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The most common wave types for Chorus will be Triangle, Random, and Sine. This is because these are the smoothest waves which will create the most gentle pitch changes. Envelope can sound good too.
On the other hand, Peak, Square, and Sample/Hold can create interesting more rhythmic sounds.
Finally SMP/HLD stands for sample and hold, which is kind of like a random square wave, and ADSR stands for Attack, Decay, Sustain, Release which is based on the style of triggered envelope that is common in many synthesizers. ADSR is like envelope, but instead of constantly changing based on your overall volume, it turns on if you get above a threshold and turns off if you go below it.