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

chuck and jack
by Bozelos Dimitris 03 Sep '09

03 Sep '09

Hello, I'm using chuck under linux with jack audio server. Although it is working generally fine, sometimes I get unexpected clicks with error messages in the jack window and I'm trying to figure out what's wrong. I suspect that it is a problem with how linux handles interrupts in real time. The reason I'm posting here is that I think that the cause might be that I'm often printing on the terminal with <<< >>>; and that, I think demands an interrupt. Because the request comes from chuck which is granted real time priority by jack, it might interrupt the audio and at some points I get these clicks. Does this make sense? Has anyone encountered a similar problem with chuck and jack? In this case, has anyone used any alternative way of getting feedback from chuck? Maybe, instead of formatting a string and printing on a terminal, send a string through osc to some other interface which would update a constantly displayed message or variable which might be less demanding and not real time priority? Any ideas of what this could be? That is similar to another problem I have encountered so far, many times I would like to keep an eye to various parameters, both current values and how they change over time, but printing the value on the terminal only when it changes is not enough. Any ideas welcome. Cheers, Dimitris ___________________________________________________________ Χρησιμοποιείτε Yahoo!; Βαρεθήκατε τα ενοχλητικά μηνύματα (spam); Το Yahoo! Mail διαθέτει την καλύτερη δυνατή προστασία κατά των ενοχλητικών μηνυμάτων http://login.yahoo.com/config/mail?.intl=gr

4 9

Full path with drive letters?
by Chris McDaniel 31 Aug '09

31 Aug '09

Hello, I'm using chuck in windows (7 RC) and I'm seeing something quite odd... When I execute something like: E:\tools\chuck-1.2.1.2-exe\bin>chuck.exe "e:\tools\OSCSurface\ osc_surface_example.ck" I get this as a result: [e]: no such file or directory So, either Chuck doesn't know drive letters, or Windows 7 is doing something odd. Can anyone confirm? Note that this: E:\tools\chuck-1.2.1.2-exe\bin>chuck.exe "\tools\OSCSurface\ osc_surface_example.ck" Works fine, but I'm giving OSCSurface a try and that's not the way it likes to work... Thanks, Chris

1 0

Re: [chuck-users] The ChucK Show
by Les Hall 31 Aug '09

31 Aug '09

Kassen, I didn't tune the chime, ran out of time. Maybe I can work on it this week. We has SO MUCH FUN on the game show last week that now I've decided to do another game show next week. In addition to the main theme of "name that tune" and the secondary theme of "the gong show", I think I'll add a choice of "door number one, door number two, and door number three". Should be a great time as everyone enjoyed it last week. There will of course be plenty of ChucK from various artists on the game show. Les

1 0

Using UGen as a function arg
by Andrew C. Smith 31 Aug '09

31 Aug '09

Hey everyone, I just found out that you could use more specific classes as function arguments (I know, a little slow). So, I've got: fun void modulator (UGen a, DelayL b) ... while(1) { a.last()::ms => b.delay; 1::samp => now; } and it totally works! Here's the catch: is there a way to make something like this that will work for more general classes? I mean, why don't DelayL and DelayA and Delay all inherit from some more general class that uses a dummy "delay" and "max" argument, so that we can build some awesome functions that have universal applications? There could be an oscillator class to encompass everything with a freq, phase, and sync attribute, and so many others that would make modulating so much easier. I expect there to be a totally reasonable answer, because I don't really know much about programming at all, but this seems like it would make sense. Or, is there a way to do what I want to do (build more general modulation functions) within the existing framework? I'd ideally like something that can spork a shred to modulate a random parameter, then fade out at the end, so that it's like the signal is receiving random interference that makes it ring mod or something. I can probably figure out how to do it with millions of lines of code, but the more work it is the less likely it is that I'll finish it. Thanks everyone. Andrew

2 1

NYC-Based ChucKists: "Cloud Seeding" Sept. 1st @ The Stone, 8pm
by mike clemow 30 Aug '09

30 Aug '09

Hello, If any of you are in or will be in the New York City area this coming Tuesday, I'm playing an hour-long set at a place called The Stone that will be all about Granular Synthesis / Resynthesis in a performance setting. If you'll be in the area, it will be a cool show to see--everything is written in ChucK. I'm planning on doing a quasi-participatory didactic thing with the audience to teach them about granular synthesis as I demonstrate the instruments I've built, so it's a little non-traditional as far as concert flow. Even if you won't be in the area, you might want to take a look through my (spaghetti) code. As Kassen can tell you, my attempts at doing granular synthesis in ChucK border on obsession and have spent a long time trying to squeeze out as much performance while keeping it as easy to program as possible. For this show, I've built instruments that take their spectral profiles from small audio files that I've run through the Spear program for analysis (http://www.klingbeil.com/spear/). Spear does "Sinusoidal Partial Editing Analysis and Resynthesis" and does a really good job at FFT analysis with transient sharpening and all kinds of other goodies. Spear outputs its information as a text file and I'm using the file IO routines that are currently only in the bleeding-edge CVS version of ChucK to parse these files into reasonably useful datasets. Then I'm using standard HID stuff and a modified gamepad for interaction. It's far from perfect, but it's a playable prototype. I'll have this stuff organized and posted on my website and github by the show date (hopefully). I'd really love to get some feedback on the code for the future. Plus, if anyone is interested in getting a head start parsing Spear files with ChucK, this might be helpful. There's a possibility that I'll document the show, so there might also be video at some point. -Mike "Cloud Seeding" Performing Granular Synthesis Tuesday, Sept. 1st - 8pm @ The Stone - www.thestonenyc.com $10 -- http://michaelclemow.com http://semiotech.org

3 5

The ChucK Show
by Les Hall 30 Aug '09

30 Aug '09

This week's show went over very well. It was a game show as described previously. We had a blast. Recording is available here: http://electro-music.com/forum/viewtopic.php?t=36510 Les

2 1

analysis examples
by Kassen 28 Aug '09

28 Aug '09

Dear Ge & Rebecca, The previous version of ChucK had a /examples/analysis/tracking directory with a great example called "tracking.ck" in it. In the latest download that's gone. It's not so clear to me why that example should be gone because that happened to be the one that makes it clear how the numbers in the array that FFT yields relate to frequencies in the most clear way. On top of that it's fun and practical. As interesting as the examples with the current release might be they don't really make it clear what they are trying to accomplish and how. They run... they computate some numbers and print them but it's not explained what those numbers represent or why we would be interested in them. Because of a recent question on the forum about pitch tracking/detection I dug up the old example to post as a explanation and had to wonder about the how and why of the current range of examples. Much of it is quite baffeling to me; I'd be hard pressed to explain what goes on in the fft examples and the feedback they use. The code of the tracking one may be far longer and more involved but it's purpose is clear, it invites "poking around" and so I think it makes for a practically educational example to include. Yours, Kas.

2 2

Re: [chuck-users] One thing that ChucK *really* needs
by David Rush 27 Aug '09

27 Aug '09

Sorry about this. I had forgotten about the isomorphism between chucking and function calls...Nothing to see here folks...move along :P 2009/8/27 David Rush <kumoyuki(a)gmail.com>: > Is attribute propagation when chucking values. e.g. > > class A > { > B used; > } > > class B > { > float freq; > } > > A a; > > 440.0 => a.used.freq; // ICK! > > It would be really lovely to have some way to just write > > 440.0 => a.freq; > > Now this probably means some way of defining synthetic attributes > (along the lines of what is in C#), but I think that this would > greatly improve usability for programming geek ChucKists as well as > musical ChucKists. At the very least, it allows code that uses a class > to be unaware of it's implementation details. This is an actual > problem for me as my algorithmic composition framework grows. > > Just $0.02 worth > > david rush > -- > GPG Public key at http://cyber-rush.org/drr/gpg-public-key.txt > -- GPG Public key at http://cyber-rush.org/drr/gpg-public-key.txt

1 0

ChucK a day + php syntax highlighter
by Scott Hewitt 26 Aug '09

26 Aug '09

hi, Hope this is appropriate here. After dipping in and out of Chuck for the last couple of years I have decided to dive in so have been doing my own ChucK a day thing you can see it at www.ablelemon.co.uk/chuckaday. If any one has any suggestions as to things to try please let me know. As part of the processes I have been building a chuck php syntax highlighter. At the moment it is a bit of a mess but am working to clean it up for release. happy ChucKer Scott

4 6

The ChucK Gong Show
by Les Hall 24 Aug '09

24 Aug '09

OK, news: The ChucK Show has degenerated into The Gong Show with both reckless joy and disgrace, ah well. We're going to do a "Name - that - tune" style show next friday at 7pm EST on www.electro-music.com and it will also be like "The Gong Show". Everyone in the chatroom gets one gong. We try to name that tune but if someone gets sick of the song they can gong it with their one and only gong. Of course, once someone has gonged we are all free to commence gonging until the hosts notice or whatever. So gong only once yet gong at will. Aside from that points will be tallied up for who first mentions the artist, title, and instrument of the song. So you can win up to three points per song. The judging will be randomly and haphazardly done by whoever is appointed plus me at the moment. So join us, and I also have a request... I need game show sounds in ChucK to add to my controller program for the show. A big old gong would be nice, plus maybe some buzzers or whatever. If you would like to contribute to the show's sound effects please post your code to this list or to the forum. Thanks, Comically yours, Les

1 0