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

Re: [chuck-users] The ChucK Manual prerelease
by Felix Meinhold 02 Dec '05

02 Dec '05

Hi, > Do you have cvs access? You should be able to do an anonymous cvs checkout and > grab all of the code. If that doesn't work for you then I am more than happy to > host a tarred up version somewhere for people to check out. > > Here is how to do it: On Linux (or maybe on ArchLinux only) you have to tell cvs what remote shell to use for :ext: export CVS_RSH=ssh; cvs -d :ext:anon-chuck at cvs.cs.princeton.edu:/cvs checkout chuck_dev (export works with bash/zsh) felix

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The Freesound Project
by Nelson Ferraz 01 Dec '05

01 Dec '05

Interesting project: The Freesound Project aims to create a huge collaborative database of audio snippets, samples, recordings, bleeps, ... released under the Creative Commons Sampling Plus License. The Freesound Project provides new and interesting ways of accessing these samples, allowing users to * browse the sounds in new ways using keywords, a "sounds-like" type of browsing and more * up and download sounds to and from the database, under the same creative commons license * interact with fellow sound-artists! We also aim to create an open database of sounds that can also be used for scientific research. Many audio research institutions have trouble finding correctly licensed audio to test their algorithms. Many have voiced this problem, but so far there hasn't been a solution. http://freesound.iua.upf.edu/

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performance of chuck
by Atte André Jensen 30 Nov '05

30 Nov '05

Hi I've made a working version of the midi setup I've been rambling about. Now that I make som reak music with the setup I've made a few new observations. Most problematic is the fact that chuck often (well not often, but sometimes) click and pops, esp at noteons, but also other places. I guess I have to see if I can reduce the code run at noteon time, right? But besides that is there any general approaches for making chuck run more smoothly? Just as anoying is the fact that if I punish chuck with too many notes she breaks up the audio. That's just the way it is and I can live with that. But the problem is that after such an incident timing seems to be very sloppy. I could post some examples if someone care to look at them. I'm sure my code can be optimized quite a bit. But I guess the above is still valid since optimized code will behave similar if pressed hard enough. As a final remark at least the following code is totally un-elegant (I have a feeling Chorus is not the cheapest UGen around), but I can't figure out how to envelopes on a stereo signal (and Chorus is mono anyways, or?): sinosc s1 => ADSR env => pan2 pan; sinosc s2 => Chorus chor_l => ADSR env_l => pan.left; sinosc s3 => Chorus chor_r => ADSR env_r => pan.right; pan => dac NB: Still under linux/debian/unstable with realtime kernel from demudi. NB2: With csound I was able to enhance performance by running in a virtual terminal without X. But with chuck, that doesn't semm to make much difference. Neither does running as root. Neither does running with nice -19 and killing a few daemons.... -- peace, love & harmony Atte http://www.atte.dk

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stereo suggestion
by Atte André Jensen 30 Nov '05

30 Nov '05

Hi I mentioned this already in the middle of something else, but recieved no reply, so I thought I'd start a new thread. It would make sense to have all UGens stereo aware. This might include supplying all with a .pan, .left and .right parameter, but at least it should be possibe to route a stereo signal through them and get a stereo signal out. Would that be expensive, both in execution time and in coding time for the developers? -- peace, love & harmony Atte http://www.atte.dk

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Power operator in chuck
by Tennessee Leeuwenburg 30 Nov '05

30 Nov '05

Hi all, I just downloaded chuck. Perhaps I'm being a bit blind/dense, but there doesn't seem to be a simple power operator in chuck. Given that power-laws appear in many places, it would be a very useful operator. Hopefully I'm just missing it? Cheers, -T

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Re: [chuck-users] pitching samples
by Ollie Glass 29 Nov '05

29 Nov '05

Brilliant, this is exactly what I'm looking for. Thank you Atte. Ollie > Ollie Glaskovik wrote: > >> I'd like to make a pitched sample playing function which, given a >> sample at a known pitch (say C-2) and a MIDI pitch value (0-127), >> plays the sample at that pitch. I suppose this could be done with >> sndbuf's .rate function and some math but I'm not sure where to >> start. > > Given you have the midi pitch in the variable "note", the following > will work. "transpose" is just a handy way of transposing the > instrument, "root" is the known pitch of the sample. Note also that > mtof will work with float, so you can have 12.01 => transpose, to > transpose an octave + a cent. > > 12 => transpose; > 60 => root; > > sndbuf s => dac; > > std.mtof(note + transpose)/ std.mtof(root) => s.rate; > > -- > peace, love & harmony > Atte > > http://www.atte.dk

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which language resembles chuck the most
by Atte André Jensen 28 Nov '05

28 Nov '05

Hi I normally use ctags for finding my way through my own code. For those un-aware of ctags, its a utility that generates a TAGS file containing all functions and variables in a project. Armed with that emacs (or vi?) can quickly jump to the place where a certain definition is made, across files and directories. Now, ctags clearly needs to understand the structure of the code, and unfortunately (but understandably) chuck is not on the list of supported languages. But parsing in a syntactically similar language is often enough. My question is: which of the following languages resembles chuck the most, syntacticlly speaking (my guess is Java): [atte@aarhus midi_input_07]$ etags --list-languages Asm Asp Awk BETA C C++ C# Cobol Eiffel Erlang Fortran HTML Java JavaScript Lisp Lua Make Pascal Perl PHP Python REXX Ruby Scheme Sh SLang SML SQL Tcl Vera Verilog Vim YACC -- peace, love & harmony Atte http://www.atte.dk

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pitching samples
by Ollie Glaskovik 28 Nov '05

28 Nov '05

I'd like to make a pitched sample playing function which, given a sample at a known pitch (say C-2) and a MIDI pitch value (0-127), plays the sample at that pitch. I suppose this could be done with sndbuf's .rate function and some math but I'm not sure where to start. Any suggestions would be appreciated. Thanks, Ollie

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sndbuf vs WaveLoop
by Atte André Jensen 28 Nov '05

28 Nov '05

Hi I tried both sndbuf and WaveLoop for playing and there seems to be a problem with both: sndbuf sounds like 8 bit, maybe the interpolating is broken? WaveLoop sounds fine, but is out of tune, something like 250 cents (from memory). This is all under debian/linux/unstable with the latest chuck... -- peace, love & harmony Atte http://www.atte.dk

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Re: [chuck-users] Inter-shred communication
by Ollie Glass 28 Nov '05

28 Nov '05

> Hi Ollie, > > All is good except that you probably want to make a static TheEvent > somewhere and use that one instance among the shreds. slightly > modified code below, with a new class 'The' to hold the global/ > static object(s). Perfect, thank you Ge. Ollie

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