Source Audio Soundblox Pro Bass Envelope Filter - Manual (Page 6)

6 | Features
FEATURES
The Soundblox Pro Bass Envelope Filter is a very flexible envelope filter
effect. The unit features multiple filter types ranging from simple to
complex, which can all be controlled by an Envelope Follower, an
LFO
(Low-Frequency Oscillator), the Hot Hand Motion Sensor or an Expres-
sion Pedal.
An Envelope Follower is an algorithm that responds to the amplitude (or
volume) of the incoming signal and creates a control signal based on the
input level. This control signal is used to modulate the filter to create an
auto-wah effect. (Note: The envelope follower signal can be reset to zero
between notes by a very brief moment of silence, allowing the next note
played to experience the full sweep of the filter effect all the way from its
starting point)
An LFO (low frequency oscillator) is an electronic signal that uses a
rhythmic pulse or sweep to create a control signal. This control signal
is used to modulate the filters of the
BEF Pro to create an oscillating
filter or sequencer-like effect. The BEF Pro also features a variety of LFO
shapes including sine, square, saw, step and triangle, each of which can
dramatically change the sound of the effect.
The Hot Hand Motion Sensor uses data from an accelerometer placed
inside a wearable ring to modulate the filters of the
BEF Pro. Either a
wired or wireless sensor can be plugged into the sensor input on the
back panel. After the sensor is plugged in, use the
MOD SOURCE button
to select “Hot Hand Mode”. At this point the controls take on slightly dif-
ferent functions. Note that the calibrate feature is intended for use with
the “Hot Hand Mode” only.
An Expression Pedal can be used to control a variety of selectable param-
eters in the
BEF Pro including direct filter modulation like a standard
wah pedal.
The BEF Pro features LO-RETAIN , an algorithm that alleviates the issue of
low-end “tone suck” commonly experienced with bass effects.