Source Audio Spectrum Intelligent Filter User Manual page 41

LFO 1 & 2
The LFOs (Low Frequency Oscillators) can be set to control the Filter modulation.
LFO Wave Shape Selector Dropdown Menu: Choose from 14 different LFO wave shapes.
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Each wave shape evokes a different character from the Filter and Tremolo modulation.
Choose from a range of sounds from a smooth Sine wave modulation to a choppier Square
wave modulation.
Restart on Env 1 Trigger Button: Selecting this button allows you restart an LFO pattern
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every time a new note is struck. This can be especially noticeable with slow moving LFO rates
or oddly shaped LFOs like the 4 Step or Rising Saw.
LFO Time Ratio Dropdown Menu: The Spectrum limits the user to one LFO wave shape at a
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time, but it is possible to run two LFOs at different Beat Divisions. For example, by selecting
"LFO 2 = 2x LFO 1," LFO 1 would run at a quarter note beat division while LFO 2 runs a 16
note beat division.
Speed Knob: Adjusts the rate of the LFO. Please note that if LFO 1 and LFO 2 are set to
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different beat divisions, both rates will increase or decrease to scale during Speed knob
adjustments.
Envelope To Speed: Relies on the envelope filter to increase and decrease the speed of the
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LFO. Turning this knob to the right causes the LFO to modulate faster as the envelope opens
then slow as the note fades and the envelope closes. Turning this knob to the right increases
the maximum LFO modulation rate.
Envelope to Depth Knob: Relies on the envelope filter to increase and decrease the depth of
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the LFO. Turning this knob to the right causes the LFO to modulate deeper as the envelope
opens then decrease as the note fades and the envelope closes. Turning this knob to the
right increases the maximum LFO modulation depth.
LFO 2 Phase Knob: Increases the phase offset of LFO 2 form LFO 1. Turning the knob all the
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way up creates a complete phase reversal between the two LFOs.
Tap Tempo Button: Tap this button in time with a drummer or rhythm track to override the
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Speed knob's setting and manually set the LFO rate. Please note that if LFO 1 and LFO 2 are
set to different beat divisions, both rates will increase or decrease to scale during Tap Tempo
adjustments.
Beat Division Dropdown Menu: Sets the beat division of LFO 1. Note that the beat division of
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LFO 2 is a sub-set of LFO 1 and it is set in the LFO Time Ratio Dropdown Menu.
SA248 Spectrum Intelligent Filter User Guide
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