cngoto

cngoto — Transfers control on every pass when a condition is not true.

Description

Transfers control on every pass when the condition is not true.

Syntax

cngoto condition, label

where label is in the same instrument block and is not an expression, and where R is one of the Relational operators (<, =, <=, ==, !=) (and = for convenience, see also under Conditional Values).

Examples

Here is an example of the cngoto opcode. It uses the files cngoto.orc and cngoto.sco.

Example 67. Example of the cngoto opcode.

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

; Instrument #1.
instr 1
  ; Change kval linearly from 0 to 2 over
  ; the period set by the third p-field.
  kval line 0, p3, 2

  ; If kval *is not* greater than or equal to 1 then play
  ; the high note. Otherwise, play the low note.
  cngoto (kval >= 1), highnote
    kgoto lownote

highnote:
  kfreq = 880
  goto playit

lownote:
  kfreq = 440
  goto playit

playit:
  ; Print the values of kval and kfreq.
  printks "kval = %f, kfreq = %f\\n", 1, kval, kfreq

  a1 oscil 10000, kfreq, 1
  out a1
endin
/* cngoto.orc */

        
/* cngoto.sco */
; Table: a simple sine wave.
f 1 0 32768 10 1

; Play Instrument #1 for two seconds.
i 1 0 2
e
/* cngoto.sco */

        

Its output should include lines like:

kval = 0.000000, kfreq = 880.000000
kval = 0.999732, kfreq = 880.000000
kval = 1.999639, kfreq = 440.000000
      

See Also

cggoto, cigoto, ckgoto, goto, if, igoto, tigoto, timout

Credits

Example written by Kevin Conder.

New in version 4.21