filesr

Returns the sample rate of a sound file.

Syntax

ir filesr ifilcod [, iallowraw]

Initialization

ifilcod -- sound file to be queried

iallowraw -- (Optional) Allow raw sound files (default=1)

Performance

filesr returns the sample rate of the sound file ifilcod. filesr can return the sample rate of convolve and PVOC files if the iallowraw flag is not zero (it is non-zero by default).

Examples

Here is an example of the filesr opcode. It uses the file filesr.csd, and drumsMlp.wav.

<CsoundSynthesizer> 
<CsOptions> 
; Select audio/midi flags here according to platform
-odac     ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o filesr.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

;after an example from Jonathan Murphy

instr 1 
;load sound into an ftable
  Sfile     strcpy    "drumsMlp.wav" 
  ilen      filelen   Sfile 
  isr       filesr    Sfile 
  isamps    =  ilen * isr 
;adjust the length of the table to be a power of two closest
;to the actual size of the sound 
  isize     init      1 
loop: 
  isize     =  isize * 2 
  if (isize < isamps) igoto loop 
  itab      ftgen     0, 0, isize, 1, Sfile, 0, 0, 0 
prints  "sample rate = %f, size = %f\n", isr, isize ;prints them

endin 
</CsInstruments> 
<CsScore> 
i1 0 2
e 
</CsScore> 
</CsoundSynthesizer> 

The audio file “drumsMlp.wav” was sampled at 44.1 KHz. So filesr's output should include a line like this:

sample rate = 44100.000000, size = 131072.000000

See also

Sound File Queries

Credits

Author: Matt Ingalls
July 1999

New in Csound version 3.57