Open Sound Control (OSC) is a network protocol format for musical control data communication. A few of its advantages compared to MIDI are, that it's more accurate, quicker and much more flexible. With OSC you can easily send messages to other software independent if it's running on the same machine or over network. There is OSC support in software like PD, Max/MSP, Chuck or SuperCollider. A nice screencast of Andrés Cabrera shows communication between PD and Csound via OSC.1
OSC messages contain an IP adress with port information and the data-package, which will be send over network. In Csound, there are two opcodes, which provide access to network communication called OSCsend and OSClisten.
Example 08A01_osc.csd
<CsoundSynthesizer>
<CsOptions>
-o dac
</CsOptions>
<CsInstruments>
sr = 48000
ksmps = 32
nchnls = 2
0dbfs = 1
; localhost means communication on the same machine, otherwise you need
; an IP adress
#define IPADDRESS # "localhost" #
#define S_PORT # 47120 #
#define R_PORT # 47120 #
turnon 1000 ; starts instrument 1000 immediately
turnon 1001 ; starts instrument 1001 immediately
instr 1000 ; this instrument sends OSC-values
kValue1 randomh 0, 0.8, 4
kNum randomh 0, 8, 8
kMidiKey tab (int(kNum)), 2
kOctave randomh 0, 7, 4
kValue2 = cpsmidinn (kMidiKey*kOctave+33)
kValue3 randomh 0.4, 1, 4
Stext sprintf "%i", $S_PORT
OSCsend kValue1+kValue2, $IPADDRESS, $S_PORT, "/QuteCsound",
"fff", kValue1, kValue2, kValue3
endin
instr 1001 ; this instrument receives OSC-values
kValue1Received init 0.0
kValue2Received init 0.0
kValue3Received init 0.0
Stext sprintf "%i", $R_PORT
ihandle OSCinit $R_PORT
kAction OSClisten ihandle, "/QuteCsound", "fff",
kValue1Received, kValue2Received, kValue3Received
if (kAction == 1) then
printk2 kValue2Received
printk2 kValue1Received
endif
aSine poscil3 kValue1Received, kValue2Received, 1
; a bit reverbration
aInVerb = aSine*kValue3Received
aWetL, aWetR freeverb aInVerb, aInVerb, 0.4, 0.8
outs aWetL+aSine, aWetR+aSine
endin
</CsInstruments>
<CsScore>
f 1 0 1024 10 1
f 2 0 8 -2 0 2 4 7 9 11 0 2
e 3600
</CsScore>
</CsoundSynthesizer>
; example by Alex Hofmann (Mar. 2011)
There has been error in communication with Booktype server. Not sure right now where is the problem.
You should refresh this page.