Description

Uses the OSC protocol to send message to other OSC listening processes.

Syntax

OSCsend kwhen, ihost, iport, idestination[, itype , xdata1, xdata2, ...]

Initialization

ihost -- a string that is the intended host computer domain name. An empty string is interpreted as the current computer.

iport -- the number of the port that is used for the communication.

idestination -- a string that is the destination address. This takes the form of a file name with directories. Csound just passes this string to the raw sending code and makes no interpretation.

itype -- a string that indicates the types of the optional arguments that are read at k-rate. The string can contain the characters "abcdfilmstAG" which stand for audio, Boolean, character, double, float, 32-bit integer, 64-bit integer, MIDI, string, timestamp, k-rate array and ftable. The OSC message may not have any types, in which case, it will consist only of the destination address.

Performance

kwhen -- a message is sent whenever this value changes. A message will always be sent on the first call.

The data is taken from the k-values or a-value that follow the format string. In a similar way to a printf format, the characters in order determine how the argument is interpreted. Note that a time stamp takes two arguments.

Example

The example shows a simple instrument, which when called, sends a group of 3 messages to a computer called "xenakis", on port 7770, to be read by a process that recognises /foo/bar as its address.

      instr   1
          OSCsend     1, "xenakis.cs.bath.ac.uk",7770, "/foo/bar", "sis", "FOO", 42, "bar"
      endin

Here is a complete example of the OSCsend opcode. It uses the file OSCsend.csd.

<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:
; 
; By Stefano Cucchi - 2021
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

giOSC1 OSCinit 8020

instr 3 ; OSC send

krandom randomh -50, 50, 4
iport = 8020
OSCsend krandom, "localhost", iport, "/boulevard", "f", krandom

endin

instr 4 ; OSC receive

kvaluefrom3 init 0
kdata1 OSClisten giOSC1, "/boulevard", "f", kvaluefrom3 
printk2 kvaluefrom3

endin 

</CsInstruments>
<CsScore>
i 3 0 5 
i 4 0 5
e
</CsScore>
</CsoundSynthesizer>

See also

OSC (Open Sound Control)

More information on this opcode: http://www.youtube.com/watch?v=JX1C3TqP_9Y , made by Andrés Cabrera

Credits

Data types a, A and G were added in 6.07; they send data via blobs and are only really useful to other Csound instances or custom listeners.