zarg

zarg
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Description

Reads from a location in za space at a-rate, adds some gain.

Syntax

ares zarg kndx, kgain

Initialization

kndx -- points to the za location to be read.

kgain -- multiplier for the a-rate signal.

Performance

zarg reads the array of floats at kndx in za space, which are ksmps number of a-rate floats to be processed in a k cycle. zarg also multiplies the a-rate signal by a k-rate value kgain.

Examples

Here is an example of the zarg opcode. It uses the file zarg.csd.

Example 1069. Example of the zarg opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
; Audio out   Audio in    No messages
-odac           -iadc     -d     ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o zarg.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1

; Initialize the ZAK space.
; Create 1 a-rate variable and 1 k-rate variable.
zakinit 1, 1

; Instrument #1 -- a simple waveform.
instr 1
  ; Generate a simple sine waveform, with an amplitude 
  ; between 0 and 1.
  asin oscil 1, 440, 1

  ; Send the sine waveform to za variable #1.
  zaw asin, 1
endin

; Instrument #2 -- generates audio output.
instr 2
  ; Read za variable #1, multiply its amplitude by 20,000.
  a1 zarg 1, 20000

  ; Generate audio output.
  out a1

  ; Clear the za variables, get them ready for 
  ; another pass.
  zacl 0, 1
endin


</CsInstruments>
<CsScore>

; Table #1, a sine wave.
f 1 0 16384 10 1

; Play Instrument #1 for one second.
i 1 0 1
; Play Instrument #2 for one second.
i 2 0 1
e


</CsScore>
</CsoundSynthesizer>

Credits

Author: Robin Whittle

Australia

May 1997

New in version 3.45

Example written by Kevin Conder.