dumpk2 — Periodically writes two orchestra control-signal values to an external file.
Periodically writes two orchestra control-signal values to a named external file in a specific format.
ifilname -- character string (in double quotes, spaces permitted) denoting the external file name. May either be a full path name with target directory specified or a simple filename to be created within the current directory
iformat -- specifies the output data format:
1 = 8-bit signed char(high order 8 bits of a 16-bit integer
4 = 16-bit short integers
5 = 32-bit long integers
6 = 32-bit floats
7 = ASCII long integers
8 = ASCII floats (2 decimal places)
Note that A-law and U-law output are not available, and that all formats except the last two are binary. The output file contains no header information.
iprd -- the period of ksig output in seconds, rounded to the nearest orchestra control period. A value of 0 implies one control period (the enforced minimum), which will create an output file sampled at the orchestra control rate.
ksig1, ksig2 -- control-rate signals.
This opcode allows two generated control signal values to be saved in a named external file. The file contains no self-defining header information. But it contains a regularly sampled time series, suitable for later input or analysis. There may be any number of dumpk2 opcodes in an instrument or orchestra but each must write to a different file.
Here is an example of the dumpk2 opcode. Play dumpk2.csd Note that the example must be run from a directory for which the user has write access.
Example 255. Example of the dumpk2 opcode.
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 dumpk2.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 giSine ftgen 0, 0, 2^10, 10, 1 instr 1 ;writes two control signals to a file kfreq randh 100, 1, 2, 1, 500 ;generates one random number between 400 and 600 per second kdb randh 12, 1, 2, 1, -12 ;amplitudes in dB between -24 and 0 dumpk2 kfreq, kdb, "dumpk2.txt", 8, 1 ;writes the control signals prints "WRITING:\n" printks "kfreq = %f, kdb = %f\n", 1, kfreq, kdb ;prints them endin instr 2 ;reads the file written by instr 1 kf,kdb readk2 "dumpk2.txt", 8, 1 prints "READING:\n" printks "kfreq = %f, kdb = %f\n", 1, kf, kdb ;prints again kdb lineto kdb, .1 ;smoothing amp transition aout poscil ampdb(kdb), kf, giSine outs aout, aout endin </CsInstruments> <CsScore> i 1 0 5 i 2 5 5 e </CsScore> </CsoundSynthesizer>
The output should include lines like these:
kfreq = 429.202551, kdb = -20.495694
kfreq = 429.202551, kdb = -20.495694
kfreq = 407.275258, kdb = -23.123776
kfreq = 475.264472, kdb = -9.300846
kfreq = 569.979181, kdb = -7.315527
kfreq = 440.103457, kdb = -0.058331
kfreq = 429.202600, kdb = -20.495700
kfreq = 429.202600, kdb = -20.495700
kfreq = 407.275300, kdb = -23.123800
kfreq = 475.264500, kdb = -9.300800
kfreq = 569.979200, kdb = -7.315500
kfreq = 440.103500, kdb = -0.058300