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chuck linux-alsa in Ubuntu 11.04
by Alex French 31 May '11

31 May '11

Hi all, I've become quite interested in procedural/fully synthesized audio for game development, and I've tried out a lot of different tools, including cmus, supercollider, puredata, and chuck. I really like chuck, because it seems fairly lightweight and simple compared to the others. The only problem is that I can't get it to work in Ubuntu using alsa. It works with jack, which is fine for me, but I don't want my users to have to install and deal with jack just to play my game. So here's my situation... I'm running 32 bit Ubuntu 11.04. I have onboard sound on my motherboard, through the nVidia MCP55 chipset: 00:0f.1 Audio device: nVidia Corporation MCP55 High Definition Audio (rev a2) Unfortunately, that device crapped out on me a year or so ago, so I replaced it with this: 02:09.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10) ...which is a Diamond XS51 PCI audio card. I also have this, courtesy of my video card: 01:00.1 Audio device: ATI Technologies Inc Barts HDMI Audio [Radeon HD 6800 Series] That makes for a fairly complex setup. Here's what chuck sees: $ ./chuck --probe [chuck]: found 7 device(s) ... [chuck]: ------( chuck -- dac1 )--------------- [chuck]: device name = "hw:NVidia,0" [chuck]: probe [success] ... [chuck]: # output channels = 8 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = YES [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: 32-bit int [chuck]: supported sample rates: [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 96000 Hz [chuck]: 192000 Hz [chuck]: [chuck]: ------( chuck -- dac2 )--------------- [chuck]: device name = "hw:NVidia,1" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: 32-bit int [chuck]: supported sample rates: [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 88200 Hz [chuck]: 96000 Hz [chuck]: 192000 Hz [chuck]: [chuck]: ------( chuck -- dac3 )--------------- [chuck]: device name = "hw:NVidia,2" [chuck]: probe [success] ... [chuck]: # output channels = 0 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 0 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: 32-bit int [chuck]: supported sample rates: [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 96000 Hz [chuck]: 192000 Hz [chuck]: [chuck]: ------( chuck -- dac4 )--------------- [chuck]: device name = "hw:CMI8738,0" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 5512 Hz [chuck]: 8000 Hz [chuck]: 11025 Hz [chuck]: 16000 Hz [chuck]: 22050 Hz [chuck]: 32000 Hz [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 88200 Hz [chuck]: 96000 Hz [chuck]: [chuck]: ------( chuck -- dac5 )--------------- [chuck]: device name = "hw:CMI8738,1" [chuck]: probe [success] ... [chuck]: # output channels = 6 [chuck]: # input channels = 0 [chuck]: # duplex Channels = 0 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 5512 Hz [chuck]: 8000 Hz [chuck]: 11025 Hz [chuck]: 16000 Hz [chuck]: 22050 Hz [chuck]: 32000 Hz [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 88200 Hz [chuck]: 96000 Hz [chuck]: [chuck]: ------( chuck -- dac6 )--------------- [chuck]: device name = "hw:CMI8738,2" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: 32-bit int [chuck]: supported sample rates: [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: 88200 Hz [chuck]: 96000 Hz [chuck]: [chuck]: ------( chuck -- dac7 )--------------- [chuck]: device name = "hw:Generic,3" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 0 [chuck]: # duplex Channels = 0 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 32000 Hz [chuck]: 44100 Hz [chuck]: 48000 Hz [chuck]: [chuck]: ------( chuck -- 2 MIDI inputs )------ [chuck]: [0] : "Midi Through Port-0" [chuck]: [1] : "C-Media CMI8738 MIDI" [chuck]: [chuck]: ------( chuck -- 4 MIDI outputs )----- [chuck]: [0] : "Midi Through Port-0" [chuck]: [1] : "C-Media CMI8738 MIDI" [chuck]: [2] : "OPL3 FM Port" [chuck]: [3] : "qjackctl" [chuck]: I've tried using dacs 4-6 with pasuspender to suppress pulseaudio, but nothing seems to work. The same thing happens without pasuspender; I don't know if it's actually required, but it's something I tried. Anyway, in an attempt to get some more information, I increased the log verbosity: $ pasuspender -- ./chuck --verbose5 --dac5 moe.ck **snip** [chuck]:(2:SYSTEM): | sample rate: 48000 [chuck]:(2:SYSTEM): | buffer size: 512 [chuck]:(2:SYSTEM): | num buffers: 8 [chuck]:(2:SYSTEM): | devices adc: 0 dac: 5 (default 0) [chuck]:(2:SYSTEM): | adaptive block processing: 0 [chuck]:(2:SYSTEM): | channels in: 2 out: 2 **snip** [chuck]:(3:SEVERE): starting real-time audio... [chuck]:(2:SYSTEM): RtApiAlsa: callback thread error... [chuck]:(5:INFORM): | (RtApiAlsa: audio read error for device (hw:NVidia,0): Input/output error.) [chuck]:(5:INFORM): | closing thread... What's going on here? I asked for the CMI8738, but I'm getting I/O errors from the nvidia device. At this point I'm completely lost. Help? -Alex

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Undocumented Features
by Jordan Orelli 31 May '11

31 May '11

What's the word on discussing and potentially documenting undocumented features? Occasionally I find it easier to just read the ChucK source than trying to find documentation for what I need, and I have noticed things that are undocumented. Their working state is questionable, but I have found at least one thing that is exceptionally convenient for me but remains unspoken of on the official documentation that appears to be stable: the Osc class. Internally it sits between UGen and the following classes on the inheritance tree: Phasor, SinOsc, TriOsc, SawOsc, PulseOsc, and SqrOsc. I find it useful for making collections of oscillators whose type I can change dynamically. I.e., in my current project, I have a two-dimensional array of Osc references that I can use to store a mixed collection of the aforementioned UGens. As an example, here's how I dynamically switch what base Osc object is being used, which would be much more verbose without the Osc class: fun void setPatch(string targetPatch, int column, int row) { if(!checkRange(column, row, "setPatch")) return; Osc s; // You can't use UGen here, because the UGen class has no freq property if(targetPatch == "SinOsc") { new SinOsc @=> s; } else if(targetPatch == "SqrOsc") { new SqrOsc @=> s; } else if(targetPatch == "SawOsc") { new SawOsc @=> s; } else if(targetPatch == "TriOsc") { new TriOsc @=> s; } else { cherr <= "Unrecognized targetPatch supplied in OscBank.setPatch:" <= targetPatch <= IO.newline(); } toneMap()[column][row] => s.freq; bank[column][row] =< gains[column][row]; s @=> bank[column][row] => gains[column][row]; } This seems to be a really general tool, since I'd wager that the supermajority of us go through ChucK 101 with little more than the SinOsc and Noise UGens. Where's the proper place to document my finding so that others can find it? Is there somewhere that this already happens? -Jordan

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[OT] a new email list (Live Group Computer Performance)
by Jascha Narveson 31 May '11

31 May '11

Hello, everybody - I'm forwarding this to the list on behalf of Charles Céleste Hutchins: ----- There is a new email list for discussion surrounding Live Group Computer Performance: http://groups.google.com/group/LiGroCoP We will be discussing issues about playing in and coding for LOrks, Laptop Ensembles, Laptop Bands and similar computer groups of three or more. ----- cheers, jascha

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Holodeck Phaser Practice
by Les Hall 27 May '11

27 May '11

I bet you didn't know that ChucK has a holodeck. Yep, an audio only holodeck with a real phaser target practice program. It works with any compatible phaser such as the Gyration Air Mouse Elite. If you have such a device, go to the following ChucK forum thread and get yourself a copy of the code. http://electro-music.com/forum/viewtopic.php?t=48028 Although slightly buggy, this code does work and I plan to do more with it, both fixing the wrap-around bug and adding lots of cool features. I'm open to suggestions on what else to add and what to refine, and if anyone could take a look at the if() statements in the mouse routine that wrap phaserTheta and phaserPhi to their angular limits, that would be greatly appreciated. Also note that the Gyration Air Mouse Elite has a healthy working range to it, so you can crank up your speakers and step out into the hallway or open floorspace so you have room to move around. People nearby will probably get a kick out of it also - tell them ChucK sent you. See you on the holodeck! Les

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ChucKchat Netlooping Instructions
by Les Hall 24 May '11

24 May '11

As requested, I have created a web page on electro-music.com that will help get you started netlooping with ChucKchat. Here it is: http://electro-music.com/article.php?t=47965 Les

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NetLooping Session
by Les Hall 23 May '11

23 May '11

Here is a forum thread containing a netlooping recording. It is funny: http://electro-music.com/forum/viewtopic.php?t=47889 Les

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ChucK Chat
by Les Hall 23 May '11

23 May '11

Hi everyone, I have a cool idea. Tonight I'm going to start on a ChucK Chat application. This will be a serverless application, so client only. Each program has a list of ip addresses of your pals in it. As you type, it sends out OSC messages that deliver the text to all of the pal clients. The program also displays everything received. The idea is to chat and also jam musically (add music later) - I just thought it would be cool to do a ChucK chat session program! :) Does anyone have any comments or suggestions regarding this concept? I'm coding it now, so please reply soon! Les

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chuckchat
by tempjayren＠gmail.com 22 May '11

22 May '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 i've read about this briefly though admit i don't understand much of anything that's being talked about. though i'd love to connect with other chucksters ooo. chuckster, is that a valid word? i like the sound of it. this sounds similar to what the ninjam application lets nonchuck users do, and doing this with a chuck theme would have to be just great. i need more info though. if someone can write me offlist and give me that info, i'd appreciate it. i'm hoping there's no binary i have to get as i'm in windows, all i've got is the chuck.exe, would have to be a precompiled binary as i don't have compiler tools. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJN2MHwAAoJEIaKvi7tbzRHmZQH/0JqGRHuwLFfW4NyFPa8ybGD aCF1azOaPcyEhpeEvo+LMxWKaLyryeviFeXLTH+BGrjQuo8n3lZrgz7/qh/R3P5o RxAMdqiqW073HfwFtUG0j/pD6yO6VWfRhWDqKGQ5SH4tH5TxV++zA5LfQh+/SgvG Mg2SFAeHNlX5c6KUWWGLy8HFfAK5QNSRmxNQ5l0O0APngvrrGs5v5FlTxMFcQz9D VPWeInHgQaf9BohatTWXKi5cFHKnbVdrxgXB9SX34RkzNWD/GUfyGlfFl9nwz5FE 81M9ek1q2nU7/ovQBNCULxxN7lAZkoU5m0ljOuJEhEGI3MXwd2M2ojxV91AMOJo= =Jy1r -----END PGP SIGNATURE-----

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Today's ChucKchat NetLooping Session
by Les Hall 20 May '11

20 May '11

For about two or three hours today, I did netlooping on radio.electro-music.com using ChucKchat. The results were quite positive. I announced it on facebook where many music friends hang out, and we got 10 listeners - half from electro-music chat regulars and half from facebook. That's just about how many we get for scheduled shows so it indicates at least some level of interest. I did vocals and music into the loop and explained lots of things about how it all works, plus joked around with the folks in chat. Then near the end, Blue_Hell installed his setup and remotely controlled my software from across the Atlantic ocean! He successfully did things like change tempo and gain and such, but quickly lost interest because, let's face it, a three-word command line interface is not very musically intuitive. So my next goal is to make it more fun by using the mouse and/or keyboard to control the music remotely. That should help a lot in terms of fun. Overall it was a big success for an impromptu event and we hope to have many more events like this. Yay \o/ Les

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Brain orchestra
by Hans Aberg 19 May '11

19 May '11

FYI, an orchestra controlling the sounds by brain waves. Hans http://news.bbc.co.uk/2/hi/technology/8020904.stm

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