ChainsawAsh said:

Presumably, right after Vader goes "The Emperor is not as forgiving as I am" and storms off, this scene begins, where Vader is continuing to storm off, arrives in his chamber-thing, and starts telepathically communicating to Luke.

I'm 98% sure that this isn't the full version of the scene, and it actually continues onward, with Luke giving R2 the lightsaber, then sending the droids off.

Then you'd cut to R2 and Threepio heading to Jabba's palace, and the film continues as normal from there.

do you also know the name of the soundtrack that plays in that scene