transegr

Constructs a user-definable envelope with extended release segment.

It is the same as transeg, with an extended release segment.

Syntax

ares transegr ia, idur, itype, ib [, idur2] [, itype] [, ic] ...
kres transegr ia, idur, itype, ib [, idur2] [, itype] [, ic] ...

Initialization

ia -- starting value.

ib, ic, etc. -- value after idur seconds.

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

idur2,... idurx etc. -- duration in seconds of segment

itype, itype2, etc. -- if 0, a straight line is produced. If non-zero, then transegr creates the following curve, for n steps:

ibeg + (ivalue - ibeg) * (1 - exp( i*itype/(n-1) )) / (1 - exp(itype))

Performance

If itype > 0, there is a slowly rising (concave) or slowly decaying (convex) curve, while if itype < 0, the curve is fast rising (convex) or fast decaying (concave). See also GEN16.

This opcode is the same as of transeg with an additional release segment triggered by a MIDI noteoff event, a negative p1 note event in the score or a turnoff2 opcode.

Examples

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

Example of the transegr opcode.
<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac  -+rtmidi=virtual -M0  ;;;realtime audio out and realtime midi in
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o transegr.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1

icps cpsmidi             
iamp ampmidi .2  
;             st,dur1,typ1,val,dur2,typ2,end                     
kenv transegr 0,  .2,  2,  .5,  1, - 3,   0
asig pluck kenv*iamp, icps, icps, 1, 1   
     outs asig, asig


endin
</CsInstruments>
<CsScore>
f1 0 4096 10 1  ;sine

f0 30   ;runs 30 seconds
e
</CsScore>
</CsoundSynthesizer>

Credits

Author: John ffitch
january 2010

New in Csound version 5.12