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KOACH · FUNs · Level 5 · Hidden LFOs · Lesson 5 of 14

ramp(f=−a*b)

ramps= a sawtooth at -25 × a × b Hz (falling for positive inputs)

A falling sawtooth LFO at 25 times a × b, in Hz. A positive rate gives a saw rising from -1 to +1, a negative one a falling saw.

SEE IT MOVE

SCOPE · LAST 2 S
THE WAVE · LAST 8 S
a0.00
b0.00
OUTPUT0.00

Computed in your browser with KINSPIRATION's FUN engine, step by step: this FUN keeps a state, so its output depends on what came before.

WHAT TO KNOW

INPUTS

As ramp(f=a*b).

OUTPUT RANGE

-1..+1, a sawtooth

USE IT FOR

The same controls as ramp(f=a*b) with a falling saw: decaying repeats.

WATCH OUT

Positive inputs give a falling saw; a negative product turns it back into a rising one.

IN THE FACTORY PROGRAMS

In 4 FUN slots of the factory programs: FUN1 4. GFUN2 and GFUN4 are the program's global FUNs.

MOST USED INPUTS (a, b)

MIDI24, ON2
ASR1, AMPENV2

WHERE THE OUTPUT GOES

PANNER Pan src2 depth control2
FUN3 a2

FIND THEM ON YOUR K2700

1012 Murmurslayer 3 · FUN1 · a MIDI24, b ON
447 Cosmic Sus Pedallayer 1 · FUN1 · a ASR1, b AMPENV

HOW TO ON YOUR K2700 · 1012 Murmurs

Murmurs uses ramp(f=-a*b) on its layer 3: see it, then where it goes.

  1. In Program mode choose 1012 Murmurs (KEYPAD, 1012, ENTER).

    Program mode with 1012 Murmurs

  2. Press EDIT, go to layer 3 with CHANNEL/LAYER ▲, then MORE and LFO+. The FUN1 row: Input a MIDI24 (Slider 5), Input b ON, Function ramp(f=-a*b).

    The LFO+ page of 1012 Murmurs, layer 3, the cursor on Function (ramp(f=-a*b))

  3. Where it goes: MORE, DSP MOD. On the Pan row FUN1 is the Depth Ctl: it sets Source 2's (LFO1) depth from 0 to 50.

    The DSP MOD page of 1012 Murmurs, layer 3, the cursor on Depth Ctl (FUN1)

  4. Move Slider 5 (MIDI24): the Pan row follows FUN1.

  5. Press EXIT and answer NO to leave the factory program as it was, or SAVE to keep your version on a USER ID.