GEN07 — Constructs functions from segments of straight lines.
size -- number of points in the table. Must be a power of 2 or power-of-2 plus 1 (see f statement).
a, b, c, etc. -- ordinate values, in odd-numbered pfields p5, p7, p9, . . .
n1, n2, etc. -- length of segment (no. of storage locations), in even-numbered pfields. Cannot be negative, but a zero is meaningful for specifying discontinuous waveforms (e.g. in the example below). The sum n1 + n2 + .... will normally equal size for fully specified functions. If the sum is smaller, the function locations not included will be set to zero; if the sum is greater, only the first size locations will be stored.
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Here is a simple example of the GEN07 routine. It uses the file gen07.csd. It will create a single-cycle sawtooth whose discontinuity is mid-way in the stored function. Here is its diagram:
Example 556. A simple example of the GEN07 routine.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o gen07.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 kr = 4410 ksmps = 10 nchnls = 1 ; Instrument #1. instr 1 kamp = 30000 kcps = 440 ifn = 1 ; Play the sine wave stored in Table #1. a1 oscil kamp, kcps, ifn out a1 endin </CsInstruments> <CsScore> ; Table #1: a sawtooth wave (using GEN07). f 1 0 256 7 0 128 1 0 -1 128 0 ; Play Instrument #1 for 2 seconds. i 1 0 2 e </CsScore> </CsoundSynthesizer>