oscilikts

A linearly interpolated oscillator with sync status that allows changing the table number at k-rate.

oscilikts is the same as oscilikt. Except it has a sync input that can be used to re-initialize the oscillator to a k-rate phase value. It is slower than oscilikt and osciliktp.

Syntax

ares oscilikts xamp, xcps, kfn, async, kphs [, istor]

Initialization

istor (optional, defaults to 0) -- skip initialization.

Performance

xamp -- amplitude.

xcps -- frequency in Hz. Zero and negative values are allowed. However, the absolute value must be less than sr (and recommended to be less than sr/2).

kfn -- function table number. Can be varied at control rate (useful to morph waveforms, or select from a set of band-limited tables generated by GEN30).

async -- any positive value resets the phase of oscilikts to kphs. Zero or negative values have no effect.

kphs -- sets the phase, initially and when it is re-initialized with async.

Examples

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

<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 oscilikts.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

; Instrument #1: oscilikts example.
instr 1
  ; Frequency envelope.
  kfrq expon 400, p3, 1200
  ; Phase.
  kphs line 0.1, p3, 0.9

  ; Sync 1
  atmp1 phasor 100
  ; Sync 2
  atmp2 phasor 150
  async diff 1 - (atmp1 + atmp2)

  a1 oscilikts 14000, kfrq, 1, async, 0
  a2 oscilikts 14000, kfrq, 1, async, -kphs

  out a1 - a2
endin


</CsInstruments>
<CsScore>

; Table #1: Sawtooth wave
f 1 0 3 -2 1 0 -1

; Play Instrument #1 for four seconds.
i 1 0 4
e


</CsScore>
</CsoundSynthesizer>

See also

Basic Oscillators

Credits

Author: Istvan Varga

New in version 4.22