints about pitch and timbre when combined with knowing the tuning, strings, etc. But the tablature has almost nothing to say about the LENGTH of each note, so rhythm has to be inferred by the performer from what they know about the culture.