Hi,

Could someone explain me how delayr, delayw, deltap, deltapi work. 
Since I cannot find any books about it, I even do not know how to draw
a flow chart when I read some instrument design using algorithm
mentioned above.  For example, the instrument below(It is downloaded
from
_ftp.maths.bath.ac.uk/pub/dream/documentation/orchestras+scores/instruments/pinkston.1/delay.orc_):

        sr      =       44100
        kr      =       4410
        ksmps   =       10
        nchnls  =       1
;==========================================================================;
;               Example Delay Line Instrument                         
    ;
;                                                                     
    ;
;       p4 = ampfac     p5 = soundin#   p6 = maxdel     p7 = basedel  
    ;
;       p8 = pkvardel   p9 = vardelhz  p10 = vardelfn  p11 = feedfac  
    ;
;==========================================================================;

                instr   1

        iampfac =       (p4 == 0 ? 1 : p4)
        imaxdel =       p6
        ibase   =       p7
        ivary   =       p8
        ivarhz  =       p9
        ivarfn  =       p10
        ifeed   =       p11
        isrcfac =       (p12 == 0 ? 1 : p12)
        idelfac =       (p13 == 0 ? 1 : p13)

        avarsig init    0
	avardel oscili  ivary,ivarhz,ivarfn
	avardel =       ibase+avardel
        asource soundin p5
        ainsig  =       asource+avarsig*ifeed
	adelsig delayr  imaxdel
	avarsig deltapi avardel
		delayw  ainsig
	aoutsig =       asource*isrcfac+avarsig*idelfac
		out     aoutsig*iampfac
		endin

Thanks & Regards
==
Qian Chen

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