G-Lab Smooth Delay SD-1 User Manual page 11

If you use amp overdriven channel it is recommended to connect the SD-1 on the
amp effect loop. SD-1 can be connected to the serial or parallel loop.
Only in case of connecting the SD-1 to the parallel amp loop the KILL DRY and the
DS1 should be set to ON position. In other cases the KILL DRY switch and the DS1
should remain in OFF position. By reason of TRUE BYPASS it is recommended to
switch the effect ON/OFF by using the SD-1's footswitch or MIDI commands. It enables
to use the delay SOFT OFF MODE.
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