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This document (in the page QS300 Voices) contains a variety of the most important voice data, that are divided into several columns for better intelligibility. It's not possible to describe all voice information, so I decided to mention these: Program number (No.), Voice name, Number of voice elements (El), Voice category or general type of voice (Cat), Voice mode (Mode), Variation effect type (Variation) and Comment pool. If you look at "Sound lists and MIDI data" sheet, this is how Yamaha describes Preset and Factory user voices. In XG Voices table, there's an extra pool Bank number (Bn), that determines the XG Bank number. In some tables, if there is an image in the comment pool, it says, that the voice is taken from another voice set. In QS300 Voices title table, the number next to Voice-set name determines the number of voices in each set.

In the following tables there is the description of the voice categories (Cat) and the variation effect types (Var).