Pd-list October 2017

pd-list@lists.iem.at

70 participants
100 discussions

Re: [PD] efficient approximation of trig functions for hi pass formula (was: could vanilla borrow iemlib's hi pass filter recipe?)
by Dan Wilcox 20 Dec '17

20 Dec '17

I think a core commenting sprint would be *very* helpful, specially to those of us (me) who would like help in understanding the black magic inside. -------- Dan Wilcox @danomatika <https://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/> > On Oct 19, 2016, at 12:57 PM, pd-list-request(a)lists.iem.at wrote: > > That is an important question. Pd code is full of clever tricks and > bit hacks for dsp efficiency. What is the origin of q8_rsqrt(), why > and how does it work? What about PD_BIGORSMALL() in m_pd.h? And the > mysterious UNITBIT32 number in d_osc.c? Ideally such code should be > commented not only to denote its function (if necessary) but also to > reference the origin so you may be able to find info.

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Review of expr 0.55 (released in 0.48) and a Pull Request
by Alexandre Torres Porres 17 Dec '17

17 Dec '17

Hi Shahrokh and Miller. I've sent this before, but now I'm sending again with a more explicit subject and also a Pull Request. I've tested the new expr (v0.55 released in pd 0.48) and I still have some remaining bugs to report. These are bugs I really think should be fixed, and some suggested feature requests. One of the bugs is plain simple, the fact that fexpr~ doesn't allow a float input in its left inlet. That doesn't seem intentional, by the way, because [expr~] allows it. Anyway, here's a simple Pull Request I created about it, see if it's cool: https://github.com/pure-data/pure-data/pull/219 cheers

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retrigger [tabread4~] sampler without clicks
by Federico Galland 17 Dec '17

17 Dec '17

Hi, I'm working on a granular sampler borrowing parts of the patch on pd-tutorial (http://www.pd-tutorial.com/english/ch03s07.html). Everything works smoothly except for one little annoying problem. If I fire the sample before the last one is through, sometimes I get a click at the beggining of the playback. This is happening on a percussive sound (rapid envelope attack) so I'm guessing it's got something to do with [tabread4~] failing to interpolate between whatever the last amplitude value was and the first wavetable value. This http://crca.ucsd.edu/~msp/techniques/latest/book-html/node63.html can probably be used to solve my problem, but I can't figure out how (or where in the patch) I should implement it. Any clues would be greatly appreciated. Thanks a lot, and have a good one. ps. I tried to comment the patch to make it understandable. It is still, however a work in progress. Let me know of any questions. -- Federico Galland <federicogalland(a)gmail.com>

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which pix_opencv to select in Deken?
by Peter P. 08 Nov '17

08 Nov '17

Hi list, I am wondering about the differences between the following two search results for "opencv" in Deken on Debian Linux: pix_opencv-v0.4-Ubuntu15.10-(Linux-amd64-64)-externals.tar.gz Uploaded by avilleret @ 2016-03-14 16:31:30 pix_opencv-v0.4-(Linux-amd64-64)-externals.tar.gz Uploaded by avilleret @ 2016-03-14 21:20:55 Furthermore, with either I can't arrive at loading the lib and creating its object. Loading with the path set and [declare -lib pix_openc] does not print a success message. The library seems to be present as file pix_opencv.l_ia64 in the respective folder. I am not familiar with .l_ia64 library files and thought it would be .pd_linux. The README.txt file within the pix_opencv mentions pix_opencv-overview.pd which seems to be missing. would be great to get it to run and learn what I am doing wrong! best/merci P

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[PD-announce] else 1.0 beta 5 released
by Alexandre Torres Porres 04 Nov '17

04 Nov '17

I did 4 updates this month because of a course I'm teaching, which ends now, so I'm gonna drop this for a while, sorry for polluting with so many updates. Anyway, it's up on deken already, and here are some details: https://github.com/porres/pd-else/releases cheers _______________________________________________ Pd-announce mailing list Pd-announce(a)lists.iem.at https://lists.puredata.info/listinfo/pd-announce

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Purr Data 2.4.1
by Jonathan Wilkes 03 Nov '17

03 Nov '17

Hi list, Purr Data 2.4.1 is out: https://github.com/jonwwilkes/purr-data/releases/tag/2.4.1 Please report bugs here: https://git.purrdata.net/jwilkes/purr-data/issues * update [expr] family to the same codebase as Pd Vanilla 0.48 * fix bug that prevented file path in [draw image] from working * fix regression opening Pd files in a running instance Best,Jonathan

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Re: [PD] GUI freeze
by Johnny Mauser 01 Nov '17

01 Nov '17

I have the same behaviour in Ubuntu 16.04 and pd 0.46 The only workarround i found was to construct the gui in another instance. Am 22.09.2017 3:14 nachm. schrieb "Roman Haefeli" <reduzent(a)gmail.com>: Hey all Apologies for a somewhat vague bug report about a hard to reproduce issues (yeah, everybody loves those). I tend to create instruments for netpd with lots of visual feeback (song position in sequencer, triggered notes, automated values, meters). Sometimes during sessions with rather many instruments, it happens what I (only half-correctly) call a GUI freeze. Sliders, number atoms, symbol atoms, radios etc. stop visually reflecting any change. They still do send new values through their outlet, but are not updated visually, neither when manually changed or when sending new values through inlet or send symbol. When it happens, it affects all GUI widgets of all patches the running Pd instance. It usually happens after an error is printed to the Pd console: (Tcl) INVALID COMMAND NAME: invalid command name ".x88d5c68.c" while executing ".x88d5c68.c delete curve8cc3d94" ("uplevel" body line 23) invoked from within "uplevel #0 $docmds" Interestingly, when I minimize a canvas and unminimize (or switch desktop away and back) it again, it all widgets display the current values, though live changes are still not updated. Also not all properties of the GUI widgets are affected. Label texts, label fonts, background, foreground and label colors, also cnv dimensions and similar things are still updated. Or in other words: Those aspects that work both ways (GUI -> pd and pd -> GUI) are affected, while the supplemental features of the widgets that can't be controlled by mouse (pd -> GUI only) are not affected. The situation persists until I restart Pd. That's again a vague statement, but I have the impression it got slightly worse when switching from 0.47 to 0.48. I'm not able to create a simple patch that triggers the GUI freeze. However, I have saved sessions that run reliably into this within minutes. Thanks for any thoughts on this. Roman _______________________________________________ Pd-list(a)lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/ listinfo/pd-list

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a threaded soundfiler
by Alexandre Torres Porres 31 Oct '17

31 Oct '17

hi, I was hoping to create an external like soundfiler, but that didn't cause audio drops if the audio is too big. any hints and ideas on where to start if you're clueless? thanks

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Re: [PD] Relase Plans For Fixing Pd 0.48-0 Bugs
by Alexandre Torres Porres 31 Oct '17

31 Oct '17

Hi, sorry to bug about it, but I'm really excited about the next fix release and wonder if there are any plans for a release any time soon. thanks Mon Aug 28 17:01:19 CEST 2017 Miller Puckette <msp(a)ucsd.edu>: > I'm leaving on a strenuous trip (BIFEM in Bendigo, Australia, then DAFX in > Edinburgh, Scotland) and back Sept. 10. I won't be able to upsh any > official releases till sometime that week. At that point I'll try at least > to fix the following bugs: jack support in macOS keyup problem in MacOS > deleting trailing backslash in message box crashes Pd TCL errors when > closing certain GOP sub-patches bug in line~ - will need back-compatibility > version control back compatibility for wrap~ bug fix (Some are already > fixed and just need merging and testing). I don't plan to add any features > - just fixes, hoping to get everything stable. cheers Miller

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anti-aliasing filtering (was Re: a slightly nicer saturator than tanh~)
by Alexandre Torres Porres 30 Oct '17

30 Oct '17

2017-10-28 13:01 GMT-02:00 cyrille henry <ch(a)chnry.net>: > I don't understand. > can you share your patch? > thanks > c > What don't you understand? Anyway, here's a patch. I was exaggerating, actually is not that 512 is still not good enough, it seems it is ok, but it's just an insane amount of oversampling to achieve a nice anti-aliasing filter, and it goes over 80% CPU load on a previous generation, top of the food chain, macbook pro. Here's a patch where you can test different oversampling factors. If you go to 64, for instance, seems still bad for what I hoped for. Anyway, I usually go to 16x, which seems like a good compromise. cheers

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Pd-list October 2017