Specifications

Chapter 66: Recti-Fi 325
Alternating Rectification This alternates be-
tween rectifying the phase of the first negative
waveform excursion to positive, then the next
positive excursion to negative, and so on,
throughout the waveform. The audible effect is a
halving of the audio signal’s frequency, creating
a subharmonic tone.
Alt-Max Rectification This alternates between
holding the maximum value of the first positive
excursion through the negative excursion pe-
riod, switching to rectify the next positive ex-
cursion, and holding its peak negative value un-
til the next zero crossing. The audible effect is a
halving of the audio signal’s frequency, and cre-
ating a subharmonic tone with a hollow, square
wave-like timbre.
Recti-Fi Gain Control
Gain lets you adjust signal level before the audio
reaches the Post-Filter. This is particularly use-
ful for restoring unity gain if you have used the
Pre-Filter to cut off high frequencies prior to
rectification. The range of this control is from
–18dB to +18dB.
Recti-Fi Post-Filter
Waveform rectification, particularly alternating
rectification, typically produces a great number
of harmonics. The Post Filter control lets you re-
move harmonics above the cutoff frequency and
smooth out the sound. This is useful for filtering
audio that contains subharmonics. To create
classic subharmonic synthesis effects, set the
Pre-Filter and Post-Filter to a relatively low fre-
quency.
The range of the Post-Filter control is 43 Hz to
21 kHz, with a maximum value of Thru (which
effectively means bypass).
Recti-Fi Mix Control
Mix adjusts the mix of the rectified waveform
with the original, unprocessed waveform.
Recti-Fi Output Meter
The Output Meter indicates the output level of
the processed signal. Note that this meter indi-
cates the output level of the signal—not the in-
put level. If this meter clips, the signal may have
clipped on input before it reached Recti-Fi.
Monitor your send or insert signal levels closely
to prevent this from happening.
Alternating rectification
Alt-Max rectification