Abstract Chamber is a super-simple reverb plugin, at least as far as interface goes.
It is designed for longer modulated reverbs, while trying to maintain a natural yet abstract spatial impression.
On the left we have the usual predelay, then reverb time that gives theoretical mid-frequency RT60 and modulation that controls both the depth and rate of internal modulation; at low settings mostly the depth, at high settings mostly the rate (try 60-70% with RT between 6 to 10 seconds).
On the right we have LF damp which controls the cutoff of low-frequency damping, where as HF cutoff and HF decay control the damping at high frequencies.
Finally there's an output level control and a mode switch: insert mode will mix the reverb with the dry signal where as with send mode the output will be wet only.