June 2011 - chuck-users - lists.cs.princeton.edu

Setting LPF Q or Freq to very high or low values causes bad sounds...
by Johnathan Bell 10 Jun '11

10 Jun '11

I'm not sure if I'm just doing something wrong or what, but (for instance) if I set up a SawOsc => LPF => DAC and set the LPF's Q to something very low (< 0.05) with the Osc set to a frequency of 440Hz, there is some kind of blow-your-ears-out high gain garbage that comes out of the speakers... Does anyone know if (1) this is normal and (2) what are normal (sane) values for this? I get the same kind of behavior if I set the cutoff frequency to something > 12000ish. - JB

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Re: [chuck-users] Modulation of parameters "by hand"? [Yo, scott!]
by Kassen 09 Jun '11

09 Jun '11

http://cip.ablelemon.co.uk This is really nice stuff! I like Scott's usage of blackhole for making signals persistent and continuous. The usage of GUI faders to avoid clicks and for expression is really cool too. For those of us not on OSX (or not inclined to sliders); when using buses as a sort of in-out matrix like Scott does when he writes; Provides basic connectivity to busses. function void connect(int, int) we could have "connect()" place a Envelope between the two busses and have that ramp up when connecting, then down when destroying the connection. That too would avoid clicks and could create a sort of cross-fading with some extra effort. Kas.

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interesting concert (The Hague, NL)
by Kassen 09 Jun '11

09 Jun '11

Fellow ChucKists, One of your Chuckist brothers and (lurtking?) list member, Caspar Schipper, is having a concert of his piece written in ChucK; Time 23 June · 19:30 - 21:30 Location Arnold Schoenbergzaal, Koninklijk Conservatorium, Den Haag Juliana van Stolberglaan 1 Den Haag, Netherlands FB event thingy; http://www.facebook.com/event.php?eid=222298021130975 The cool thing is that all of the DSP is written in ChucK itself. I think this is the first piece of any serious length and complexity like that that I heard of. Gossip has it that Caspar will publish a bit online about this and his process, but of course it'd be nice to come by if you have the chance. So; I thought I'd post this as I think Caspar is a bit modest and this seems quite interesting; the "sonology" department at the local conservatory is quite famous and I think this is the first example of more extensive ChucK usage there. Yours, Kas.

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Modulation of parameters "by hand"? Does ChucK have a function reference data type?
by Johnathan Bell 09 Jun '11

09 Jun '11

I'm trying to create a generic "modulation" function where I can give it some parameters to set up the modulation and a property to modulate. My current way of thinking would require passing a function object into the shred so that the parameter to be modulated can be chosen at the time of the function calling... Now I know already that I can't do something like the following: --code-- // A failed attempt at tremolo SinOsc osc1 => Gain master => dac; 440 => osc1.freq; SinOsc lfo => master.gain; 5 => lfo.freq; .3 => lfo.gain; --/code-- So thus I set up this function: --code-- fun void tremolo(Gain noteGain) { SinOsc lfo => blackhole; 5.75 => lfo.freq; .3 => lfo.gain; while (true) { 1-lfo.last() => noteGain.gain; // Assume "resolution" is a dur such as 10::ms, it is the resolution of our modulation resolution => now; } } --/code-- And spork it with a gain object to modify... That works great, but I'll need to code a separate function for every single possible parameter that I'd want to modulate, so is there a way of specifying the specific parameter on the function call instead of the whole object, for instance, the prototype could be: --code-- fun void modulate(FunctionObject param) --/code-- And then the updated values would (in theory) be ChucK'ed directly to that "param" instead of object.parameter? I tried setting it up this way but I don't seem to know the object type for passing a function reference, if there is one. Or maybe someone else has a better idea that I haven't thought of? - JB

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pieces written in ChucK
by Joel Matthys 09 Jun '11

09 Jun '11

I've been teaching ChucK to my Intro to Electronic Music students this quarter at CCM here in Cincinnati, and I've struggled to find recordings of pieces to play in class. I have one: http://soundcloud.com/jwmatthys/shearpin Are there others out there? Is there a reason so few use ChucK for fixed-format? Joel

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ChucK and Pulseaudio (Ubuntu 10.04)
by Lucas Zawacki 09 Jun '11

09 Jun '11

Hey guys. I've recently crafted some fun stuff with chuck and I'd like to make a recording of my desktop together with the sound I'm generating. I'm on Ubuntu, using gtk-recordmydesktop for this purpose and everything is fly until I try to capture the audio.... It seems that ChucK is not sending it directly to pulse, so when I try to record from it I get no sound. Notice that other apps, like my music player, do get recorded correctly. I'm using chuck-alsa, but I tried chuck-oss too with no success. I even tried chuck-jack and then things went pretty bad, but I suspect it's recordmydesktop fault. All in all I need some help here... is there a reason why chuck-alsa is not routing through pulse? Thanks in advance.

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Re: [chuck-users] pieces written in ChucK
by Joel Matthys 08 Jun '11

08 Jun '11

We perform Clix with CiCLOP, the Cincinnati Composers Laptop Orchestra Project. Most of our DSP is in ChucK. Joel On Wed, 2011-06-08 at 12:00 -0400, 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. pieces written in ChucK (Joel Matthys) > 2. Re: pieces written in ChucK (Mark) > 3. Re: pieces written in ChucK (Mark) > MHTML Document attachment > > -------- Forwarded Message -------- > > From: Joel Matthys <jwmatthys(a)yahoo.com> > > Reply-to: ChucK Users Mailing List > > <chuck-users(a)lists.cs.princeton.edu> > > To: chuck-users(a)lists.cs.princeton.edu > > Subject: [chuck-users] pieces written in ChucK > > Date: Tue, 07 Jun 2011 15:16:40 -0400 > > > > I've been teaching ChucK to my Intro to Electronic Music students > > this quarter at CCM here in Cincinnati, and I've struggled to find > > recordings of pieces to play in class. I have one: > > > > http://soundcloud.com/jwmatthys/shearpin > > > > Are there others out there? Is there a reason so few use ChucK for > > fixed-format? > > > > Joel > MHTML Document attachment > > -------- Forwarded Message -------- > > From: Mark <mark.cerqueira(a)gmail.com> > > Reply-to: ChucK Users Mailing List > > <chuck-users(a)lists.cs.princeton.edu> > > To: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu> > > Subject: Re: [chuck-users] pieces written in ChucK > > Date: Tue, 7 Jun 2011 12:24:50 -0700 > > > > CliX, written by Ge, is written purely in ChucK. Listen to it here: > > > > > > http://plork.cs.princeton.edu/listen/green/ > > > > > > It's part of PLOrk's main repository (I think) which can be > > downloaded here: > > > > > > http://wiki.cs.princeton.edu/index.php/PLOrk_Rep#to_download... > > > > > > OR if you're feeling adventurous you can use the multicast version I > > adapted for my thesis research a while ago. It'll work as long as > > your router doesn't suck at multicasting. :P > > > > > > https://github.com/markcerqueira/lorknet/tree/master/PLOrk/CliX-multicast > > > > > > mc > > > > On Jun 7, 2011, at 12:16 PM, Joel Matthys wrote: > > > > > I've been teaching ChucK to my Intro to Electronic Music students > > > this quarter at CCM here in Cincinnati, and I've struggled to find > > > recordings of pieces to play in class. I have one: > > > > > > http://soundcloud.com/jwmatthys/shearpin > > > > > > Are there others out there? Is there a reason so few use ChucK for > > > fixed-format? > > > > > > Joel > > > _______________________________________________ > > > chuck-users mailing list > > > chuck-users(a)lists.cs.princeton.edu > > > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > > > > > MHTML Document attachment > > -------- Forwarded Message -------- > > From: Mark <mark.cerqueira(a)gmail.com> > > Reply-to: ChucK Users Mailing List > > <chuck-users(a)lists.cs.princeton.edu> > > To: Mark <mark.cerqueira(a)gmail.com> > > Cc: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu> > > Subject: Re: [chuck-users] pieces written in ChucK > > Date: Tue, 7 Jun 2011 12:28:08 -0700 > > > > ...and I totally misread your email - CliX is not fixed-format. > > Woops! > > > > > > mc > > > > On Jun 7, 2011, at 12:24 PM, Mark wrote: > > > > > CliX, written by Ge, is written purely in ChucK. Listen to it > > > here: > > > > > > > > > http://plork.cs.princeton.edu/listen/green/ > > > > > > > > > It's part of PLOrk's main repository (I think) which can be > > > downloaded here: > > > > > > > > > http://wiki.cs.princeton.edu/index.php/PLOrk_Rep#to_download... > > > > > > > > > OR if you're feeling adventurous you can use the multicast version > > > I adapted for my thesis research a while ago. It'll work as long > > > as your router doesn't suck at multicasting. :P > > > > > > > > > https://github.com/markcerqueira/lorknet/tree/master/PLOrk/CliX-multicast > > > > > > > > > mc > > > > > > On Jun 7, 2011, at 12:16 PM, Joel Matthys wrote: > > > > > > > I've been teaching ChucK to my Intro to Electronic Music > > > > students this quarter at CCM here in Cincinnati, and I've > > > > struggled to find recordings of pieces to play in class. I have > > > > one: > > > > > > > > http://soundcloud.com/jwmatthys/shearpin > > > > > > > > Are there others out there? Is there a reason so few use ChucK > > > > for fixed-format? > > > > > > > > Joel > > > > _______________________________________________ > > > > chuck-users mailing list > > > > chuck-users(a)lists.cs.princeton.edu > > > > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > > > > > > > > > > > _______________________________________________ > chuck-users mailing list > chuck-users(a)lists.cs.princeton.edu > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

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Resignation and transition
by Adam Tindale 06 Jun '11

06 Jun '11

Hi All, I would like to send my official resignation as a core member of the documentation team. I no longer use ChucK to the extent that I am an expert and I have not committed to the documentation in at least a year. I want to see the community flourish, as I see on the list, and as such I am serving as a gatekeeper to updating and improving the manual. Last year we tried a documentation push that had some interesting developments and I think was ultimately a failure because we did not push enough traffic there. Their export to PDF was ( and in my opinion still is) inadequate for generating a manual that can be shipped with ChucK. My suggestion moving forward is to move to Markdown or asciidoc for generating files that can be easily turned into html or pdf with appropriate style files for each. Github has proved to be an excellent place for collaborating on these types of projects and I would suggest that as a place to get the migrating going. I would be more than happy to help with the migration to a new platform or to help a new person get up to speed on how I generated the PDF manual so they can continue to update it with all of the great discoveries and suggestions on the list. I would also be happy to do some actual porting work of the documentation to a new system that can be more easily maintained if that is what is deemed necessary by the community or new point person. For history, the original manual was generated by me with help from Ge and Phil sometime in 2005 or so. I got into ChucK very seriously at that point and emailed the list or Ge personally to figure out how to do certain things in the language. For every email Ge sent me I created a tutorial or reference and compiled it into a document. Ge, Phil, and I spent many a night generating web references, then I would port that to LaTeX for the PDF manual. Since that time many other people have contributed references that have since been included in the manual and it has grown to the document we know today. It was a lot of fun and I think it had a significant impact on getting new users into ChucK. I want to thank the ChucK team and community, and I look forward to helping you get to the next place. Adam (--art)

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Gyration Air Mouse
by Les Hall 06 Jun '11

06 Jun '11

Good day ChucKists! I have finally purchased what looks to be a good motion controller for my particular needs. It is the Gyration Air Mouse Elite. It works great, though my first code attempt at varying a SinOsc produced more zipper than actual sine wave, lol. I know the zipper cannot be avoided in practice, so I'll work on ways to minimize it and /or make use of it. Now, to my question: How do I access all of the axes? This device has a 2-axis gyro and a 3-axis accelerometer, which IMHO packs a powerful punch missing only the roll gyro. I can do all sorts of stuff with it, but I need to get at that axis data. I'm sure it's very simple, how do i do it? Les

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Instrument Pickups for Ajay and Others
by Les Hall 04 Jun '11

04 Jun '11

This post is somewhat off-topic to ChucK itself, so please skip it if that bothers you, thanks. All this celebration of Ajay Kapur and the amazing work that he and his students are doing reminded me of a sort of reinvention that my Swedish friend Are and I created together some time ago. It's a type of stringed instrument pickup that has unique properties making it very suitable for creating one's own stringed instruments. I know that part of the ChucK world involves creating unique instruments including stringed ones, so I thought I'd post here. I say reinvented because after we created it, we found prior art in the patent record going back to the 1930's if I recall correctly, and we never did patent out little twist on the theme that made it practical today, so it's yours to use freely. It works by putting neodymium magnets under the strings and then amplifying the tiny currents created in the strings themselves as they vibrate in the magnetic field. Since there are no coils of wire, there is no second-order filter to distort all those beautiful harmonics, and the sound is more "clean" or harp-like than a conventional wound pickup. There are quirks to these pickups, but they are minor to most listeners. You can read all about this new-old pickup system here: http://echuck.othomann.de/eChucK/Guitar_Kit.html Oh, and we did ask for a small contribution from anyone who used it, but not only is that a voluntary gesture, for educational purposes we can waive it altogether. If someone uses the pickup system and tells us about it, that will be plenty reward enough. Please feel free to forward this message or the web link to any related list or person or whatever. Thanks, Les

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