dumpk — Periodically writes an orchestra control-signal value to an external file.


Periodically writes an orchestra control-signal value to a named external file in a specific format.


dumpk  ksig, ifilname, iformat, iprd


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 i 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.


ksig -- a control-rate signal

This opcode allows a generated control signal value 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 dumpk opcodes in an instrument or orchestra but each must write to a different file.


Here is an example of the dumpk opcode. It uses the file dumpk.csd.

Example 123. Example of the dumpk opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

; 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 dumpk.wav -W ;;; for file output any platform

; Initialize the global variables.
sr = 44100
kr = 20
nchnls = 1

; By Andres Cabrera 2008

instr 1
; Write fibonacci numbers to file "fibonacci.txt"
; as ascii long integers (mode 7), using the orchestra's
; control rate (iprd = 0)

knumber init 0
koldnumber init 1
ktrans init 1
ktrans = knumber
knumber = knumber + koldnumber
koldnumber = ktrans
dumpk  knumber, "fibonacci.txt", 7, 0
printk2 knumber


;Write to the file for 1 second. Since control rate is 20, 20 values will be written
 i 1 0 1


See Also

dumpk2, dumpk3, dumpk4, readk, readk2, readk3, readk4


By: John ffitch and Barry Vercoe

1999 or earlier