ftchnls

ftchnls --  Returns the number of channels in a stored function table.

Description

Returns the number of channels in a stored function table.

Syntax

ftchnls(x) (init-rate args only)

Performance

Returns the number of channels of a GEN01 table, determined from the header of the original file. If the original file has no header or the table was not created by these GEN01, ftchnls returns -1.

Examples

Here is an example of the ftchnls opcode. It uses the files ftchnls.orc, ftchnls.sco, and mary.wav.

Example 1. Example of the ftchnls opcode.

/* ftchnls.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1

; Instrument #1.
instr 1
  ; Print out the number of channels in Table #1.
  ichnls = ftchnls(1)
  print ichnls
endin
/* ftchnls.orc */
        
/* ftchnls.sco */
; Table #1: Use an audio file, Csound will determine its size.
f 1 0 0 1 "mary.wav" 0 0 0

; Play Instrument #1 for 1 second.
i 1 0 1
e
/* ftchnls.sco */
        
Since the audio file "mary.wav" is monophonic (1 channel), its output should include a line like this:
instr 1:  ichnls = 1.000
      

See Also

ftlen, ftlptim, ftsr, nsamp

Credits

Author: Chris McCormick
Perth, Australia
December 2001

Example written by Kevin Conder.