<- C I ->

line, expon, linseg,expseg

     kr   line      ia, idur1, ib     ar   line      ia, idur1, ib
     kr   expon     ia, idur1, ib 
     ar   expon     ia, idur1, ib 
     kr   linseg    ia, idur1, ib[, idur2, ic[...]] 
     ar   linseg    ia, idur1, ib[, idur2, icI...]]
     kr   expseg    ia, idur1, ib[, idur2, ic[...]]
     ar   expseg    ia, idur1, ib[, idur2, ic[...]]
Output values kr or ar trace a straight line (exponential curve) or a series of line segments (exponential segments) between specified points.

INITIALIZATION

ia - starting value. Zero is illegal for exponentials.

ib, ic, etc. - value after dur1 seconds, etc. For exponentials, must be non-zero and must agree in sign with ia.

idur1 - duration in seconds of first segment. A zero or negative value will cause all initialization to be skipped.

idur2, idur3, etc. - duration in seconds of subsequent segments. A zero or negative value will terminate the initialization process with the preceding point, permitting the last-defined line or curve to be continued indefinitely in performance. The default is zero.

PERFORMANCE

These units generate control or audio signals whose values can pass through 2 or more specified points. The sum of dur values may or may not equal the instrument's performance time: a shorter performance will truncate the specified pattern, while a longer one.will cause the last-defined segment to continue on in the same direction.

Example:

     k2   expseg 440, p3/2,880, p3/2,440
This statement creates a control signal which moves exponentially from 440 to 880 and back, over the duration p3.

<- C I ->
Prepared from the MIT Media Lab Csound Manual, PJN, Nov 1994.