The second filter group and mod section are functionally identical to the first ones, but their impact on the sound is
dramatically different. By using both filter groups at once or only one of them, you can achieve substantial variations
in sound; even more so if you throw modulation into the mix.
The shelving HPF is the final touch to the signal chain. It prevents the Prism II from destroying your lows by reducing
the impact of resonant peaks in the lower frequency range.
Following all the processing, the resulting signal goes into the output mix section, where it is mixed with the dry
signal via the MIX knob. In Kill Dry mode, the MIX knob acts as the output volume control.
The Prism II has 12 algorithms (patches). Each patch may or may not use all of the device’s signal chain elements.
The Prism II patch library will be expanded over time; additionally, you can try programming your own algorithms
through the config file.
We are going to publish new patches on the Prism II support page and on social media, so stay tuned.
LFOs
The Prism II has four LFOs. Three of those control filter frequency and stereo width, while the fourth one controls
modulation. The rates for two of the LFOs are set by the RATE knob or TAP footswitch. The diagram and description
below will let you visualize the interactions better.
A complex set of LFO waves with extra waveshaping and cross-modulation controls filter cutoffs and movement in
the stereo field.
●
LFO MAIN
: triangle wave; rate is set via the RATE knob or TAP footswitch. This LFO controls the overall
movement but can be altered by LFO2 and LFO3, as well as by the LFO COMMON settings. This LFO’s phase
is reset when you turn on the effect and press the TAP footswitch.
●
LFO2
: sine wave; rate and amplitude are set via the config file (this LFO has no physical controls). This wave
is summed with LFO MAIN, adding some controlled chaos to its movement. Some patches don’t use this LFO.
●
LFO3
: saw/random wave; rate is linked to LFO MAIN rate at a certain ratio (such as 1/2x, 3x or 4x). This LFO
affects the other LFOs’ amplitudes by the following formula: LFO3*(LFO2+LFO MAIN). The result goes to LFO
COMMON, where it gets clipped by the limiter.
●
LFO COMMON
distorts the incoming wave, turning it into a trapezoid wave (at values 1.1–3) or an “almost
square” wave (at values 4–1000). This parameter is smoothed by a filter, which can let you achieve glide
effects.
LFO2 and LFO3 affect LFO MAIN at a set ratio and have extra settings in the config file. In EX mode, LFO MAIN is
disengaged and replaced by the ATTACK and DECAY parameters.
MOD LFO
is configured via the config file and has no physical controls. Its main purpose is soft modulation, which is
set differently for every patch.
Modulation Rate Setup
Use the RATE knob or TAP footswitch to set the mod rate in quarter notes, then use the BEAT switch if you wish to
turn those into triplets or dotted 8ths. You can also set your own tap division values through the config file. The TAP
LED displays the set LFO rate. The range of the RATE knob is 60 to 0.125s (
0,01666(6) – 8Hz
); the set rate can be sped
up via the BEAT switch.
