GEN23
GEN23 — Reads numeric values from a text file.
Initialization
"filename.txt" -- numeric values contained in "filename.txt" (which indicates the complete pathname of the character file to be read), can be separated by spaces, tabs, newline characters or commas.
size -- number of points in the table. Must be a power of 2 , power of 2 + 1, or zero. If size = 0, table size is determined by the number of numeric values in filename.txt. (New in Csound version 3.57)
![[Note]](images/note.png)
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All characters following ';', '#' (comment) or '<' (XML tag from version 6.04) are ignored until next line (numbers too). |
Examples
Here is an example of the GEN23 generator. It uses the file gen23.csd and spectrum.txt.
Example 1287. Example of the GEN23 generator.
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 -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o gen23.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 ;"spectrum.txt" is created by the spectrum plotter of Audacity (set at size 128), using "fox.wav". instr 1 ;performs additive synthesis based on spectrum.txt indx =0 ;start reading at first value loop: ifreq tab_i indx, 2 ;take odd values of list (= frequency) iamp tab_i indx+1, 2 ;take even values of list (= amplitude) event_i "i", 10, 0, p3, iamp, ifreq ;use "event_i" to trigger instr. 10 loop_lt indx, 2, 126, loop ;use all 126 frequency and amplitude values endin instr 10 ;generate sound iamp = p4 ifreq = p5 asig poscil ampdb(iamp), ifreq, 1 asig linen asig, .01, p3, p2 outs asig, asig endin </CsInstruments> <CsScore> f 1 0 16384 10 1 ;sine wave f 2 0 128 -23 "spectrum.txt" ;"spectrum.txt" can be found in /manual/examples i1 0 2 e </CsScore> </CsoundSynthesizer>
This is the diagram of the waveform of the GEN23 routine, as used in the example:
f 2 0 128 -23 "spectrum.txt" - not normalized