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Python interface to Supercollider scsynth
SC 0.3.1 ----> Control supercollider sound server from Python ixi software - Jan 2012 www.ixi-software.net | www.ixi-audio.net License : GNU GPL This application is free software; you can redistribute it and/or modify it under the terms of the GNU, General Public License as published by the Free Software Foundation. This aplication is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA scsynth / scosc libraries by Patrick Stinson are under GNU GPL . Description: SC allows to easily control Supercollider (http://en.wikipedia.org/wiki/SuperCollider) sound server (scsynth) from Python. It wraps scsynth / scosc libraries by Patrick Stinson (http://trac2.assembla.com/pkaudio). They allow Python to talk to scsynth via OpenSoundControl (http://en.wikipedia.org/wiki/Open_Sound_Control). SC provides with a simpler API to use those libraries. However advance users might want to bypass SC and use those libraries directly. Using SC, Supercollider Synthdefs can be loaded into the scsynth server therefore can be totally controlled from python. New synthdefs can be instantiated in real time and its sound conections can be changed. SC can also be used from interactive Python to do live coding (http://en.wikipedia.org/wiki/Live_coding). For an advanced real life example check Slicer this application uses Python+Opengl+WxPython to create a GUI that controls a scsynth sound engine process that runs in the background. http://ixi-audio.net/content/body_software_slicer.html Installing : SC, like any other python library, can be installed in your system Python folder or it can just live next to the files that import it. To install run from the terminal $ python setup.py install Usage : Check examples provided at SC folder. For a real life complex example check Slicer app at www.ixi-audio.net Supercollider language (sclang) allows to compile crossplatform .scsyndef files. This synthdefs describe a set of sound conection between Ugens or Unit Generators. They can be loaded into the scserver and controlled. SC allows to easily wrap around those synthdefs. For example a simple synthdef that sends a sine wave to the sound card would look like this in sclang : ( SynthDef(\sine, { |amp = 0.5, freq = 440| var data = SinOsc.ar(freq, 0, amp); Out.ar(0, data ! 2); }).store; ) Compiling this code would produce a file called sine.scsyndef (in the supercollider synthdefs folder) that can be later loaded into scsynth and controlled by SC, like this: sine = sc.Synth( "sine", args=["freq", 600, "amp", 0.5] ) sine.freq = 444 sine.amp = 0.9 ... and so on ... sc.Synth class provides a class that can dynamically adds new variables when needed, this way we dont need to subclass sc.Synth unless we need some kind of calculation with the variables. if we just set or get them we cn just do it directly. Ideally you are able to 'mirror' each of the synthdefs argument with a variable in the sc.Synth class like in the example above. Check the sine.py and sounds.py examples for more details. NOTE that stereo synthdefs use TWO chanels, so if you say out bus is number 2. it will take 2 and 3 to play the stereo. Be careful not to use chanels that are already taken by some other synthdef 0 and 1 are the default sound out chanel. So setting a synthdef out to 0 means directing its sound output to the sound card . Sound in from sound card should be 5 and 6. Make sure you use stereo samples with stereo synthdefs. Otherwise they might not work. In some systems (specially windows) you must point to the right location of the scsynth, this changes between systems (linux, OSX, windows). This is done when starting the module. On linux this is usually either /usr/bin or /user/local/bin, On Windows usually C:\Program Files\Psycollider and on Mac /Applications/Supercollider. Find where the file is in your system and point to it this way : sc.start( exedir='C:\Program Files\PsyCollider' ) API: there is an API description few lines below. Check sc/sc.py file code for in depth documentation of classes and functions. Synthdefs : There are few synthdefs included in the synthdefs folder ready for use. The source code is included as well. We hope they are a nice way to get into Supercollider programming. Requirements: scsynth. This sould be in your system if you have Supercollider installed. Usually you need to point to the directory where scsynth file is. Bugs / to do : Versions: 0.3.1 - removed -b option. updated to latest version of server.py. this solves problem with buffer ids 0.3 - added more scsynth startup options to process start - detach scsynth startup from library start 0.2 - few changes in API to allow for manual controls of scsynth - included scsynth and scosc libraries 0.1 - basic functionality created - comiled scsyndefs and source added To do: - quit scsynth process when quiting (if controlled from python) - make sure verbose is propagated all the way - use server.receive('/fail', '/loaded') when loading samples and synthdefs instead of just time.sleep() - API description --------------------------------- # Variables # sndpath directory where to look for files when loading sounds sc.sc.sndpath = 'C:\mysounds' synthdefpath directory where to look for files when loading synthdefs sc.sc.synthdefpath = '/home/myuser/Desktop/mysynthdefs' # Functions # def start( exedir='', port=57110, inputs=2, outputs=2, samplerate=44100, verbose=0, spew=0, startscsynth=1 ) : Starts the scsynth server process in the background with given arguments. exedir : directory where scsynth lives port : supercollider port. you dont need to change this usually inputs : number of sound inputs outputs : number of sound outputs samplerate : sample rate for server verbose : 1 or 0, it will print in the python console answers from sever. For debugging spew : 1 or 0, it will print in the python console messages sent from python to the server. For debugging startscsynth: 1 or 0, starts scsynth process or not sc.start(exedir='C:\Program Files\PsyCollider', samplerate=48000, spew=1) sc.start(exedir=os.getcwd(), spew=1, verbose=1) quit() quits scsynth process sc.quit() register( address, function ) binds an OSC address and a function. To manipulate messages from server. def printAll(self, msg) : print 'OSC msg received >> ', msg sc.register( '/b_info', printAll ) loadSnd( filename, wait ) -> buffnum loads sound file into servre from current sound folder and retuns integer buffnum ID filename : name of sound file wait : True/False. Wait for sound to load. Default is False sc.loadSnd( 'numeros.wav' ) loadSndAbs(path, wait) -> buffnum loads sound file into server from absolute path and retuns integer buffnum ID path : absolute path to sound file wait : True/False. Wait for sound to load. Default is False sc.loadSndAbs( '/home/myuser/sounds/numeros.wav' ) unloadSnd( buf_id ) Unloads a sound from the server memory buffnumID = sc.loadSnd( 'numeros.wav' ) sc.unloadSnd( buffnumID ) # Classes # Synth( stringdefname, nodeID, addAction, addTargetID ) -> synthdef instance Loads and instantiates the given synthdef . Returns the synthdef instance You candefine more properties for instances of this class by intialisating them directly. You dont need to extend the class for this. check sine.py example and sc.py for more documentation delay = sc.Synth( 'XiiDelay' ) delay.fxlevel = 1 delay.free() Group( groupID, addAction, addTargetID ) -> group instance Controls synths that are asigned to this group. Returns the group instance. check groups.py example and sc.py for more documentation sines = sc.Group() print sines.groupID synth1 = sc.Synth('sine',addTargetID=sines.groupID ) synth2 = sc.Synth('sine',addTargetID=sines.groupID ) synth1.freq = 333 synth2.freq = synth1.freq * 2.5 sines.amp = 1 # controls both at once ---------------------------------------- thanks to patrick stinson for making possible to control supercollider from python with scosc/scsynth libraries,
hello,
i have supercollider 3.6 and python 2.7 and i want to use sc to code supercollider from python.
In your tutorial you have said the the supercollider code should be compiled in the supercollider synthdefs folder. How should i do this?
Greetings
Hi, I'm having an issue freeing synths. When I run, for example, the groups.py script, everything runs fine until trying to free the synths. This has persisted among all my implementations.
From groups.py, this is the resulting output:
loading bufnum with ID 0
pan 0.00949658643344 amp 0.55447710064
pan 0.625167511009 amp 0.200161115288
pan 0.635937703659 amp 0.963568677795
pan 0.546788197736 amp 0.833285079886
pan -0.711556051208 amp 0.84069871534
Traceback (most recent call last):
File "groups.py", line 48, in <module>
for p in playerlist : p.free() ## free all
File "/Library/Python/2.7/site-packages/sc/sc.py", line 193, in free
if self.position :
AttributeError: 'Synth' object has no attribute 'position'
Thanks!
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