User Manual

SA248 Spectrum Intelligent Filter User Guide 12
ALT (Alternate) Button
The small black button located on the topside of the pedal next to the CONTROL INPUT jack. Pressing
the ALT button temporarily puts the pedal into Alternate Control Mode (indicated by the blinking ALT
Function LED). Alternate Control Mode switches from the Primary to Alternate function of each knob.
Moving the center toggle switch while the pedal is in Alternate Control Mode will change the Preset
Bank.
Engage / Bypass LED
The Engage / Bypass LED above the footswitch indicates if the effect is active (lit) or bypassed (not lit).
The color of this LED indicates whether the current preset is stored in the first bank (green LED) or
the second bank (Red LED).
The Engage / Bypass LED also plays a role when calibrating the INPUT level. Go to the INPUT/SENSE
Knob section of this manual for instructions on calibrating the INPUT level.
Alternate Function LED
The small LED located between the INPUT and DEPTH knobs is the Alternate (ALT) Parameter LED.
Pressing the ALT button puts the Spectrum into Alternate Parameter and Bank Switching mode,
indicated by the blinking LED. If a period of 6 seconds passes without moving any knobs or the toggle
switch, the Alternate Parameter LED will stop blinking and the knobs will return to their primary
parameter.
The Alternate Function LED also indicates (when lit solid/not blinking) that external control mode
(expression, hot hand, or MIDI) is active.
Footswitch
Enables or bypasses the effect. The footswitch is also used to toggle between the first (green LED)
and second (red LED) Preset Banks. Go to the Accessing the Green and Red Preset Banks section of
this manual for more info on changing Preset Banks.
The Spectrum Filters
Out of the box the Spectrum offers six expertly crafted filter effects. Select each filter with the three-
position Effect Toggle Switch. See the Accessing the Green and Red Preset Banks section for
instructions on changing between preset banks.
• Tron (Green Bank – Left Postion): Inspired by the timeless filter tones of Jerry Garcia, Bootsy
Collins, and Stevie Wonder, the Tron filter is our take on the coveted Mu-Tron III© of 1972. It
uses a lower resonance low-pass filter, and dynamically responsive envelope.
• Dumpling (Green Bank – Center Position): Another nod to an envelope filter
trailblazer, Dumpling is inspired by the Lovetone Meatball© of the mid 90’s. These higher
resonance, low-pass filter sounds can be heard on recordings by The Edge, Kirk Hammett,
Mike Gordon, and Ed O’Brien. It works especially well with bass guitar.
• Thrust (Green Bank – Right Position): Fatten up your sound with this Thrust! It includes
emulation the monophonic analog tones of the OC-2, when paired with a Notch, Low-Pass,
Peak filter, modulated by a quickly attacking and decaying envelope.