Documentation for old sampler formats.
Documentation for E-MU's filesystem and E4 bank format; and the Roland S-50, S-550 and W-30, and S-7XX formats is fairly complete. These are only missing variables or data structures which can be safely ignored.
The E-MU EIII bank format is missing documentation for preset linking, which might affect the overall structure of the data.
The Akai formats were already reverse-engineered and documented by other people elsewhere. This repository contains my notes (which also point to their documentation), as well as my pattern files.