oscil3 — A simple oscillator with cubic interpolation.
oscil3 reads table ifn sequentially and repeatedly at a frequency xcps. The amplitude is scaled by xamp. Cubic interpolation is applied for table look up from internal phase values.
ifn (optional) -- function table number. Requires a wrap-around guard point. Defaults to -1 indicating a sinewave.
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.
kamp, xamp -- amplitude
kcps, xcps -- frequency in cycles per second.
oscil3 is identical to oscili, except that it uses cubic interpolation.
Table ifn is incrementally sampled modulo the table length and the value obtained is multiplied by amp.
If you need to change the oscillator table with a k-rate signal, you can use oscilikt
Here is an example of the oscil3 opcode. Play oscil3.csd
Example 684. Example of the oscil3 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 -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o oscil3.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 kamp = .6 kcps = 440 ifn = p4 asig oscil kamp, kcps, ifn outs asig,asig endin instr 2 kamp = .6 kcps = 440 ifn = p4 asig oscil3 kamp, kcps, ifn outs asig,asig endin </CsInstruments> <CsScore> f1 0 128 10 1 ; Sine with a small amount of data f2 0 128 10 1 0.5 0.3 0.25 0.2 0.167 0.14 0.125 .111 ; Sawtooth with a small amount of data f3 0 128 10 1 0 0.3 0 0.2 0 0.14 0 .111 ; Square with a small amount of data f4 0 128 10 1 1 1 1 0.7 0.5 0.3 0.1 ; Pulse with a small amount of data i 1 0 2 1 i 2 3 2 1 i 1 6 2 2 i 2 9 2 2 i 1 12 2 3 i 2 15 2 3 i 1 18 2 4 i 2 21 2 4 e </CsScore> </CsoundSynthesizer>