When several instruments play the same note, they are never perfectly together: tiny shifts in timing and tuning make the sound thicker. The Chorus copies this effect with a very short delay line (the same building block as the Delay) whose delay is swayed all the time by a built-in LFO. The delayed sound, slightly detuned by this movement, blends with the original.
The flanger is the same circuit set up another way: an even shorter delay, with part of the sound fed back into the line. Mixing the sound with its very close copy carves comb-shaped notches into the spectrum, and the swaying makes those notches travel: the "jet plane" sound.
Controls
- Mode: CHORUS (10 to 30 ms delay) or FLANGER (0.5 to 10 ms), shown at the top.
- Rate: how fast it sways, from 0.05 to 5 Hz.
- Depth: how far it sways within the mode's range; at zero, the delay stays still.
- Fdbk: feedback, in flanger mode only; negative values carve out other frequencies.
- Mix: the balance between the original sound and the delayed one; halfway, the effect is strongest.
The right LFO runs a quarter cycle behind the left one: the two sides never move together, and the sound opens up in stereo.
Inputs
- In L, In R: the sound to process (In R copies In L).
- Rate: CV for the speed (+1 V = twice as fast).
Outputs
- L, R: the processed sound, in stereo.