kAverageAmp -- Average amplitude value of vibrato
kAverageFreq -- Average frequency value of vibrato (in cps)
vibr is an easier-to-use version of vibrato. It has the same generation-engine of vibrato, but the parameters corresponding to missing input arguments are hard-coded to default values.
Here is an example of the vibr opcode. It uses the files vibr.orc and vibr.sco.
Example 15-1. Example of the vibr opcode.
/* vibr.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
; Create a vibrato waveform.
kaverageamp init 7500
kaveragefreq init 5
ifn = 1
kvamp vibr kaverageamp, kaveragefreq, ifn
; Generate a tone including the vibrato.
a1 oscili 10000+kvamp, 440, 2
out a1
endin
/* vibr.orc */
/* vibr.sco */
; Table #1, a sine wave for the vibrato.
f 1 0 256 10 1
; Table #1, a sine wave for the oscillator.
f 2 0 16384 10 1
; Play Instrument #1 for 2 seconds.
i 1 0 2
e
/* vibr.sco */