The digital delay screen of the DEQ2496 gives independent delay control of the Main output and the Aux output. If Aux is selected, the digital delay applied will affect both the 1/4" Aux outputs as well as the Toslink S/PDIF output. In order to assign the delay to specific outputs go to the I/O screen and on page 4 you can use the B button to assign the delay to either MAIN or AUX.