Convolution Reverb applies a real acoustic space to the signal by convolving it against an impulse response chosen from your IR library. The Dry/Wet control (0 to 1, default 0.35) balances the unprocessed and reverberant signals and the Output control (0 to 2, default 1) trims the level; a mute toggle silences the block. It works in mono and stereo, and in full stereo it runs a true four-path (left/right) convolution.
The impulse response is resampled to the graph's sample rate and run through a block-partitioned FFT convolver that is advanced one input sample at a time; each sample the wet result is mixed with the dry signal by the Dry/Wet setting and scaled by the Output gain. It processes one sample-frame per tick, in step with WaveWarp's sample-per-sample engine.