Hi Lars,

Check out the following:


ftp://ftp.maths.bath.ac.uk/pub/
          dream/documentation/tutorials/
The beginning tutorials give good examples of how to use lineseg for
ADSR envelopes


See also 
http://www.esm.rochester.edu/onlinedocs/allan.cs/ 
Schindler Csound tutorial on line

www.sfu.ca/sca/Manuals/Csound/KellerTut/Home.html
another online tutorial

ftp://ftp.musique.umontreal.ca/pub/mirrors/accci
Amsterdam Csound Instrument catalog mirror

Good luck
Chris




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