Pd-list April 2010

pd-list@lists.iem.at

143 participants
284 discussions

table abstractions
by Matt Barber 30 Apr '10

30 Apr '10

Hello list, For a while there had been talk about starting a vanilla-only table-abstraction collection in the spirit of list-abs and the iem_tab objects. This could be useful both for manipulation of or calculations using table data and for populating tables with desired data (in the manner of the csound GEN routines). I'd love to start it, but I don't know if I have enough Pd cred yet to be in charge of it. There are a few problems I'd like input on: 1) Naming -- would it be worth it to have different prefixes for objects which manipulated data, e.g. [table-reverse], and objects which populated tables, e.g. [tabwrite-blackman]? 2) Input-Output -- for the ones which manipulate data, should that generally happen in place unless a destination table is provided -- [table-qsort foo] sorts table values in table named foo and writes results back to foo, while [table-qsort foo bar] would sort foo's values and write them into bar? 3) In general I'm assuming that the objects which populate tables should simply write to a table, not internally provide the table to be written to. For instance, I'm thinking a [tabwrite-hann foo] which writes a hann window into foo would be more useful than a [table-hann foo] which internally instantiated a table called foo AND wrote a hann window to it, and responded to messages like "resize" with a larger or smaller hann window (I think accessing the table from without might be too buggy for this to be worth it). 4) Interpolation -- I'm also assuming that anything which would write a table that would usually be read by [tabread4~] or [tabosc4~] should write the guard points for proper interpolation by default. I've attached an example [tabwrite-chebyshev], which writes a weighted sum of chebyshev polynomials of the first kind to a table, probably for use with waveshaping, as an example of what I'm thinking of, and of a few options members of such a collection might have. (Incidentally, it might be a good idea to abbreviate this particular one to "cheb" or "cheby" due to the many transliterations, or even something like "chebsum" to name it like the sinesum or cosinesum array methods.) My thought is that many of us have already been making and using abstractions like these, and I think it would be worth it to collect them in a vanilla library for general use. Matt

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connecting a samphold and a phasor together
by Benoît Fortier 29 Apr '10

29 Apr '10

First time on this mailing list, so hello everyone! I started using pd a couple of month ago and I'm completely addicted. Ok I have a simple problem for which I'm looking for the most elegant solution. I need a phasor (in a looping sampler) which frequency can be changed only at the beginning of it's period (when it drops to zero). That's usually the kind of problem a samphold can handle very well but when I connect a phasor and a samphold directly together I get a "dsp loop detected (some tilde objects not scheduled)" error. One solution could be to "pipe" the new frequency to the phasor with a delay calculated from the previous frequency but I have the feeling there must be a more elegant solution to this problem. Anyone got a suggestion? There is a thread in the archive that is adressing a dsp loop issue but the solution proposed dosen't seem to be adapted to my specific problem. Thank you Benef

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bit crusher abstraction
by David Schaffer 29 Apr '10

29 Apr '10

Hi everybody, I'd like to know if there's a bit crusher/ lo-fi/ sonic destructor abs. somewhere out there. I'd like to take a look inside to see how it works, just out of curiosity. Thanks D.S http://www.flickr.com/photos/schafferdavid/ http://audioblog.arteradio.com/David_Schaffer/ _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969

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FLOSS translation into French
by Pierre Massat 29 Apr '10

29 Apr '10

Hi all, I sorry to bring this up again, there was a discution a while ago about translating the FLOSS manual in French. I m not sure how to go about doing this. Can translate anything i want? Can i start with topic, or is there a priority rank? And how do i submit the translated pages? I know that i got a reply explaining all this last time, but i just can't find it... Cheers! Pierre

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London Patching Circle - Tuesday 4th May
by Ryan Jordan 29 Apr '10

29 Apr '10

London Pure Data patching circle. -- -- Link up with other Pd-ers in meatspace to swap techniques. Tuesday 4th May 7pm - 10pm A10Lab Area 10 Project Space Peckham Hill Street SE15 5JT Buses 12, 36, 37, 63, 78, 436, 345, 177, 312, 343 Train: Peckham Rye Station Free and Open to all! Feel free to list topics you'd like to go through, cool things you want to share, etc. If you could email ryan-jordan{at}hotmail{dot}co{dot}uk so I know who's coming. http://puredata.info/community/LondonPatchingCircle http://a10lab.info/ Forward to whoever you think may be interested. http://ryanjordan.org/ http://a10lab.info/ _________________________________________________________________ http://clk.atdmt.com/UKM/go/197222280/direct/01/ Do you have a story that started on Hotmail? Tell us now

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Re: [PD] FLOSS translation into French
by Derek Holzer 29 Apr '10

29 Apr '10

I'm happy that there is so much attention on the FLOSS Manual. Pure Data has been long in need of documentation for human beings. However, it needs a lot of writing and proofing before it will be ready for translation. I may try to spend a little time in July working on it. Get in touch with me directly if you're interested in helping and I can let you know the state of affairs. Best! Derek On 4/29/10 5:52 AM, Pierre Massat wrote: > I personnaly read the FLOSS manual first. I think it should be > translated first, because it's well referenced in google, and it's > also concise but quite comprehensive for beginners. > This is just my opinion. Should we vote? -- ::: derek holzer ::: http://macumbista.net ::: ---Oblique Strategy # 118: "Make what's perfect more human"

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Re: [PD] Problems Following Floss "Generating Waveforms" Article
by Alex Lucas 29 Apr '10

29 Apr '10

Hi Guy's, Thanks very much for your help on this. I've uploaded a screenshot of the patch here http://tinypic.com/r/mmcy89/5 however there doesn't seem to be any visible clipping on the table. The audible clipping was present across the frequency range but changing the multiplication on the phasor~ to 2048 has solved the problem. Thanks again, Alex

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portaudio and asio windowz
by Marco Donnarumma 29 Apr '10

29 Apr '10

hello, I just got a saffire pro 40. I'm testing it on windows atm 'cause FFADO driver works but it's still unstable on linux. In Pd output/input 1-2 work properly, but there is no way I can get the others working. I tried both MMIO (also with "multiple device"), and ASIO. No luck. Selecting ASIO I have two options: - (0)SaffireAudio: works fine only with 2 I/O selected. When I change the I/O to anything more than 2 sound stops working. - (1)ASIO Saffire: no sound at all. It looks like a problem with Portaudio/Pd.. All I/O work properly with AudioMulch, Wavelab, and Audition. Any hint? thanks in advance.. I have to prepare two installations for Mid May... :( p.s. Also tried to put the same number of I/O as suggested by Derek here http://www.mail-archive.com/pd-list@iem.at/msg20738.html and found this other thread http://www.mail-archive.com/pd-list@iem.at/msg27160.html but in that case the problem was not solved. -- Marco Donnarumma aka TheSAD Independent New Media Arts Professional, Performer, Teacher - Edinburgh, UK PORTFOLIO: http://marcodonnarumma.com LAB: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net EVENT: http://www.liveperformersmeeting.net

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metro default arg
by colet.patrice＠free.fr 29 Apr '10

29 Apr '10

what about setting metro default argument to same as delay? just for awkward windows users like me $ diff -uw x_time.c.old x_time.c --- x_time.c.old 2010-04-28 11:16:06 +0000 +++ x_time.c 2010-04-28 11:16:30 +0000 @@ -107,7 +107,7 @@ static void metro_ft1(t_metro *x, t_floatarg g) { - if (g < 1) g = 1; + if (g < 1) g = 20; x->x_deltime = g; }

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Re: [PD] gem pipe? (fwd)
by Mathieu Bouchard 29 Apr '10

29 Apr '10

---------- Forwarded message ---------- Date: Wed, 28 Apr 2010 15:08:34 -0400 (EDT) From: Mathieu Bouchard <mbouchard(a)videographe.qc.ca> To: Andrew Faraday <jbturgid(a)hotmail.com> Subject: RE: [PD] gem pipe? On Wed, 28 Apr 2010, Andrew Faraday wrote: > Well, I always meant the [pipe] object. in this context. I understand the > connections betwen objects are usually known as wires. Well, that's a problem already. They are known as connections, lines, cords, cables, wires and more. So why not pipe as well ! BTW, is there any reason why you are replying in private ? > My issue is that I've wound up spending quite some time putting [pipe] > objects between different parameters of gem chains in order for one to change > a set number of milliseconds after another. I basically want a whole chain > parameter pipe, do you want what is called "display lists" ?... OpenGL allows you to pre-record command sequences for later playback. This is how you can get around the usual order of commands in OpenGL. I think that there's a way to do that in GEM. > also I'm not sure about 'the cracks between the frames', This means that if you run GL commands after the end of a frame rendering, and before the beginning of the next one, it will have no effect. To be rendered correctly, you have to let the [gemhead] be triggered normally by [gemwin], or you have to turn-off the clearing of the buffer between frames (i don't recall the name for that). _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard, Montréal, Québec. téléphone: +1.514.383.3801

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Pd-list April 2010