Frap Tools Falistri
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.
