FXAlgs #961/962: Tremolo and Tremolo BPM
Algorithm Reference-162
FXAlgs #961/962: Tremolo
and
Tremolo BPM
A stereo tremolo or auto-balance effect.
Allocation Units:
1
Tremolo and Tremolo BPM are 1-PAU stereo tremolo effects. In the classical sense, a tremolo is the rapid repetition
of a single note created by an instrument. Early music synthesists imitated this by using an LFO to modulate the
amplitude of a tone. This is the same concept as amplitude modulation, except that a tremolo usually implies that
the modulation rate is much slower.
Tremolo and Tremolo BPM provide six different LFO shapes, as follows:
LFO Shapes available for Tremolo and Tremolo BPM
An additional shape modifier is Ò50% WeightÓ. This bends the LFO shape up or down relative to its -6dB point. At
0dB, there is no change to the LFO shape. Positive values will bend the LFO up towards unity, while negative values
will bend it down towards full attenuation.
Action of the Ò50% WeightÓ parameter
Other features include ÒL/R PhaseÓ, which flips the LFO phase of the left channel for auto-balancing applications,
and LFO metering, which can be viewed on the bottom of the PARAM2 page.
Tremolo also includes an LFO rate scale for AM synthesis. Tremolo BPM provides tempo-based LFO syncing
including system syncing.
Sine
Saw+
Saw-
Pulse
Tri
Expon
PulseWidth
-6dB
+3dB
negative weighting
positive weighting
