Alternate console flow for left and right reflection simulations. Multitrack equivalent of Middle-Side stereo microphone setup. Auxiliary bus send signal goes to single delay line which returns to both Left and Right stereo buses. Right channel return has signal inverted (polarity reversed). Left and Right return levels should be identical. Delay lengths should be between 10 and 50 milliseconds and usually only a few milliseconds different. Level of delayed signals should be to taste, but typical 6 dB below direct signal.