ifilcod -- sound file to be queried
ichnl (optional, default=0) -- channel to be used in calculating the peak value. Default is 0.
ichnl = 0 returns peak value of all channels
ichnl > 0 returns peak value of ichnl
filepeak returns the peak absolute value of the sound file ifilcod. Currently, filepeak supports only AIFF-C float files.
Here is an example of the filepeak opcode. It uses the files filepeak.orc, filepeak.sco, and mary.wav.
Example 1. Example of the filepeak opcode.
/* filepeak.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
; Print out the peak absolute value of the
; audio file "mary.wav".
ipeak filepeak "mary.wav"
print ipeak
endin
/* filepeak.orc */
/* filepeak.sco */
; Play Instrument #1 for 1 second.
i 1 0 1
e
/* filepeak.sco */
instr 1: ipeak = 0.307