lagud — Exponential Lag


Plugin opcode in scugens.

Exponential lag with different smoothing time for up- and downgoing signals. Port of Supercollider's LagUD.

This is essentially the same as the opcode lag except that you can supply a different 60 dB time for ascending and descending signals. This is useful for smoothing out control signals, where "fade in" should be different from "fade out", or to model the attack/release of a gate, etc.


aout lagud ain, klagup, klagdown [, initialvalue]
kout lagud kin, klagup, klagdown [, initialvalue]


initialvalue If given, sets the internal state. Defaults to the first value passed


ain -- input signal

klagup -- 60 dB lag time in seconds for the upgoing signal.

klagdown -- 60 dB lag time in seconds for the downgoing signal.


Here is an example of the lagud opcode. It uses the file lagud.csd.

Example 512. Example of the lagud opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.


sr = 44100
ksmps = 128
nchnls = 2
0dbfs = 1.0

instr 1
  kx = randh(2, 1)
  kx2 = lagud(kx, 1.0, 0.1, 1)
  printks "x %f  x2 %f\n", 0.1, kx, kx2

instr 2
  kmidis[] fillarray 60, 65, 60, 65, 60
  ilen = lenarray(kmidis)
  kidx = int(linseg(0, ilen*2, ilen-0.00000001))
  kmidi = mtof(kmidis[kidx])
  afreq = lagud(a(kmidi), 1, 0.1)
  a0 = oscili(0.7, afreq)
  kfreq = lagud(kmidi, 1, 0.1)
  a1 = oscili(0.7, kfreq)
  outch 1, a0
  outch 2, a1

; i 1 0 10
i 2 0 12


See also

Standard Filters: Control signal filters


By: Eduardo Moguillansky 2017