User Manual

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delay time for expression pedal control. N.B.: the TAP DIVIDE button functions
have no effect on the DELAY knob; pressing this TAP DIVIDE button while the
DELAY knob controls the delay time will not change the delay time.
FEEDBACK Knob – Controls the amount of signal that is circulated from the
output of the delay block to its input. Turning the FEEDBACK knob clockwise
increases the number of echoes. Setting the FEEDBACK control to its maximum
clockwise position will cause the DMM550 to run-away, or self-oscillate.
Alternatively setting the FEEDBACK knob to its minimum position will yield just
one echo or repeat for each of your notes. The FEEDBACK knob is also used to
set the maximum amount of feedback for expression pedal control.
DEPTH Knob – Sets the amount of modulation that is applied to the delay time.
As you turn the DEPTH knob clockwise, the amount of modulation increases.
Turn the DEPTH down to the full Counter-Clockwise (CCW) position to turn
modulation off. The DEPTH knob is also used to set the maximum amount of
modulation for expression pedal control.
RATE Knob – The RATE knob sets the rate or speed of modulation. As you turn
the RATE knob clockwise the modulation rate increases. The DEPTH knob must
be set above the full CCW position to hear the RATE knob change the modulation
speed. Additionally, the RATE knob sets the maximum rate of modulation for
expression pedal control.
GAIN Knob – Sets the input gain for the DMM550. As you turn the GAIN knob
clockwise, the input gain will increase. The total gain range is -13 dB to +20 dB.
The gain block is the first stage that the input signal goes through in the circuit.
Both the dry and wet signals mixed by the BLEND knob go through the gain
block.
BLEND Knob – The BLEND knob is a wet/dry control allowing you to vary the
mix between direct and delayed signals at the OUTPUT jack of the DMM550. Set
the BLEND knob to the full clockwise position for an output that is 100% wet. Set
the Blend knob to full counter-clockwise for an output that is 100% dry. Setting
BLEND anywhere in between will mix the wet and dry signals together.
Additionally the BLEND knob sets the maximum wet/dry mix for expression pedal
control.
SWITCHES & LEDs
BYPASS Footswitch and STATUS LED – The BYPASS FSW is used to toggle
the DMM550 between effect mode and true bypass mode. The red STATUS LED
will light up when in effect mode and turn off in bypass.
EXP. MODE Button and LEDs – The EXP. Mode button cycles through the six
available expression modes: BLEND, RATE, DEPTH, FEEDBACK, DELAY and OFF.
Each time you press the EXP. MODE button the DMM550 will advance to the next
expression mode LED. An expression pedal must be plugged into the EXP. PEDAL
jack to make use of these modes. A lit LED for one of the modes indicates the