The Arpeggio (Category) abbreviations are found in the MOXF Reference Manual page 12.

But if you are referring to the code for the TYPES... it is somewhat helpful to know what the abbreviations mean, but not really essential, because you select them by ear. For example, when naming arpeggios there are *suggested* uses. It does not mean anything other than they are suggested for a particular role in your composition and the letters denote a level of complexity.

For example, if you combine Arpeggio Types for Drums, Bass, and Guitar that all were from the same genre, and prefix, you would recognize it as a specific coordinated piece of music. For example, a Bossa Nova Drum Type: Main A, with a Bossa Nova Bass Type: Main A, and Bossa Nova Guitar Type: Main A _ you will quickly notice that they are derived from the same piece of music. They work together like the source song they were derived from.

This data is derived from the Style engines found in Yamaha Arranger Workstations, where a STYLE is a group of phrases that together make up a particular source song. If you pick Standard Rock for each PART you will get an ensemble that goes together. But the way that the Arpeggios are different from the STYLE engine in the Arrangers is that with Arpeggios the concept is to mix and match different phrases to make new combinations.

Here's some clues on the abbreviation code:
The first letter is the musical description M is a main section, F is a Fill-in, B is a Break, I is an Introduction, E is an Ending
The second letter is the level of complexity... A being least complex and D being most complex.

MA = Main A section
MB = Main B section
MC = Main C section
MD = Main D section
each is a little more complex (busy) going from A to D

IA = Introduction type
FA = Fill-in A
FB = Fill-in B
FC = Fill-in C
etc. Each is more complex as you move A, B, C…

BA = Break A
and so on.

Just because an arpeggio is listed as a FILL-IN (FA, FB, FC, or FD) does not mean you can't use it as a main section of your composition... the whole purpose of providing these phrases (musical parts) separately is so that you can mix and match them to create totally new music. Additionally, by being individual Phrases you can transfer them (record them) to your tracks as you require, where you require them. rather than the STYLE type engine in a Tyros where you simply use them, pre-combined by genre, as a backing band for a specific result.

Both Arpeggios and Waveforms are basically finally selected by ear. The coded messages simply help organize them a bit.
There is no translation of the Waveform data (that I am aware of, but if you have specific question we'll attempt to translate it for you).