oscil3

oscil3 --  A simple oscillator with cubic interpolation.

Description

Table ifn is incrementally sampled modulo the table length and the value obtained is multiplied by amp.

Syntax

ar oscil3 xamp, xcps, ifn [, iphs]

kr oscil3 kamp, kcps, ifn [, iphs]

Initialization

ifn -- function table number. Requires a wrap-around guard point.

iphs (optional) -- initial phase of sampling, expressed as a fraction of a cycle (0 to 1). A negative value will cause phase initialization to be skipped. The default value is 0.

Performance

kamp, xamp -- amplitude

kcps, xcps -- frequency in cycles per second.

oscil3 is experimental, and is identical to oscili, except that it uses cubic interpolation. (New in Csound version 3.50.)

Examples

Here is an example of the oscil3 opcode. It uses the files oscil3.orc and oscil3.sco.

Example 1. Example of the oscil3 opcode.

/* oscil3.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1

; Instrument #1 - a basic oscillator.
instr 1
  kamp = 10000
  kcps = 220
  ifn = 1

  a1 oscil kamp, kcps, ifn
  out a1
endin

; Instrument #2 - the basic oscillator with cubic interpolation.
instr 2
  kamp = 10000
  kcps = 220
  ifn = 1

  a1 oscil3 kamp, kcps, ifn
  out a1
endin
/* oscil3.orc */
        
/* oscil3.sco */
; Table #1, a sine wave table with a small amount of data.
f 1 0 32 10 0 1

; Play Instrument #1, the basic oscillator, for 
; two seconds. This should sound relatively rough.
i 1 0 2

; Play Instrument #2, the cubic interpolated oscillator, for
; two seconds. This should sound relatively smooth.
i 2 2 2
e
/* oscil3.sco */
        

See Also

oscil, oscili

Credits

Example written by Kevin Conder.