lphasor — Generates a table index for sample playback
ilps -- loop start.
ilpe -- loop end (must be greater than ilps to enable looping). The default value of ilps and ilpe is zero.
imode (optional: default = 0) -- loop mode. Allowed values are:
0: no loop
1: forward loop
2: backward loop
3: forward-backward loop
istrt (optional: default = 0) -- The initial output value (phase). It must be less than ilpe if looping is enabled, but is allowed to be greater than ilps (i.e. you can start playback in the middle of the loop).
istor (optional: default = 0) -- skip initialization if set to any non-zero value.
ares -- a raw table index in samples (same unit for loop points). Can be used as index with the table opcodes.
xtrns -- transpose factor, expressed as a playback ratio. ares is incremented by this value, and wraps around loop points. For example, 1.5 means a fifth above, 0.75 means fourth below. It is not allowed to be negative.
Here is an example of the lphasor opcode. It uses the file lphasor.csd.
Example 243. Example of the lphasor 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 -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o lphashor.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Example by Jonathan Murphy Dec 2006 sr = 44100 ksmps = 10 nchnls = 1 instr 1 ifn = 1 ; table number ilen = nsamp(ifn) ; return actual number of samples in table itrns = 1 ; no transposition ilps = 0 ; loop starts at index 0 ilpe = ilen ; ends at value returned by nsamp above imode = 3 ; loop forwards & backwards istrt = 10000 ; commence playback at index 10000 samples ; lphasor provides index into f1 alphs lphasor itrns, ilps, ilpe, imode, istrt atab tablei alphs, ifn ; amplify signal atab = atab * 10000 out atab endin </CsInstruments> <CsScore> f 1 0 262144 1 "beats.wav" 0 4 1 i1 0 60 e </CsScore> </CsoundSynthesizer>