>I try to pitchdown a loscil unit with a line opcode but it sweeps back
>pitching up !!
>I don't understand this because i clearly set the idur of the line to p3
>and not p3/2 or something...
>
>Please explain me this fellow Csounders...
>
>orc & sco are included below and the needed soundfile was 710kb, a little
>too much...so create
>a soundfile yourself of 363791 sampleframes at 16bit at 44100 Hz.
>
>
>David.
>
>*** ORC *********************
>*******************************
>sr = 44100
>kr = 441
>ksmps  = 100
>nchnls = 1
>
>;---------------------------------------------------------------------------
>-------
>; 
>; loscil test instrument.
>;
>;---------------------------------------------------------------------------
>-------
>
>instr 1
>
>
>khold oscil 50,0.3,2
>kvib randh 1,abs(khold)
>kdown line 1,p3,-5
This is the problem. line will output values that start at 1 and go to -5.
As soon as it goes below 0, it effectively starts up again. (A negative
frequency is the same as a positive one, but with an inversion of phase - in
other words, it sounds the same.) Your orchestra should work fine if you
replaced the line with:

kdown line 1, p3, .125  ;cause a 4 octave drop over p3 seconds.



----------------------------------
Russell F. Pinkston, D.M.A.
Associate Professor of Composition
Director, Electronic Music Studios
School of Music
The University of Texas at Austin
Austin, TX 78712

[512-471-0865]