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KOACH · FUNs · Level 6 · Odds and ends · Lesson 1 of 7

|a+b|

sums and mixes= |a + b|

The size of the sum: a negative result is turned positive, so the output is unipolar.

SEE IT MOVE

SCOPE · LAST 2 S
THE MAP · OUTPUT FOR EVERY a AND b
a0.00
b0.00
OUTPUT0.00

Computed in your browser with KINSPIRATION's FUN engine. Drag on the map to try any a and b.

WHAT TO KNOW

INPUTS

a: the source; b: an offset, often OFF.

OUTPUT RANGE

0..+1

USE IT FOR

Full-wave rectifying a bipolar source: |LFO + OFF| pulses twice per cycle, a tremolo at twice the LFO's rate; a bipolar controller whose either direction counts as more.

WATCH OUT

Inputs of opposite sign cancel before the fold: |0.5 + (−0.5)| is 0.

IN THE FACTORY PROGRAMS

No factory program uses it: one of the K2700's hidden tools.

HOW TO ON YOUR K2700 · 2046 Editor Template

The factory does not route |a+b| to a sound on its own: set one up on 2046 Editor Template and hear it on the pitch.

  1. In Program mode choose 2046 Editor Template, a plain one-layer program to build on (KEYPAD, 2046, ENTER).

    Program mode with 2046 Editor Template

  2. Press EDIT, then MORE and DSP MOD. On the Pitch row set Source 1 to FUN2 and its Depth to 1200 ct: FUN2's result, −1 to +1, now bends the pitch up to an octave either way.

    The DSP MOD page of 2046 Editor Template, layer 1, the cursor on Depth (1200 ct)

  3. MORE, then LFO+. On the FUN2 row set Input a to LFO1 and Input b to OFF.

    The LFO+ page of 2046 Editor Template, layer 1, the cursor on Input b (OFF)

  4. Move to Function and turn the Alpha Wheel to |a+b|.

    The LFO+ page of 2046 Editor Template, layer 1, the cursor on Function (|a+b|)

  5. Hold a note: the pitch rises to an octave and back twice in each cycle of LFO1 and never goes below the note: the sine folded up.

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