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

OSX updates =< real-time audio?
by Ge Wang 16 Apr '08

16 Apr '08

Greetings, We are experiencing some rather unfriendly real-time behavior on OS X, seemingly after doing the latest apple upgrades... here are some details, at least on my machine: * system: Macbook Pro / OS X (10.4.11) * updates: Quicktime 7.4.5 + MPB EFI Firmware Update 1.5 * symptoms: real-time audio "goes to poop", even under moderate loads. * workaround: running command line chuck in BLOCKING mode (via --blocking) seems to work, however the default CALLBACK mode seems completely hosed, even with bigger buffer sizes. This is especially problematic for the miniAudicle, which doesn't have the option currently to choose between blocking vs. callback. Has anyone else noticed similar behavior, either on Tiger or Leopard? Or is this an isolated case for my system? We'd appreciate any input! Thanks!! Best, Ge!

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low overhead interpolation trick
by Kassen 12 Apr '08

12 Apr '08

Dear ChucKists. I was running out of fingers and buttons on my joypad... who-ever decided the thumbs should share both the analogue sticks and the buttons on the top? Anyway, I picked up a tilt-sensing joypad. Sadly proper tilt sensors are relatively expensive and games devices typically get made as cheaply as possible (grumble). To cut a long story short; it sends a fury of values that are somewhere around the value that it needs to be. Result; the poll-rate gets to be a kind of noisy harmonic. So; this leads to the question of how to interpolate this mess without making complex function calls at this high poll-rate and cook the poor CPU before we get any sound made at all. Solution; as soon as I get the value the axis moved to I write that to a Step Ugen's ".next()". Then; Step my_axis => LPF my_interpolation => blackhole; //set to taste, it's latency v.s. noise //maybe a rate that's relatively prime to the poll-rate would be best? 5 => my_interpolation.freq; then my_interpolation.last() can be polled at whatever rate makes sense. It can also be chucked directly to Ugens like oscillators set to act as a FM synth (use the filter's gain to scale) or to Gain's set to multiply. Very cheap and so far quite pleasant to work with, I thought I'd share. Yours, Kas.

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Future ChucK: wish list items and one comment
by Inventor-66＠comcast.net 02 Apr '08

02 Apr '08

Dear ChucKists, I look into my crystal ball and I see the future of ChucK, AKA my wish list: o MAUI ported to PC/Linux (on the way, woohoo!) o fix noteOff () problem o String Processing: preferably inspired by Perl o File I/O: I want to save and load program settings o printf (): formatted text/numeric output. o Hierarchical Events: i.e. event when any button in an array is pressed o MAUI Expansion: Text I/O, File Browser, 2D drawing, 3D drawing, etc. o Garbage Collection o Tube Amplifier UGen o Piano STK Instrument And there is one observation I'd like to share... Aside from it's musical capabilities, the one outstanding feature of ChucK to me is the way that everything works together. ChucK is very Apple/Linux-like in the way that it seems to be so well thought out. Of the dozen or two languages I've played with over the years, ChucK has got to be the most fun and the easiest to code because stuff just plain works. So my hat's off to the dev ChucKists, us user ChucKists are having a blast with your hard work! Inventor p.s. I went retro on the Pong game with the square ball as I remember from our Pong unit we had as kids, though I agree the LED would be way cooler. Maybe make it blink all three colors...

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MAUI: Surf's Up!
by Inventor-66＠comcast.net 31 Mar '08

31 Mar '08

spencer, A thousand thank-you's oh mighty code warrior, as Klinger of M*A*S*H would say... I'm happy to hear that MAUI is on the way soon! I've written two applications in MAUI, Guitar Lab and Synth Lab, and probably 2/3 of my audience can't run the software right now. It will be a big relief when they can, plus the flurry of activity as our PC/Linux friends add MAUI to their programs should be fun. So thanks and good luck with your coding! Inventor

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MAUI for PC/Linux
by Inventor-66＠comcast.net 31 Mar '08

31 Mar '08

It seems that there is a strong demand for the MAUI port to PC and Linux versions of the miniAudicle. In fact there's so much demand for a ChucK GUI that three or four people have created their own ChucK GUIs and posted about them to the forum. Being gifted with MAUI powers as a Mac user, it is unfortunate that I cannot share my MAUI programs with many fellow ChucKists. I wonder if we could get some news about the MAUI porting progress? Perhaps someone on the dev team can fill us in? Inventor

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chuck under leopard
by eduard aylon 30 Mar '08

30 Mar '08

Hello list, I've upgraded my os x from tiger to leopard (reason: the latest apple combo update screwed my 10.4 system..:( ) and now, when running chuck, I get the following error: chuck[11494:10b] Error loading /Library/Audio/Plug-Ins/HAL/ DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio: dlopen(/Library/ Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio, 262): Symbol not found: __keymgr_get_per_thread_data Referenced from: /Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/ Contents/MacOS/DVCPROHDAudio Expected in: /usr/lib/libSystem.B.dylib 2008-03-29 23:19:31.110 chuck[11494:10b] Cannot find function pointer NewPlugIn for factory C5A4CE5B-0BB8-11D8-9D75-0003939615B6 in CFBundle/ CFPlugIn 0xc115c0 </Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin> (bundle, not loaded) [test.ck]: syntax error yet, chuck seems to perform alright. Has anyone had the same? any solutions or ideas on what this error means and how is this affecting chuck? BTW, I'm running chuck-1.2.1.1. thanks, eduard

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Re: [chuck-users] maui/widgets under linux
by pibsid＠suomi24.fi 30 Mar '08

30 Mar '08

>Better question: why is there no information on the chuck or >miniAudicle pages on how to contribute code? I think the best way to >get things moving with chuck would be to make it easy for people to >help. This means providing instructions on the code repository, >possibly providing a patch submission system, having some developer >documentation, and having an active maintainer willing to integrate >patches and discuss ideas. I'd like to contribute but I don't know in what kind of format I should write my patches and where I should post them. Some developer friendly pages would indeed be welcome. -Pyry Pakkanen

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Bay Area Computer Music Technology Group @ Ex'pression, Thursday April 3rd
by Noah Thorp 29 Mar '08

29 Mar '08

The Bay Area Computer Music Technology Group Thursday, April 3rd, 7:30 - 9:30PM @ Ex'pression College for Digital Arts (http://www.expression.edu/) 6601 Shellmound St, Emeryville, CA 94608 RSVP Here: http://electronicmusic.meetup.com/152/calendar/6921818/ Presenters: - Jaron Lanier on intersections of computer music, artificial intelligence, virtual reality, and biomimicry: http://www.jaronlanier.com/ - Chris Chafe on networked audio applications: http://ccrma-www.stanford.edu/~cc/ - Lightning talk by Ge Wang on the instantiation of the Stanford Laptop Orchestra (SLOrk) and upcoming Laptop Orchestra of the Left (L.O.L.): http://ccrma.stanford.edu/~ge/ Thanks to Ex'pression College for the Digital Arts for hosting our event this month! Please note that you must RSVP this month as there will be a sign in list at Ex'pression College. RSVP here: http://electronicmusic.meetup.com/152/calendar/6921818/ Hope to see you there. All the best, Noah Thorp Bay Area Computer Music Technology Group Organizer http://electronicmusic.meetup.com/152/ noah [the at sign] listenlabs [a dot] com BIOS CHRIS CHAFE Chris Chafe is a composer / cellist / music researcher with an interest in computer music composition and interactive performance. He has been a long-term denizen of the Center for Computer Research in Music and Acoustics, Stanford University where he directs the center and teaches computer music courses. His doctorate in music composition was completed at Stanford in 1983 with prior degrees in music from the University of California at San Diego and Antioch College. Two year-long research periods were spent at IRCAM, and the Banff Center for the Arts developing methods for computer sound synthesis based on physical models of musical instrument mechanics. Current projects include the "SoundWIRE" experiments for musical collaboration and network evaluation using high-speed internets for high-quality sound. He has performed his music in Europe, the Americas and Asia, and composed soundtracks for documentary films. Two recent discs of his works are available from Centaur Records. In Spring 2001, a collaboration with artist Greg Niemeyer entitled Ping was exhibited at SF MOMA and online via the Walker Art Center. A second collaboration, Oxygen Flute, was created for the San Jose Museum of Art. A CD of music from both installations is also available. "Organum" is their present project, a completely synthetic animation being developed for digital planetariums and individual game play. JARON LANIER Jaron Lanier is a computer scientist, composer, visual artist, and author. His current appointments include Interdisciplinary Scholar-in-Residence, CET, UC Berkeley. Lanier's interests include biomimetic information architectures, user interfaces, heterogeneous scientific simulations, advanced information systems for medicine, and computational approaches to the fundamentals of physics. He collaborates with a wide range of scientists in fields related to these interests. Lanier's name is also often associated with Virtual Reality research. Indeed, he did coin the term 'Virtual Reality' and has pioneered numerous technologies in this field. "Jaron's World" is his monthly column in Discover Magazine, and is devoted to his own wide ranging ideas and research. His writing has appeared in The New York Times, Discover, The Wall Street Journal, Forbes, Harpers Magazine, The Sciences, Wired Magazine (where he was a founding contributing editor), and Scientific American. He has edited special "future" issues of SPIN and Civilization magazines. As a musician, Lanier has been active in the world of new "classical" music since the late seventies. He is a pianist and a specialist in unusual musical instruments, especially the wind and string instruments of Asia. He maintains one of the largest and most varied collections of actively played rare instruments in the world. Lanier has performed with artists as diverse as Philip Glass, Ornette Coleman, George Clinton, Vernon Reid, Terry Riley, Duncan Sheik, Pauline Oliveros, and Stanley Jordan. Current recording projects include his "acoustic techno" duet with Sean Lennon and an album of duets with flautist Robert Dick. He also writes chamber and orchestral music. Current commissions include an opera that will premier in Busan, South Korea. Recent commissions include: "Earthquake!", a ballet which premiered at the Yerba Buena Center for the Arts in San Francisco in April, 2006; "Little Shimmers" for the TroMetrik ensemble, which premiered at ODC in San Francisco in April, 2006; "Daredevil" for the ArrayMusic chamber ensemble, which was premiered in Toronto in 2006; amongst many more. His CD "Instruments of Change" was released on Point/Polygram in 1994. Lanier has also pioneered the use of Virtual Reality in musical stage performance with his band Chromatophoria, which has toured around the world as a headline act in venues such as the Montreux Jazz Festival. He plays virtual instruments and uses real instruments to guide events in virtual worlds. For a full bio of Jaron: http://www.jaronlanier.com/general.html GE WANG Ge Wang received his B.S. in 2000 in Computer Science from Duke University and PhD in 2007 studying with Perry Cook in Computer Science at Princeton University, and is an assistant professor at Stanford University in the Center for Computer Research in Music and Acoustics (CCRMA). Ge conducts research in real-time software systems for computer music, programming languages, visualization, new performance ensembles (e.g., laptop orchestras) and paradigms (e.g., live coding), interfaces for human-computer interaction, pedagogical methodologies at the intersection of computer science and computer music. Ge is the chief architect of the ChucK audio programming language and the Audicle environment. He is a founding developer and co-director of the Princeton Laptop Orchestra (PLOrk), and a co-creator of the TAPESTREA sound design environment. Ge composes and performs via various electro-acoustic and computer-mediated means.

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maui/widgets under linux
by Atte André Jensen 29 Mar '08

29 Mar '08

Hi I'm wondering what's the status of a new release of chuck/miniAudicle? Mostly I'm hoping for maui/widgets to work under linux, will this happen? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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midi out
by Atte André Jensen 29 Mar '08

29 Mar '08

Hi For the first time I need to use midi out. I couldn't find any examples, but thought it might be similar to midi in, so I did: MidiOut midi_out; MidiMsg midi_msg; midi_out.open(1); 0 => midi_msg.data1; 0 => midi_msg.data2; 0 => midi_msg.data3; midi_out.send(midi_msg); But that gives me the following error: [chuck](via RtMidi): RtMidiOut::sendMessage: event parsing error! Could anyone point me in the direction of a working midi out example? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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