| fadew {seewave} | R Documentation |
This function applies a “fade in” and/or a “fade out” to a time wave following a linear, exponential or cosinus-like shape.
fadew(wave, f, din = 0, dout = 0, shape = "linear", plot = FALSE, listen = FALSE, Sample = FALSE, ...)
wave |
data describing a time wave
or a Sample object generated loading a wav file
with loadSample (package sound). |
f |
sampling frequency of wave (in Hz).
Does not need to be specified if wave is a Sample object. |
din |
fade in duration |
dout |
fade out duration |
shape |
fade shape, "linear", "exp" for exponential,
"cos" for cosinus-like, (by default "linear") |
plot |
logical, if TRUE returns an oscillographic plot of the wave
modified (by default FALSE). |
listen |
if TRUE the new sound is played back. |
Sample |
if TRUE and plot is FALSE
returns an object of class Sample |
... |
other oscillo graphical parameters. |
If plot is FALSE, a new wave is returned as a one-column matrix
or as a Sample object if Sample is TRUE.
Jérôme Sueur sueur@mnhn.fr
oscillo, addsilw, cutw,
deletew,mutew, pastew, revw,
zapsilw
a<-noise(d=5,f=4000)
op<-par(mfrow=c(3,1))
fadew(a,f=4000,din=1,dout=2,plot=TRUE,title="Linear",cexlab=0.8)
fadew(a,f=4000,din=1,dout=2,shape="exp",plot=TRUE,title="Exponential shape",
colwave="blue",coltitle="blue",cexlab=0.8)
fadew(a,f=4000,din=1,dout=2,shape="cos",plot=TRUE,title="Cosinus-like shape",
colwave="red",coltitle="red",cexlab=0.8)
par(op)