This is where to walk through the files and the way wave files are structured on the DRV2667.
Graphics from datasheet and graphics from AKA are both needed.
One set of gfx will show the regions of the wave specified by each of the four types of byte
Another set of gfx will show the envelopes you can apply to those waveforms (will be shown on intentionally simple waveforms).
Short assignment might be - sketch out how to port Morse Code to this capability