cossegb — Trace a series of line segments between specified absolute points with cosine interpolation.
Trace a series of line segments between specified absolute points with cosine interpolation.
ares cossegb ia, itim1, ib [, itim2] [, ic] [...]
kres cossegb ia, itim1, ib [, itim2] [, ic] [...]
ia -- starting value.
ib, ic, etc. -- value at tim1 seconds, etc.
itim1 -- time in seconds of end of first segment. A zero or negative value will cause all initialization to be skipped.
itim2, itim3, etc. -- time in seconds at the end of subsequent segments.
These units generate control or audio signals whose values can pass through 2 or more specified points. The last tim value 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 value to be repeated until the end of the note.
Here is an example of the cossegb opcode. It uses the file cossegb.csd.
Example 139. Example of the cossegb 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 linseg.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 giSine ftgen 0, 0, 2^10, 10, 1 instr 1 kcps = cpspch(p4) kenv cossegb 0, 0.25, 1, 1, 0 asig poscil kenv, kcps, giSine outs asig, asig endin instr 2 ; scaling to duration kcps = cpspch(p4) kenv cossegb 0, p3*0.25, 1, p3, 0 asig poscil kenv, kcps, giSine outs asig, asig endin </CsInstruments> <CsScore> i 1 0 1 7.00 ; = 1 sec, p3 fits exactly i 1 2 2 7.00 ; = 2 sec, p3 truncated at 1 sec i 2 4 1 7.00 ; scales to duration i 2 6 2 7.00 ; of p3 e </CsScore> </CsoundSynthesizer>