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

Frequency domain and fractals?
by Wolfgang Gil 29 Jan '11

29 Jan '11

Hello, Does anyone knows about any interesting book, paper, etc using chaos for sound generation? I have seen some documentation about chaos and music but until now everything has been related to the organization of the notes through a "chaotic system". None of them to the actual generation of sound. I'm wondering if it would be interesting to employ non-lineal equation's systems to populate fft matrixes (like the Gabor matrix) and then translate that data into sound using inverse fft... Any thought? -- Wolfgang Gil http://www.wolfganggil.com

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The ChucK Method Book
by Zed A. Shaw 28 Jan '11

28 Jan '11

Hi folks, long time lurker, infrequent poster. I've recently finished a book for Python and I'd like to do a similar one for ChucK. The Python book is "Learn Python The Hard Way" and it's written similar to a guitar method book: http://learnpythonthehardway.org/ What I'd like to do next is a "ChucK Method Book" in a similar style, but actually make it more like a real method book for an instrument where the student is learning to "play chuck" like they would an instrument. If I were to do this, what do you think it should include? Do you think it's a good idea? Have you tried teaching ChucK? Thanks! -- Zed A. Shaw http://zedshaw.com/

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Re: [chuck-users] m-A to Quartz
by Anthony Bowyer-Lowe 28 Jan '11

28 Jan '11

Hi David, Yeah, Soundflower is what I would use for this. Set miniAudicle output device to Soundflower (2ch) and Quartz composer's audio input to the same. Sounds like you're doing something interesting! Best of luck, Anthony.

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m-A to Quartz
by David Løberg Code 27 Jan '11

27 Jan '11

How can I send the audio output from mini-Audicle to the input of a Quartz composer visualizer? (I want the m-A audio to go out to speakers AND to Quartz...just like iTunes.) Do I use Soundflower? Do I need to create aggregate audio device? thanks, david David Loberg Code School of Music Western Michigan University Kalamazoo, MI 49024 269-387-4667 code(a)wmich.edu

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Re: [chuck-users] Chaos functions in ChucK.
by Anthony Bowyer-Lowe 25 Jan '11

25 Jan '11

Hey Ronni, I have been meaning to implement some chaotic type functions in ChucK for some time: Perlin noise, Buchla-esque source of uncertainty, Brownian motion LFO, composite complex modulation sources, etc. I have some personal audio design projects coming up for which I intend to prototype the synth system in ChucK so, if I get time, if you're lucky, and if I make anything of worth, I'll share what is produced. A. > other question , Do any body have made chaos functions in chuck? or > maybe there are examples of this? >

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input gain analysis, LiSa example
by Michael Heuer 22 Jan '11

22 Jan '11

Hello ChucKers, I'm thinking of giving the RPM challenge (http://rpmchallenge) a try this February and am missing two things from my ChucK kit 1) A ChucK snippet to analyze the gain of an input signal. I could just watch for peak values every sample but that doesn't seem like the right thing to do. 2) An example/tutorial of how to use LiSa to approximate a looper pedal (record, overdub, undo, redo). See e.g. http://www.essej.net/sooperlooper/ http://web.mit.edu/~eric_r/Public/mmmtsss/ Thanks in advance, michael

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Re: [chuck-users] Using Fourier Transform
by Rebecca Fiebrink 16 Jan '11

16 Jan '11

Hi Lucas, Sorry for the late reply. But since one doesn't really learn the true nature of the FFT in 5 days, I think this may still be helpful. My favorite resources for learning & teaching about FFT are: - Julius Smith's online tutorial: https://ccrma.stanford.edu/~jos/mdft/ - Ken Steigglitz's book: http://www.amazon.com/Digital-Signal-Processing-Primer-Applications/dp/0805… This book will teach you not just about FFT, but about musical signal processing in general -- it's well worth the money. Both are written with music in mind. For a much higher-level overview, you can see my FFT "cheat sheet" here: http://www.cs.princeton.edu/~fiebrink/314/2010/week8/FFT_handout_2010.pdf along with code examples from that day of class here http://www.cs.princeton.edu/~fiebrink/314/2010/week8/ and scribe notes (written by a student) here http://www.cs.princeton.edu/~fiebrink/314/2010/week8/scribe_Mia.pdf Best, Rebecca On 2011-01-11, at 9:00 AM, chuck-users-request(a)lists.cs.Princeton.EDU wrote: > > Date: Tue, 11 Jan 2011 09:27:42 -0200 > From: Lucas Zawacki <lfzawacki(a)gmail.com> > To: ChucK Users Mailing List <chuck-users(a)lists.cs.princeton.edu> > Subject: [chuck-users] Using Fourier Transform > Message-ID: > <AANLkTi=vBnKCqQoKaii3Bq1jscdnqqLd1j21PUkBsPPi(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Sup guys. This is not much of a ChucK question but here goes... > > I have some free time now to experiment with ChucK and I dug up some > old emails from the list. There's one talking about analysing the > frequency of a given signal and the short answer was to use the FFT. > > I decided I would try this aproach in order to receive input from my > guitar, match the frequency being played and then issue a MIDI event > to another synthesizing app. The problem is that I have a very > abstract understanding of the FFT (I've used it before to do simple > image processing). It does makes sense to me, e.g I can visualize in > my mind what the FFT of a simple sound wave would look like, but I > wasn't competent enough to extract the absolute pitch data that I > wanted. > > Anyway can someone elaborate a little more on the topic of frequency > analisys or maybe point me to a good tutorial? > > I think I'll start with the wikipedia article on the Fourier Transform > and see where it gets me... > > -- > http://www.twitter.com/lfzawacki > http://www.linesocode.wordpress.com > > > ------------------------------ > > _______________________________________________ > chuck-users mailing list > chuck-users(a)lists.cs.princeton.edu > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users > > > End of chuck-users Digest, Vol 66, Issue 9 > ******************************************

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Music Hack Day coming to New York
by Jordan Orelli 13 Jan '11

13 Jan '11

there's an audio-related hackathon coming up in NYC. 16 spots left. I'll definitely be in attendance. It'd be cool if there was some ChucK presence there :-D http://nyc.musichackday.org/

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Using Fourier Transform
by Lucas Zawacki 11 Jan '11

11 Jan '11

Sup guys. This is not much of a ChucK question but here goes... I have some free time now to experiment with ChucK and I dug up some old emails from the list. There's one talking about analysing the frequency of a given signal and the short answer was to use the FFT. I decided I would try this aproach in order to receive input from my guitar, match the frequency being played and then issue a MIDI event to another synthesizing app. The problem is that I have a very abstract understanding of the FFT (I've used it before to do simple image processing). It does makes sense to me, e.g I can visualize in my mind what the FFT of a simple sound wave would look like, but I wasn't competent enough to extract the absolute pitch data that I wanted. Anyway can someone elaborate a little more on the topic of frequency analisys or maybe point me to a good tutorial? I think I'll start with the wikipedia article on the Fourier Transform and see where it gets me... -- http://www.twitter.com/lfzawacki http://www.linesocode.wordpress.com

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TweecKs
by Spencer Salazar 07 Jan '11

07 Jan '11

Hello everyone! Inspired by a forum thread[1], a Stanford CCRMA homework assignment[2], and something similar I heard about in the SuperCollider world, I have created a community-driven Twitter account for the express purpose of broadcasting meaningful, self-contained ChucK programs that fit into a single tweet. The programs tweeted from this account will be based on submissions from folks like yourselves. I will be acting in a limited curatorial role due to the nature of this sort of thing, but the goal is really to get as many interesting programs from as many people as possible. Without further ado: http://twitter.com/TweecKs To submit your program, simply tweet it to @TweecKs. You can also send me an email: spencer at ccrma.stanford.edu. If you send me an email, please make sure your program is 140 characters or less, including a block comment with a credit (if desired). There aren't any guidelines as far as quality; as long as it runs, makes sound, and doesn't do anything apparently malicious to people's computers, its good! And, if you are a Twitter user, do consider following @TweecKs, to stay up-to-date on the latest in concise audio programming! [1] http://electro-music.com/forum/viewtopic.php?t=13512 [2] https://ccrma.stanford.edu/wiki/220b-winter-2011/hw0#Specification_.28part_…

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