line
Trace a straight line between specified points.
Syntax
Initialization
ia -- starting value.
ib -- value after idur seconds.
idur -- duration in seconds of segment. A zero or negative value will cause all initialization to be skipped.
line generates control or audio signals whose values move linearly from an initial value to a final one.
Note
A common error with this opcode is to assume that the value of ib is held after the time idur1. line does not automatically end or stop at the end of the duration given. If your note length is longer than idur seconds, kres (or ares) will not come to rest at ib, but will instead continue to rise or fall with the same rate. If a rise (or fall) and then hold is required that the linseg opcode should be considered instead.
Examples
Here is an example of the line opcode. It uses the file line.csd.
| Example of the line opcode. |
|---|
| <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 line.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
nchnls = 2
0dbfs = 1
instr 1
kp = p6
;choose between expon or line
if (kp == 0) then
kpitch expon p4, p3, p5
elseif (kp == 1) then
kpitch line p4, p3, p5
endif
asig vco2 .6, kpitch
outs asig, asig
endin
</CsInstruments>
<CsScore>
i 1 0 2 300 600 0 ;if p6=0 then expon is used
i 1 3 2 300 600 1 ;if p6=1 then line is used
i 1 6 2 600 1200 0
i 1 9 2 600 1200 1
i 1 12 2 1200 2400 0
i 1 15 2 1200 2400 1
i 1 18 2 2400 30 0
i 1 21 2 2400 30 1
e
</CsScore>
</CsoundSynthesizer>
|
See also
Linear and Exponential Generators