osciln

Accesses table values at a user-defined frequency.

This opcode can also be written as oscilx.

Syntax

ares osciln kamp, ifrq, ifn, itimes

Initialization

ifrq, itimes -- rate and number of times through the stored table.

ifn -- function table number.

Performance

kamp -- amplitude factor

osciln will sample several times through the stored table at a rate of ifrq times per second, after which it will output zeros. Generates audio signals only, with output values scaled by kamp.

Examples

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

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

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

gione ftgen 1, 0, 1024, 7, 0, 1,   1, 1024, 0
gitwo ftgen 2, 0, 1024, 7, 0, 512, 1, 512,  0

instr 1 ;very simple waveguide system

ifn     = p4
ipitch  = p5
itimes  = p6
iperiod = 1000/ipitch

afeed   init   0
aimpl   osciln 1, ipitch, ifn, itimes   ;use as excitation signal
arefl   tone   aimpl + afeed, 4000
aout    atone  arefl, 5000
afeed   vdelay arefl, iperiod, 10
        outs   aout*3, aout*3

endin
</CsInstruments>
<CsScore>

i 1 0  4 1 110 1    ;use different tables,
i 1 5  4 2 110 1    ;& different pitch
i 1 10 4 1 110 10   ;& different number of times the table is read
i 1 15 4 2 110 10
i 1 20 6 1 880 1
i 1 25 3 2 880 1
i 1 30 3 1 880 10
i 1 35 3 2 880 10

e
</CsScore>
</CsoundSynthesizer>

See Also

Table Access