Empress Effects Tape Delay - Manual (Page 4)

The Tap Stompswitch
The tap stompswitch does different things depending on which
mode it's in.
Tap mode: When the delay time toggle is set to "tap", the Tape
Delay is in tap mode. The tap stompswitch is used to tap in a tempo.
The "d time|ratio" knob can be used to select various ratios of this
tempo.
Preset mode: When presets are enabled (see "Using Presets" and
"Advanced Configuration"), the tap stompswitch is used to toggle
through presets.
Non-tap mode with presets disabled: When the delay time toggle is
set to "slow" or "fast", and presets are disabled, the delay speed is
controlled by the d time|ratio knob. If blips are disabled (which is
the default behaviour), pressing the tap stompswitch erases the
audio in the delay line. This is useful if you want to play chords that
don't run into each other. If blips are enabled (see Advanced
Configuration), holding this down leads to some blips and blops..