el.delay(props, len, fb, x)

A variable-length delay line with a feedback component. Expects a props arg followed by three children:

1. The delay time in samples
2. A feedback coefficient on the range [-1, 1]
3. The signal to delay

Example:

el.delay({size: 44100}, el.ms2samps(len), fb, x)
 
// Adding a simple feedforward component
el.add(el.mul(ff, x), el.delay({size: 44100}, el.ms2samps(len), fb, x))

When fb = 0, this gives a simple signal delay. At small delay times, and with various feedback and feedforward components, this gives various comb filters. At larger delay times with fb > 0 this gives a simple feedback delay/echo. Adding a feedforward component ff = -fb, this gives an allpass filter.

Reference: https://ccrma.stanford.edu/~jos/pasp/Allpass_Two_Combs.html (opens in a new tab)

Props