Re: [sc-users] Problems with AtsFile / NRT / Score

[Joshua Parmenter <josh@xxxxxxxxxxxxxxxxx>]

Hi Sciss,

I have a busy morning, but can answer a couple quick things.
On Oct 23, 2007, at 9:16 AM, Sciss wrote:

> hello (josh),
>
> we are trying to synthesize a time-streched version of a soundfile  
> using AtsFile / AtsNoiSynth.
>
> we have a bunch of questions:
>
> - while AtsNoiSynth seems to work in realtime mode, the output in  
> NRT is just silence
>   (in the below example, if you exchange it for PinkNoise, the  
> output is there, so the setup is basically fine!)

More on this later, but to use ATS in NRT, it is actually better to  
save the ATS file as a soundfile, then do b_allocRead in the score.  
I'll do an example later today.

> - the sound quality is very bad. is this normal for Ats? Should we  
> go for other methods like classical phase vocoder?
>   do i have the wrong settings with atsa (we used the defaults)?

I have found that the defaults work mostly for short steady state  
sounds. Almost everything else needs some tweaking. I usually have a  
pattern when doing analyses... do the analysis, the do a real-time  
resynth and hear how it sounds. If there are problems, redo the  
analysis and tweak parameters. Do you have a sample soundfile  
somewhere on line? I can take a look at it and see if I can suggest a  
way about doing it.

> - is there a newer version of atsa than the one from 2004?

I think that is the one...

> - how is AtsFile -> addToScore supposed to work? we get a text file  
> that we can read with Score, but
>   Score is broken since it calls .sort after reading the file, and  
> that reverses the time order of the OSC bundles
>   (so in the example below, i just set the bundle list directly)

I can't remember! I'll take a look, but I think I have been going the  
route of saving the file as an aiff from SC, then doing the  
allocRead. I am in the middle of re-doing the AtsFile class to be  
smarter about all of this (and MUCH faster). But it isn't done yet...

> - am i having a strange hybrid intermediate build of SC, or why  
> does scsynth in NRT mode look for synthdefs in
>   /Applications/SuperCollider_f/synthdefs, while SynthDef ->  
> writeDefFile puts it into ~/Library/Application Support/ 
> SuperCollider/synthdefs
>   so it won't be found by scsynth?

This sounds like a bug introduced by the recent change of synthdef  
default locations... Dan... do you know if there is a way around this?

More later... let me know if you have a file I can hear.

Josh
> thanks a lot for help!
>
> ciao, -sciss-
>
>
> ///////////////////////////////////////////////
>
> a = AtsFile.new( "sounds/AlphavilleIlArrive.ats" );
> a.addToScore( "sounds/test.sco" );
>
> ///////////////////////////////////////////////
>
> x = Score.new;
> // THIS DOESN'T WORK BECAUSE .sort reverses the messages order!!
> //newFromFile( "sounds/test.sco" );
> x.score = thisProcess.interpreter.executeFile( "sounds/test.sco" );
>
> ( //play just the resynth, with LFSaw pointing into the file
> y = SynthDef( \atsTest, { arg scale = 1, noisePct = 0.1, bufnum = 0;
> //	Out.ar( 0, PinkNoise.ar( 0.25 ));
> 	Out.ar( 0, AtsNoiSynth.ar( bufnum, a.numPartials, 0, 1,
> 		filePointer: LFSaw.ar( a.sndDur.reciprocal * scale, pi, 0.5,  
> 0.5 ), noisePct: noisePct, mul: 1 ));
> });
> );
> y.writeDefFile;
>
> // ---> now copy ~/Library/Application Support/SuperCollider/ 
> synthdefs/atsTest.scsyndef
> // to /Applications/SuperCollider_f/synthdefs because scynth only  
> looks in the latter ?!
>
> // x.add([ 0.0, [ "/d_recv", y.asBytes, nil ]]);
> k = Synth.basicNew( \atsTest );
> //x.add([ 0.0, [ "/sync", 666 ]]);
> x.add([ 0.0, k.newMsg( nil, [ \scale, 0.9 ])]);
> x.add([ (a.sndDur / 0.9), k.freeMsg ]);
>
> o = ServerOptions.new;
> o.numOutputBusChannels = 1;
> x.recordNRT( "/tmp/test.osc", "sounds/testOut.aif", nil, 44100,  
> "AIFF", "int16", o );
>
> _______________________________________________
> sc-users mailing list
> sc-users@xxxxxxxxxxxxxxx
> http://www.create.ucsb.edu/mailman/listinfo/sc-users

******************************************
/* Joshua D. Parmenter
http://www.realizedsound.net/josh/

“Every composer – at all times and in all cases – gives his own  
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