The dsp preamplifier has a digital delay with about 0.73 seconds delay. (Well its actually its 32767/48000 of a second) The delay also has a variable LPF (low pass filter) so you can set the crispness of the delays.
To conserve memory, and to extend the delay time, the delay is implemented in mono. Both the left and right signals are mixed together before they are sent to the delay. Then the delayed signal is mixed back into both channels.
When you __SELECT__ delay mode on the front panel, first four knobs get reassign to: