sc_lagud — Exponential Lag


Plugin opcode in scugens.

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


aout sc_lagud ain, klagup, klagdown
kout sc_lagud kin, klagup, klagdown


initialvalue If given, sets the internal state. Default=0


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.

This is essentially the same as sc_lag except that you can supply a different 60 dB time for when the signal goes up, from when the signal goes down. This is useful for smoothing out control signals, where "fade in" should be different from "fade out".


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

Example 878. Example of the sc_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 = sc_lagud(kx, 1.0, 0.1, 1)
  printks "x %f  x2 %f\n", 0.1, kx, kx2

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

sc_lag, port, portk


By: Eduardo Moguillansky 2017