GEN11 — Generates an additive set of cosine partials.
This subroutine generates an additive set of cosine partials, in the manner of Csound generators buzz and gbuzz.
size  number of points in the table. Must be a power of 2 or powerof2 plus 1 (see f statement).
nh  number of harmonics requested. Must be positive.
lh(optional)  lowest harmonic partial present. Can be positive, zero or negative. The set of partials can begin at any partial number and proceeds upwards; if lh is negative, all partials below zero will reflect in zero to produce positive partials without phase change (since cosine is an even function), and will add constructively to any positive partials in the set. The default value is 1
r(optional)  multiplier in an amplitude coefficient series. This is a power series: if the lhth partial has a strength coefficient of A the (lh + n)th partial will have a coefficient of A * r^{n}, i.e. strength values trace an exponential curve. r may be positive, zero or negative, and is not restricted to integers. The default value is 1.
Note  


Here is an example of the GEN11 routine. It uses the files gen11.csd.
Example 1239. An example of the GEN11 routine.
<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 Nonrealtime ouput leave only the line below: ; o gen11.wav W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ifn = p4 asig oscil .8, 220, ifn outs asig,asig endin </CsInstruments> <CsScore> f 1 0 16384 11 1 1 ;number of harmonics = 1 f 2 0 16384 11 10 1 .7 ;number of harmonics = 10 f 3 0 16384 11 10 5 2 ;number of harmonics = 10, 5th harmonic is amplified 2 times i 1 0 2 1 i 1 + 2 2 i 1 + 2 3 e </CsScore> </CsoundSynthesizer>
These are the diagrams of the waveforms of the GEN11 routines, as used in the example: