Frap Tools Falistri

Name: Falistri
Brand: Frap Tools

Dual function generator with divider, multiplier, and slew

18 HP Eurorack module

FALISTRI is a dual function generator capable of operating as envelope, LFO, or audio-rate oscillator, paired with a frequency divider, four-quadrant multiplier, and linear slew limiter. Its musical character is highly dynamic and interconnected, enabling complex modulation architectures from a single module. The two generators can be linked in quadrature or max configurations for rich, evolving modulation landscapes.

Features

Two independent function generators each capable of envelope, LFO, and audio-rate oscillator operation
Each generator has independent rise and fall time controls with CV inputs
Each generator has independent rise and fall shape controls
V/oct tracking input on each generator for oscillator pitch control
Bipolar, unipolar, and attenuverted outputs per generator
End of Rise (EOR) and End of Fall (EOF) gate outputs per generator
Force Loop input per generator for voltage-controlled looping
Quadrature mode links green generator 90 degrees behind yellow
Max output always outputs the higher of the two generator signals
Dual cascaded frequency divider (DCFD) with two independent channels and range switches
Four-quadrant multiplier (4QM) for amplitude modulation and ring modulation
4QM has a trimmer for DC offset and quadrant LED matrix for visual feedback

Controls & Jacks (60)

Yellow Rise Time— Controls the rise/attack duration for the yellow generator function
Yellow Fall Time— Controls the fall/decay duration for the yellow generator function
Yellow Trigger/Gate— Visual indicator showing when the yellow generator is triggered
Green Rise Time— Controls the rise/attack duration for the green generator function
Green Trigger/Gate— Visual indicator showing when the green generator is triggered
Green Fall Time— Controls the fall/decay duration for the green generator function
Yellow Rise Shape— Morphs the yellow rise stage between logarithmic, linear, and exponential curves
Yellow Fall Shape— Morphs the yellow fall stage between logarithmic, linear, and exponential curves
Green Rise Shape— Morphs the green rise stage between logarithmic, linear, and exponential curves
Yellow Trigger/Gate Input— Accepts external trigger or gate signal to activate the yellow generator
Green Rise Shape CV— Attenuverter for external CV control of green rise shape
Yellow Rise CV Input— External CV input to modulate yellow rise time
Yellow Fall CV Input— External CV input to modulate yellow fall time
Yellow V/oct Input— V/oct input to control yellow generator frequency
Yellow Time Scale Switch— Selects between slow time scale (envelope/LFO) and fast time scale (oscillator)
Yellow Play Mode Switch— Selects between Loop, Transient, and Hold modes for the yellow generator
Yellow Force Loop Input— Patching a positive voltage forces the yellow generator into loop mode
Green Trigger/Gate Input— Accepts external trigger or gate signal to activate the green generator
Green Rise CV Input— External CV input to modulate green rise time
Green Fall CV Input— External CV input to modulate green fall time
Green V/oct Input— V/oct input to control green generator frequency
Green Time Scale Switch— Selects between slow time scale (envelope/LFO) and fast time scale (oscillator)
Green Force Loop Input— Patching a positive voltage forces the green generator into loop mode
Yellow Bipolar Output— Bipolar output from yellow generator (±5V range)
Yellow Unipolar Output— Unipolar output from yellow generator (0/+10V range)
Yellow Attenuverted Output— Output of the yellow attenuverter control circuit
Yellow End of Rise— Gate output indicating when the yellow generator's rise stage ends
Yellow Attenuverter— Controls the amount and polarity of the yellow attenuverted output
Yellow End of Fall— Gate output indicating when the yellow generator's fall stage ends
Green Bipolar Output— Bipolar output from green generator (±5V range)
Green Unipolar Output— Unipolar output from green generator (0/+10V range)
Green Attenuverted Output— Output of the green attenuverter control circuit
Green Attenuverter— Controls the amount and polarity of the green attenuverted output
Green End of Rise— Gate output indicating when the green generator's rise stage ends
Green End of Fall— Gate output indicating when the green generator's fall stage ends
DCFD Input 1— First input to the dual cascaded frequency divider
DCFD Input 2— Second input to the dual cascaded frequency divider
DCFD Output 1— First divider output (/2 division)
DCFD Output 2— Second divider output (/4 division)
4QM Input 1— First input to the four-quadrant multiplier
4QM Input 2— Second input to the four-quadrant multiplier
4QM Output— Output of the four-quadrant multiplier
Yellow Trigger/Gate— Manual button to trigger the yellow generator without external input
Slew Rise— Visual indicator for slew limiter rise activity
Slew Fall— Visual indicator for slew limiter fall activity
Slew Limiter Input— Input to the linear slew limiter
Slew Limiter Output— Smoothed output from the slew limiter
Max Output— Outputs the higher value between the two attenuverted signals
Quadrature Enable— Enables quadrature mode to chain yellow and green generators into complex multi-stage envelopes
4QM Quadrant LED Matrix— Four-LED matrix showing which quadrant(s) are active
Green Trigger/Gate— Manual button to trigger the green generator without external input
DCFD Range 1— Selects unipolar (0-10V) or bipolar (±5V) output for the first divider
Yellow Trigger— Visual indicator showing when the yellow generator is triggered
Green Trigger— Visual indicator showing when the green generator is triggered
Yellow Time Scale— Selects between slow time scale (envelope/LFO) and fast time scale (oscillator)
Yellow Play Mode— Selects between Loop, Transient, and Hold modes for the yellow generator
Green Time Scale— Selects between slow time scale (envelope/LFO) and fast time scale (oscillator)
DCFD Range (Upper)— Selects unipolar (0-10V) or bipolar (±5V) output for the first divider
DCFD Range (Lower)— Selects unipolar (0-10V) or bipolar (±5V) output for the second divider
4QM Level— Controls the output level of the four-quadrant multiplier

How-To Guides

Classic Percussive Envelope
Quadrature LFO Pair
ADSR from Two Generators
Audio-Rate Triangle Oscillator
Ring Modulation Patch
Amplitude Modulation (AM) Patch
Clock Division for Rhythmic Variation
Portamento / Glide with Slew Limiter
Self-Generating Sequencer Trigger Chain
Hard-Sync Style FM Patch

Explore the interactive Falistri panel on BleepDex — tap any control to learn what it does.