February 2020 - chuck-users - lists.cs.princeton.edu

PhD position in Sound and Music Computing, KTH, Stockholm, Sweden
by Andre Holzapfel 17 Feb '20

17 Feb '20

Doctoral student in Sound and Music Computing KTH Royal Institute of Technology Stockholm, Sweden Project description Third-cycle subject: Media Technology The project you will work in is funded by the Swedish agency Vetenskapsrådet, and is titled “Historically informed design of sound synthesis”. Based on a forgotten treasure, the Elektronmusikstudion (EMS) collection of historical analog synthesizers from the 60ies and 70ies, we aim to create a series of digital electronic music instruments enabling different expressions and instrumental forms. Your task will be to explore the collection, to implement digital emulations of some of the instruments, and to develop user interfaces for them. You will then collaborate with artists at the royal college of music (KMH) to use these instruments within new compositions, and conduct user tests with online communities.Your work will take place at the Division of Media Technology and Interaction design (MID), in the Sound and Music Computing (SMC) team. You will collaborate with the Royal College of Music and with the organization hosting the synthesizer collection (Musikverket). In addition, you will be able to apply for short term scientific missions to visit partners in the Nordic SMC network during your studies. Supervision: The doctoral student will be supervised by: Andre Holzapfel (main supervisor), Sandra Pauletto (co-supervisor, KTH), Henrik Frisk, (co-supervisor, KMH), Dan Lundberg (co-supervisor, Musikverket). Application info (Deadline 20 March 2020): https://www.kth.se/en/om/work-at-kth/lediga-jobb/what:job/jobID:315148/type… -- Kind regards Andre Holzapfel, Ph.D. (Computer Science) Ph.D. (Ethnomusicology) Assistant Professor KTH Royal Institute of Technology School of Electrical Engineering and Computer Science Media Technology and Interaction Design www.kth.se/profile/holzap

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LiSa Looper button MIDI
by Matthew.Noone 14 Feb '20

14 Feb '20

Hi all, I'm trying to use the LiSa looper function in ChucK using a MIDI pad. I've got a handle on using to loop once tapping a midi pad (like using a loop pedal) but I can't figure out how to 'overdub' on the same sample time? I am currently using a lisacontainer in my MID set up. Code is below. //MIDI //integer file tracker public class Master { // declare a static Envelope reference called 'out' static Envelope @ out; } // Master.out is how we now refer to our envelope. but we need to initialise it: new Envelope @=> Master.out; //declare env out Master.out => dac; //lisa setup time startTime; //for remembering when recording started Event lisaPush, lisaStopRec; //declare variables int filetracker[2][8]; 0 => int toggle36; int toggle[2][8]; for(0=>int x; x++; x<8) { 0 => toggle[0][x]; 0 => toggle[1][x]; } MidiIn midi; MidiMsg Midimsg; //MIDI port 0 => int midiport; //open port if ( !midi.open(midiport) ) { <<< "error: did not open port" >>>; me.exit(); } <<< " MIDI port open " >>>; spork ~ lisaContainer(); //loop while (true) { midi => now; while ( midi.recv(Midimsg) ) { <<< Midimsg.data1, Midimsg.data2, Midimsg.data3 >>>; //assign button numbers on and off and code if( Midimsg.data2 == 36 && Midimsg.data1 ==144 ) { MachAdd(1, 2, "Lisa Loop"); } if( Midimsg.data2 == 37 && Midimsg.data1 ==144 ) { lisaPush.broadcast(); } if( Midimsg.data2 == 37 && Midimsg.data1 ==128 ) { lisaStopRec.broadcast(); } if( Midimsg.data2 == 38 && Midimsg.data1 ==144 ) { MachAdd(0, 2, "Lisa Continuous loop2"); } if( Midimsg.data2 == 39 && Midimsg.data1 ==144 ) { MachAdd(0, 3, "Lisa Loop2"); } if( Midimsg.data2 == 40 && Midimsg.data1 ==144 ) { MachAdd(0, 5,"Lisa Continuous loop2"); } if( Midimsg.data2 == 41 && Midimsg.data1 ==144 ) { MachAdd(1, 3, "Lisa1"); } if( Midimsg.data2 == 42 && Midimsg.data1 ==144 ) { MachAdd(0, 0, "gverb"); } if( Midimsg.data2 == 43 && Midimsg.data1 ==144 ) { MachAdd(0, 1, "Lisa2"); } if( Midimsg.data2 == 44 && Midimsg.data1 == 144 ) { MachAdd(1,0,"expdelay"); } if( Midimsg.data2 == 45 && Midimsg.data1 ==144 ) { MachAdd(1, 0, "spectacle"); } if( Midimsg.data2 == 46 && Midimsg.data1 ==144 ) { MachAdd(1, 1, "PRINCETON/Lisa Delay"); } if( Midimsg.data2 == 47 && Midimsg.data1 ==144 ) { MachAdd(1, 4, "PRINCETON/Lisa Granualize"); } if( Midimsg.data2 == 48 && Midimsg.data1 ==144 ) { MachAdd(1, 6,"PRINCETON/low loop short ramp"); } if( Midimsg.data2 == 49 && Midimsg.data1 ==144 ) { MachAdd(0, 6,"PRINCETON/Low Loop drone stuff"); } if (Midimsg.data2 == 51 &&Midimsg.data1 ==144) { // fade up the MasterOut envelope: Master.out.keyOn(); 10::second => Master.out.duration; } if (Midimsg.data2 == 50 &&Midimsg.data1 ==144) { // fade up the MasterOut envelope: Master.out.keyOff(); } } } fun void MachAdd(int a, int b, string theFile) { if(toggle[a][b] == 0) { <<< "Open", theFile >>>; Machine.add( me.dir()+theFile ) => filetracker[a][b]; 1 => toggle[a][b]; } else if (toggle[a][b] == 1) { Machine.remove(filetracker[a][b]); 0 =>toggle[a][b]; } } fun void lisaContainer () { while(true) { lisaPush => now; // wait for LiSa's MIDI button to be pushed spork ~ lisaLooper(); // spork the looper lisaPush => now; // wait for Lisa's stop button to be pushed } } fun void lisaLooper() { // declare LiSa locally here rather than globally so that when "me.exit();" occurs at the end of this function, this LiSa instance is totally forgotten by the machine adc => LiSa looper =>Dyno safe => Gain g => dac; //simple patch 1.2 => g.gain; 20::second => looper.duration; //allocate memory <<< "LiSa recording", "" >>>; 0::ms => looper.recPos; 1 => looper.record; now => startTime; //remember when recording started lisaStopRec => now; // wait for LiSa's button to be pushed to stop the recording <<< "LiSa stopping recording, starting to play loop", "" >>>; 0 => looper.record; 0::ms => looper.playPos; 1 => looper.play; now - startTime => looper.loopEnd; //calculate looplength lisaPush => now; // wait for LiSa's stop button to be pushed, then exit this function, wiping the slate clean <<< "Stopping LiSa playing, exiting this instance of LiSa","">>>; me.exit(); } Dr. Matthew James Noone Sarode Artist & Irish Research Council Postdoctoral Fellow Irish World Academy of Music and Dance University of Limerick

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Record to disk inside midiaudicle
by herman verbaeten 13 Feb '20

13 Feb '20

Hi, Everywhere i look, tutorials instruct me to use the record to disk method from the command line outside miniaudicle. Is it also possible to run it within miniaudicle inside the chuck program you want to record? Thanks for your answer. Kind regards, Herman Verstuurd vanaf mijn iPad

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Re: [chuck-users] playing SndBuf backward
by Perry Cook 13 Feb '20

13 Feb '20

It is playing backward from 0, to 0, so it does nothing. You have to set .pos to .samples() (point to the end, so it can play backward). In the example, you’d need to advance time to let it play forward: mySndBuf.samples() :: samp => now; // you’d hear it play forward then set rate to -1, then advance time again to hear it backward. PRC Looking at our book, I see that you didn’t copy all the lines. You’ve got to advance time to hear anything in ChucK. // 4.3 Playing sounds in reverse // by ChucK Programmer 4102, yluJ #A SndBuf mySound => dac; me.dir()+"/audio/hihat_04.wav" => mySound.read; #1 mySound.samples() => int numSamples; #2 // play sound once forward 0 => mySound.pos; numSamples :: samp => now; #3 // and once backward numSamples => mySound.pos; #4 -1.0 => mySound.rate; #5 numSamples :: samp => now; > On Feb 12, 2020, at 1:30 PM, chuck-users-request(a)lists.cs.princeton.edu wrote: > > Send chuck-users mailing list submissions to > chuck-users(a)lists.cs.princeton.edu > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > or, via email, send a message with subject or body 'help' to > chuck-users-request(a)lists.cs.princeton.edu > > You can reach the person managing the list at > chuck-users-owner(a)lists.cs.princeton.edu > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of chuck-users digest..." > > > Today's Topics: > > 1. Re: playing SndBuf backward (Perry Cook) > 2. Error in book "Programming for Musicians and digital artists > by Ge Wang" ? (herman verbaeten) > 3. playing SndBuf backward (herman verbaeten) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 12 Feb 2020 12:58:36 -0800 > From: Perry Cook <prc(a)cs.princeton.edu> > To: chuck-users(a)lists.cs.princeton.edu > Subject: Re: [chuck-users] playing SndBuf backward > Message-ID: <6DBAE4AC-7E7E-413D-8059-8CB929B9AC78(a)cs.princeton.edu> > Content-Type: text/plain; charset=utf-8 > > You can set the .pos to wherever you like, and set the .rate to a negative number. The sample will happily play backward to zero and stick there (unless you have .loop set). > > PRC > > Sent from my iPad > >> On Feb 12, 2020, at 9:00 AM, chuck-users-request(a)lists.cs.princeton.edu wrote: >> >> ?Send chuck-users mailing list submissions to >> chuck-users(a)lists.cs.princeton.edu >> >> To subscribe or unsubscribe via the World Wide Web, visit >> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users >> or, via email, send a message with subject or body 'help' to >> chuck-users-request(a)lists.cs.princeton.edu >> >> You can reach the person managing the list at >> chuck-users-owner(a)lists.cs.princeton.edu >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of chuck-users digest..." >> >> >> Today's Topics: >> >> 1. Re: => now (herman verbaeten) >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Tue, 11 Feb 2020 18:11:09 +0000 >> From: herman verbaeten <hverb54(a)hotmail.com> >> To: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu> >> Subject: Re: [chuck-users] => now >> Message-ID: >> <AM0PR08MB389035F6190B1D2C897C097BA5180(a)AM0PR08MB3890.eurprd08.prod.outlook.com> >> >> Content-Type: text/plain; charset="iso-8859-1" >> >> Thanks again Mario, >> >> I have another question: >> Can you recommend a procedure to address individual samples of a wave-file you read into the SndBuf. >> I discovered a way to play a part of a wave file starting at a certain point using ".pos". >> I also wonder if there's a way to play it backwards (reverse). >> >> Cheers, >> >> herman >> >> >> >> _______________________________ > > > > > ------------------------------ > > Message: 2 > Date: Wed, 12 Feb 2020 21:15:51 +0000 > From: herman verbaeten <hverb54(a)hotmail.com> > To: chuck mailing list <chuck-users(a)lists.cs.princeton.edu> > Subject: [chuck-users] Error in book "Programming for Musicians and > digital artists by Ge Wang" ? > Message-ID: > <AM0PR08MB38900B846EE7C57D44869411A51B0(a)AM0PR08MB3890.eurprd08.prod.outlook.com> > > Content-Type: text/plain; charset="iso-8859-1" > > Hi, > > I was looking in your book and copied listing 4.3 " Playing a sound file backward" > But it didn't work. Hopefully i did everything correctly. It did perform the first (forward) part but during the reverse part i heard nothing. Can you please help me.... > > Kind regards, > > Herman > > > // copy Listing 4.3 Playing a sound file backward > // from Programming for Musicians and digital artists by Ge Wang > > me.sourceDir() + "sample.wav" => string filename; > if( me.args() ) me.arg(0) => filename; > > // the patch > SndBuf mySound => dac; > > // load the file in buf > filename => mySound.read; > > mySound.samples() => int numSamples; > > 0 => mySound.pos; // this was ok > numSamples::samp => now; > > numSamples => mySound.pos; // This was not heard. Athough the program stayed in VM. > -1.0 => mySound.rate; > numSamples::samp => now; >

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Re: [chuck-users] playing SndBuf backward
by David Loberg Code 12 Feb '20

12 Feb '20

In my experience, in SndBuf, to play the file backwards from the end requires file.samples() - 1 => file.pos; file.rate(-1.); If the size of the file is, for example, 1000 samples, the first sample is located at 0 and the last sample bit is 999 (not 1000). On my machine, at least, if I set the position beyond the end of the file, it won't play backward. However, when using LiSa, the starting position is 1::samp, and the ending point is 1000::samp davd David Loberg Code School of Music Western Michigan University Sorry PRC it doesn't work: When i set "buf.rate" to 1.0 and "buf.pos" to 0, it does but not the other way around.... me.sourceDir() + "aeiou.wav" => string filename; if( me.args() ) me.arg(0) => filename; SndBuf buf => dac; filename => buf.read; buf.length() => dur totalelengte; buf.samples() => int samples; samples => buf.pos; -1.0 => buf.rate; samples::ms => now; ________________________________ Van: chuck-users-bounces(a)lists.cs.princeton.edu<mailto:chuck-users-bounces@lists.cs.princeton.edu> <chuck-users-bounces(a)lists.cs.princeton.edu<mailto:chuck-users-bounces@lists.cs.princeton.edu>> namens Perry Cook <prc(a)cs.princeton.edu<mailto:prc@cs.princeton.edu>> Verzonden: woensdag 12 februari 2020 20:58<x-apple-data-detectors://3> Aan: chuck-users(a)lists.cs.princeton.edu<mailto:chuck-users@lists.cs.princeton.edu><chuck-users(a)lists.cs.princeton.edu<mailto:chuck-users@lists.cs.princeton.edu>> Onderwerp: Re: [chuck-users] playing SndBuf backward You can set the .pos to wherever you like, and set the .rate to a negative number. The sample will happily play backward to zero and stick there (unless you have .loop set). PRC Sent from my iPad > On Feb 12, 2020, at 9:00 AM, chuck-users-request(a)lists.cs.princeton.edu<mailto:chuck-users-request@lists.cs.princeton.edu> wrote: > > Send chuck-users mailing list submissions to > chuck-users(a)lists.cs.princeton.edu<mailto:chuck-users@lists.cs.princeton.edu> > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > or, via email, send a message with subject or body 'help' to > chuck-users-request(a)lists.cs.princeton.edu<mailto:chuck-users-request@lists.cs.princeton.edu> > > You can reach the person managing the list at > chuck-users-owner(a)lists.cs.princeton.edu<mailto:chuck-users-owner@lists.cs.princeton.edu> > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of chuck-users digest..." > > > Today's Topics: > > 1. Re: => now (herman verbaeten) > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 11 Feb 2020 18:11:09 +0000 > From: herman verbaeten <hverb54(a)hotmail.com<mailto:hverb54@hotmail.com>> > To: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu<mailto:chuck-users@lists.cs.princeton.edu>> > Subject: Re: [chuck-users] => now > Message-ID: > <AM0PR08MB389035F6190B1D2C897C097BA5180(a)AM0PR08MB3890.eurprd08.prod.outlook.com<mailto:AM0PR08MB389035F6190B1D2C897C097BA5180@AM0PR08MB3890.eurprd08.prod.outlook.com>> > > Content-Type: text/plain; charset="iso-8859-1" > > Thanks again Mario, > > I have another question: > Can you recommend a procedure to address individual samples of a wave-file you read into the SndBuf. > I discovered a way to play a part of a wave file starting at a certain point using ".pos". > I also wonder if there's a way to play it backwards (reverse). > > Cheers, > > herman >

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Re: [chuck-users] playing SndBuf backward
by Perry Cook 12 Feb '20

12 Feb '20

You can set the .pos to wherever you like, and set the .rate to a negative number. The sample will happily play backward to zero and stick there (unless you have .loop set). PRC Sent from my iPad > On Feb 12, 2020, at 9:00 AM, chuck-users-request(a)lists.cs.princeton.edu wrote: > > Send chuck-users mailing list submissions to > chuck-users(a)lists.cs.princeton.edu > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > or, via email, send a message with subject or body 'help' to > chuck-users-request(a)lists.cs.princeton.edu > > You can reach the person managing the list at > chuck-users-owner(a)lists.cs.princeton.edu > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of chuck-users digest..." > > > Today's Topics: > > 1. Re: => now (herman verbaeten) > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 11 Feb 2020 18:11:09 +0000 > From: herman verbaeten <hverb54(a)hotmail.com> > To: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu> > Subject: Re: [chuck-users] => now > Message-ID: > <AM0PR08MB389035F6190B1D2C897C097BA5180(a)AM0PR08MB3890.eurprd08.prod.outlook.com> > > Content-Type: text/plain; charset="iso-8859-1" > > Thanks again Mario, > > I have another question: > Can you recommend a procedure to address individual samples of a wave-file you read into the SndBuf. > I discovered a way to play a part of a wave file starting at a certain point using ".pos". > I also wonder if there's a way to play it backwards (reverse). > > Cheers, > > herman > > > > _______________________________

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Error in book "Programming for Musicians and digital artists by Ge Wang" ?
by herman verbaeten 12 Feb '20

12 Feb '20

Hi, I was looking in your book and copied listing 4.3 " Playing a sound file backward" But it didn't work. Hopefully i did everything correctly. It did perform the first (forward) part but during the reverse part i heard nothing. Can you please help me.... Kind regards, Herman // copy Listing 4.3 Playing a sound file backward // from Programming for Musicians and digital artists by Ge Wang me.sourceDir() + "sample.wav" => string filename; if( me.args() ) me.arg(0) => filename; // the patch SndBuf mySound => dac; // load the file in buf filename => mySound.read; mySound.samples() => int numSamples; 0 => mySound.pos; // this was ok numSamples::samp => now; numSamples => mySound.pos; // This was not heard. Athough the program stayed in VM. -1.0 => mySound.rate; numSamples::samp => now;

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=> now
by herman verbaeten 11 Feb '20

11 Feb '20

Hi, I'm trying to understand what's really happening in chuck. I thought i did untill i saw some exemples of midi. Normaly you can only feed time or duration into now ( e.g. 10::ms => now) But in case you are awaiting a midi-in message you write : MidiIn min; while (true) { min => now } So in fact do you assign the message to time? Total confusion! Thanks for your answer. Herman

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Create a pause of e.g. 2 seconds between notes or samples to be played
by herman verbaeten 08 Feb '20

08 Feb '20

Hi, I've only recentely started studiing ChucK and i'm looking for an easy way to integrate a pause between notes to be played in a "while()" loop. Could someone tell me in what direction to look for a solution? thanks in advance! Herman

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ADSR and gradually shift pan from left to right and back
by herman verbaeten 06 Feb '20

06 Feb '20

Hello , Thanks a lot for your help. I still have some general questions and some about the program that follows: 1. Where can i find a chuck editor with the possibility to find words and replace them (all) and that also gives the colors for reserved words etc. 2. Is there a way to debug line per line to discover logical errors? 3. i discovered by accident that sometimes i can use "p.puf" but on other occasions i have to write "p.buf()" why is this? 4. in the program hereby, is there a way to have the pan do it's job independantely from the note-envelope-flow? to go faster or slower? 5. When i run this program it does what i want but i can't figure out why it says 2 times "p.pan = 1.000000" and 2 times "p.pan= -1.000000" (see below) Thanks !! Herman ---------------------------------------------------- program ------------------------------------------------------------------ // sound file me.sourceDir() + "wavefile.wav" => string filename; if( me.args() ) me.arg(0) => filename; <<<me.sourceDir()>>>; // the patch SndBuf buf => ADSR e => Pan2 p => dac; // set attack time, decay time, release time and pause time dur attack; dur decay ; dur release; dur pauze; 12::ms => attack ; 90::ms => decay ; 100::ms => release ; 5::ms => pauze ; // load file in buf filename => buf.read; // set gain .5 => buf.gain; // set a, d, s and r e.set( attack, decay, 0.001, release ); // switch is needed to stay in the "else" step untill p.pan = -1 0 => int switch; // begin pan extreme left -1 => p.pan; // time loop while( true ) { Math.random2(0,900000) => buf.pos; Math.random2f(1.0,1.2) => buf.rate; if( p.pan() < 1.0 && switch == 0) { p.pan() + .10 => p.pan; <<<"if p.pan = ",p.pan()>>>; } else { p.pan() - .10 => p.pan; <<<"else p.pan = ", p.pan()>>>; 1 => switch; if (p.pan() == -1) { 0 => switch; } } // key on - start attack e.keyOn(); attack + decay => dur ontime; ontime => now; // key off - start release e.keyOff(); // advance time by releasetime + pausetime release + pauze => now; } ---------------------------------------------------------console result print---------------------------------------------------- if p.pan = -0.900000 if p.pan = -0.800000 if p.pan = -0.700000 if p.pan = -0.600000 if p.pan = -0.500000 if p.pan = -0.400000 if p.pan = -0.300000 if p.pan = -0.200000 if p.pan = -0.100000 if p.pan = -0.000000 if p.pan = 0.100000 if p.pan = 0.200000 if p.pan = 0.300000 if p.pan = 0.400000 if p.pan = 0.500000 if p.pan = 0.600000 if p.pan = 0.700000 if p.pan = 0.800000 if p.pan = 0.900000 if p.pan = 1.000000 if p.pan = 1.000000 else p.pan = 0.900000 else p.pan = 0.800000 else p.pan = 0.700000 else p.pan = 0.600000 else p.pan = 0.500000 else p.pan = 0.400000 else p.pan = 0.300000 else p.pan = 0.200000 else p.pan = 0.100000 else p.pan = 0.000000 else p.pan = -0.100000 else p.pan = -0.200000 else p.pan = -0.300000 else p.pan = -0.400000 else p.pan = -0.500000 else p.pan = -0.600000 else p.pan = -0.700000 else p.pan = -0.800000 else p.pan = -0.900000 else p.pan = -1.000000 else p.pan = -1.000000 if p.pan = -0.900000 if p.pan = -0.800000 if p.pan = -0.700000 if p.pan = -0.600000 if p.pan = -0.500000 if p.pan = -0.400000

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