What do the 4 Instrument icons mean?

[lviescas]

I think I understand the four squares means Drum Rack. The Rectangle with tick marks is a Sampler. What is the one with the two offset half circles and the one with three squiggles?

[[jur]]

Drift, and Wavetable.

[lviescas]

Thanks! I honestly read the manual, watched the videos. I guess they were added after the documentation was produced.