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KOACH · FUNs · Level 5 · Hidden LFOs · Lesson 4 of 14

ramp(f=a*b)

ramps= a sawtooth at 25 × a × b Hz

A 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

a: a controller (the speed knob); b: a constant that sets the top rate.

OUTPUT RANGE

-1..+1, a sawtooth

USE IT FOR

A ramp whose speed a controller sets from a standstill: MIDI24 × ON runs at 25 Hz × Slider 5.

WATCH OUT

With either input at 0 the ramp stops where it is; a 0.5 and b 0.5 give 6.25 Hz.

IN THE FACTORY PROGRAMS

In 2 FUN slots of the factory programs: FUN1 2. GFUN2 and GFUN4 are the program's global FUNs.

MOST USED INPUTS (a, b)

MIDI24, MIDI851
MIDI24, ON1

WHERE THE OUTPUT GOES

2POLE LOWPASS LP Frq src11
PARA MID Mid Frq src11

FIND THEM ON YOUR K2700

1012 Murmurslayer 1 · FUN1 · a MIDI24, b MIDI85

HOW TO ON YOUR K2700 · 1012 Murmurs

Murmurs uses ramp(f=a*b) on its layer 1: see it, then where it goes.

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

    Program mode with 1012 Murmurs

  2. Press EDIT, then MORE and LFO+. The FUN1 row: Input a MIDI24 (Slider 5), Input b MIDI85 (Button 5), Function ramp(f=a*b).

    The LFO+ page of 1012 Murmurs, layer 1, the cursor on Function (ramp(f=a*b))

  3. Where it goes: MORE, DSP MOD. On the LP Frq row Source 1 is FUN1, with a Depth of 2600 ct.

    The DSP MOD page of 1012 Murmurs, layer 1, the cursor on Source 1 (FUN1)

  4. Move Slider 5 (MIDI24). Press Button 5 (MIDI85): the LP Frq 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.