BufDelayL: table of contents
Classes | UGens > Delays > Buffer

BufDelayL : BufDelayN : UGen : AbstractFunction : Object

Buffer based simple delay line with linear interpolation.
Source: Delays.sc


Simple delay line with linear interpolation which uses a buffer for its internal memory. See also BufDelayN which uses no interpolation, and BufDelayC which uses cubic interpolation. Cubic interpolation is more computationally expensive than linear, but more accurate.

Class Methods

BufDelayL.ar(buf: 0, in: 0, delaytime: 0.2, mul: 1, add: 0)

From superclass: BufDelayN

BufDelayL.kr(buf: 0, in: 0, delaytime: 0.2, mul: 1, add: 0)

From superclass: BufDelayN



Buffer number.

NOTE: The buffers provided to any of the BufDelay units must be one channel. If you want to delay a multichannel signal, you must provide as many separate (one-channel) buffers as there are input channels.

The input signal.


Delay time in seconds.


WARNING: For reasons of efficiency, the effective buffer size is limited to the previous power of two. So, if 44100 samples are allocated, the maximum delay would be 32768 samples.

Inherited class methods

Instance Methods

Inherited instance methods


// allocate buffer
b = Buffer.alloc(s,44100,1);

// Dust randomly triggers Decay to create an exponential
// decay envelope for the WhiteNoise input source
z = Decay.ar(Dust.ar(1,0.5), 0.3, WhiteNoise.ar);
BufDelayL.ar(b.bufnum, z, 0.2, 1, z); // input is mixed with delay via the add input


// multichannel

// two channels, two buffers
b = Buffer.allocConsecutive(2, s, 32768, 1);

a = { |bufs = #[0, 1]|
    var sig = SinOsc.ar([440, 880]) * Decay2.kr(Impulse.kr([2, 4]), 0.01, 0.15);
    sig + BufDelayL.ar(bufs, sig, delaytime: 0.125)
}.play(args: [bufs: b]);