Re: [PD] making puredata headphone-safe
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 2011-08-24 02:33, Chris McCormick wrote: On Tue, Aug 23, 2011 at 06:48:05PM -0400, Martin Peach wrote: An [osc~] multiplied by will sound louder but it won't actually be louder than an osc multiplied by one (the amplitude at the output will still be between 1 and -1). I think it actually depends on your sound card whether or not this is true with Pd. I might be mistaken but I am pretty sure some sound cards will let you output abs(x) 1. Hmmm actually this doesn't make sense to me if the driver is accepting a 16 bit signed int. Can someone confirm whether this is the case? finally someone! to clarify: imho, you should never! assume that [dac~] is equivalent to [clip~ -1 1] - [dac~] whether or not your output signal will be clipped to -1..+1 is entirely depending on your sound infrastructure (i'm mainly talking about software here; depending on whether you use portaudio, mmio, alsa, jack and whatnot, your signal might be converted to some fixed point format (mostly 16bit signed integers) or a floating point format just before it leaves Pd. in the former case, you will eventually experience clipping. in the latter case less so. after that, it is up to your sound infrastructure what to do with the signal, and it might well boost it or clip it or whatever, before it delivers to the hardware, which again might speak whatever format (e.g. 16bit unsigned int) that might impose clipping. finally, your signal might get clipped at a number of places will eventually get clipped (or distorted similarily) by your amplifiers and/or your speakers. if you do get clipping, then [osc~ 440] - [*~ 440] will usually sound more annoying (and louder) than a loud 440Hz tone, as you get plenty of harmonics. Incidentally, if I recall correctly, Miller told me that he uses a set of small, cheap speakers when doing experimental stuff so as to save ear damage. At least I think it was Miller. for what it is wort, we have a huge red button labeld panic that allows to mute all the 24 speakers in our CUBE, just in case your patch goes havoc and you have innocent audience in the room. fgmasdr IOhannes -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5UplEACgkQkX2Xpv6ydvRa1ACdEDPyWLRydZtLM+GmsekmEpht 80EAnRh+K4xDs8cxp8ZO/mzf3Hs5Z012 =JzW1 -END PGP SIGNATURE- smime.p7s Description: S/MIME Cryptographic Signature ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] making puredata headphone-safe
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 2011-08-24 07:32, Richie Cyngler wrote: I don't get why no one is talking about reducing the signal level before dac~? because we are talking about a safety net here. everything done before the [dac~], you can easily circumvent within the patch (consciously or - more likely and dangerous - unconsciously) while happily patching away, making such provisions void (and blasting your ears) fgmasdr IOhannes -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5UpxsACgkQkX2Xpv6ydvS6KgCgpjhEQHwOmHGSv6gCYz4az8ct 2QUAoLneNbeBGpH3ev8XRPZY7ZIUi7oP =NoMB -END PGP SIGNATURE- smime.p7s Description: S/MIME Cryptographic Signature ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] making puredata headphone-safe
On 08/23/2011 11:47 PM, Richie Cyngler wrote: (whatever kind of sound gen you like) | [*~ 0.2] | \ [dac~] i think you should put a clip -1 1 before the *~ 0.2. otherwise, if you connect something like osc~ *~ 1 for example, you would get some very loud drilling sound at the dac~ ,which should(!?) also clip at -1 1, but this might be too loud already... bis denn! martin ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Dynamic patching with audio - review
Hi, A new report of my researchs about audio dynamic patching techniques. The continuation of my previous reviews : http://abel.jerome.free.fr/pd/dynamic-patching/reviews/DynamicPatching_review-1.txt http://abel.jerome.free.fr/pd/dynamic-patching/reviews/DynamicPatching_review-2.txt === Pd-list archives === The issue has been discussed several times (IOhannes m zmoelnig) That's right. I've just seen that the pd dsp O/1 method was described in 2005 ! It's quite difficult to find those threads without the terms dsp tree or dsp graph or dsp chain. Indeed, I don't know anything about it. A list of the best search terms could help us (see below) and avoid those noise requests. We are trying here to make a review of all dynamic patching techniques to make it easier to understand and find the best solution for any project. It could be a page on the community website instead of the disheartening do not use dynamic patching (http://puredata.info/docs/tutorials/TipsAndTricks#how-to-avoid-audio-drop-outs). - Search engine usage When I search in the pd-list, the score show some posts where the search term are in the next or previous message links, not in the message body. How limit the search term to the body and not the links ? Futhermore, if I'm interested in one thread, it seems that if I choose to sort by thread, it's only the threads of a month. How group one thread on all months ? - Search terms audio drop-outs with pd dsp O; pd dsp 1 activate audio abstraction dynamic audio abstraction dynamic patching dynamic patching techniques update dsp-tree update dsp-graphofxPd - Threads about audio dynamic abstraction in pd-list - [PD] strange behavior upon loading dsp abstraction http://lists.puredata.info/pipermail/pd-list/2004-12/thread.html#24337 - [PD] no dsp-chain update after dynamic abstraction-creation http://lists.puredata.info/pipermail/pd-list/2005-06/028923.html - [PD] slowly load a pd-patches/abs without dropouts http://lists.puredata.info/pipermail/pd-list/2007-01/046243.html - [PD] this is crazy http://lists.puredata.info/pipermail/pd-list/2008-01/059244.html - [PD] API for manipulating a patch in real time http://lists.puredata.info/pipermail/pd-list/2008-12/066723.html - [PD] Dynamically created signal object bug http://lists.puredata.info/pipermail/pd-list/2009-02/068246.html - [PD] abstraction creation audio engine start http://lists.puredata.info/pipermail/pd-list/2009-04/069849.html === Dynamic creation of audio abstractions === - Methods 1 - DSP 0/1 2 - Add/clear an audio object (subpatch) 3 - Add/cut any object (subpatch) See : http://abel.jerome.free.fr/pd/dynamicPatching/patchs/dyn-audio-abstraction/ This methods work with any abstraction. - DSP 0/1 method - explanations From IOhannes m zmoelnig : You shouldn't dynamically create abstractions while dsp is running, as it slows down significantly. If dsp is on, and you dynamically create 10 objects in one go (in zero logical time), then the dsp graph will be re-calculated 10 times. If you turn dsp off, then dynamically create 10 objects as before, then no dsp graph will be evaluated until you turn dsp on again, summing up to exactly 1 time. Furthermore, it guarantees that the entire DSP graph is calculated and not only parts of it (because of buggy implementations) Thanks a lot for those explanations. It's clear enough to see why choose these method even if internal processes in the DSP graph are still incomprehensibles. - DSP 0/1 method - Some questions --- With one audio abstraction. If we create just one audio abstraction at one time. Is it still the best solution or is it the same than other methods ? --- Audio clics. From me: But audio clics may occur for all sounds, not just for the new one, right ? From IOhannes: no, this is wrong. (at least not, if you computer is fast enough to calculate the DSP-graph within the buffertime). I don't understand how you can not heard clics with it. With my system, audio clics occur... Wrong settings ? Do I need a recent computer ? In fact, a clic is heard the first time with Jack/Alsa and always with Alsa and Asio4all. But in a dynamic patching case, what's this first time ? In the dynamic patch example, clics occurs even if I use Jack/Alsa. See : http://abel.jerome.free.fr/pd/dynamic-patching/patchs/cpu-on-off/screenshots/cpu-on-off-audio-clics.png http://abel.jerome.free.fr/pd/dynamic-patching/patchs/dyn-audio-abstraction/screenshots/dyn-activate-audio-abstractions.png --- Time response depends on audio system If I want a
Re: [PD] #store and getting pixel data from a movie file
On Tue, 23 Aug 2011, ALAN BROOKER wrote: I hope to ask for some tips regarding obtaining values from a loaded image/movie file by using gridflow ? #store gets can get rgb values from a specified pixel position You can pass multiple pixel positions at once to #store and it's much faster than getting pixels one by one. Those multiple pixel positions can in turn be organised in rows and columns so that you can make a new image by picking 10 pixels in a single step, for example. but any advice on getting the whole dimensions at once What does that mean ? (or any other techniques in getting gridflow to output values from a movie file such as movement, luminosity or anything)? some kind of luminosity is what you get when you convert to greyscale. You may use [#rgb_to_greyscale]. Movement can be a lot of different things. The easiest one is to subtract each frame with the previous one. Then you can know the change of luminosity from one image to the other, or the change of each channel. You do that using [t a a] and [# -] (plain diff) or [# sq-] (squared diff) or [# abs-] (absolute diff). You can also identify regions or compute mean positions of things and then look at the position differences. Sometimes I did that using [#moment] and then [t a a] and [# -]. Note that often the same tools work on different kinds of data (pixel colours vs pixel positions). This is a feature of GridFlow which is not found in other image-processors of Pd (GEM/PDP/etc). There are also algorithms to make a map of all translations (move) of pixels in the picture, but they have not incorporated in GridFlow. ...also is there support for mp4 in gridflow? the file format being the same as mov (I think?) GF uses Quicktime.framework (by Apple) on OSX, and libquicktime (by H.W. Plaum) on Linux and now also on OSX. Nearly all video file format support rests upon that. GF also can run libmpeg3, but that's a MPEG1/MPEG2 decoder without plugins. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
On Tue, 23 Aug 2011, Stephen Lavelle wrote: 1 - Inlets/outlets too small for me to accurately click on (touchpad) - checking on pd-dev, they can be visually reskinned, but their actual clickable size can't be changed. [ so I guess this one has been responded to, but might as well repeat it ] I once had written a zoom feature for pd, but it used a much different framework, so, it can't be ported to regular branches of pd (vanilla, extended, L2ork). However, it would be possible to make one using a wrapper around TkCanvas objects, so that they pretend being in one set of coordinates while being in another set. It's not a small task. If I were to do it, I'd use the poe.tcl framework, and I'd start from the unfinished tkzinc wrapper that you both can find in the DesireData distribution, and I'd look again at what «def Canvas item» does in DesireData. There are other ways, but that example gives you the tricks you need to know. 4 - is there a shortcut for deleting connections? something like ctrl+click would save me a lot of time. it's click,delete instead. 5 - is there a way to type numbers directly into a number box? clicking+dragging, or pumping them in via a message, doesn't feel good to me. click,digits,return. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
On Tue, 23 Aug 2011, Stephen Lavelle wrote: 4 - is there a shortcut for deleting connections? something like ctrl+click would save me a lot of time. BTW, if you select a set of objects, then cut it, then paste it, copies of the objects will reappear where the originals were, but they will be fully disconnected from the part of the patch that was not cut. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] making puredata headphone-safe
On Tue, 23 Aug 2011, Jonathan Wilkes wrote: Hm... I'm not sure I understand the danger. Isn't this: [noise~] | [*~ 99] | [dac~] an implicit version of: [noise~] | [*~ 99] | [clip~ -1 1] | [dac~] ? Yes. Thus it makes square waves. Their power is : (integral of (±1)² on [a;b]) / abs(a-b) which equals 1. Sine waves, instead, have this power : (integral of (sin t)² on [a;b]) / abs(a-b) which is ½ on average. There are further differences due to which frequencies are involved. Power in freqs around 1 kHz is more hearable, and power in freqs above that might be less hearable but still more painful, etc. But I don't know data about pain, just about hearability. [noise~] and high-pitched [osc~] have more hearable power than low-pitched [osc~]. Also, heavily-clipped signals have higher-pitched power, which usually means more hearable power. a [osc~ 100], when very clipped, will have power at 100 Hz, 300 Hz (nine times less), 500 Hz (twenty times less than 100 Hz), 700 Hz (49 times less than 100 Hz), etc., following the same pattern. combinations of several [osc~] with one clipper will have many more harmonics than that. you may think of [noise~] is somehow similar to an average of a silly number of [osc~] together, which cover the whole spectrum. any clipping of them will also cover the whole spectrum, but differently. I didn't read those articles, but they are on those topics : loudness : http://en.wikipedia.org/wiki/A-weighting clipping : http://en.wikipedia.org/wiki/Distortion#Harmonic_distortion ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Headphones question on pd list
On Wed, 24 Aug 2011, Jonathan Wilkes wrote (outside of pd-list): If I do this, can't I be fairly certain that I won't get a sound with greater perceived volume than the clipped [noise~]--[*~ 99] that I started with? [...] I'm just talking about things that could potentially cause ear damage. a harsh-clipped [noise~]-[*~ n] is probably close to the highest loudness you can get, even for not-so-high values of n. However, if you want to find the loudest, you'd have to start from the dBA loudness curve, and try to solve an equation involving a bunch of samples that can range from -1 to +1... at 44100 Hz over 1 second, that'd be 44100 variables, for example, though a lot less variables could be enough to get an idea. It doesn't look like an easy problem to me, but I haven't tried. And then, the loudness curve, the pain curve and the damage curve are three different things. I don't even know whether the latter two have been computed. My only real experience with the loudness curve(s) is from writing Alexandre T Porres' externals (for what he presented in Weimar). I haven't studied the topic much more than that. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Headphones question on pd list
On Wed, Aug 24, 2011 at 2:15 PM, Mathieu Bouchard ma...@artengine.cawrote: On Wed, 24 Aug 2011, Jonathan Wilkes wrote (outside of pd-list): If I do this, can't I be fairly certain that I won't get a sound with greater perceived volume than the clipped [noise~]--[*~ 99] that I started with? [...] I'm just talking about things that could potentially cause ear damage. a harsh-clipped [noise~]-[*~ n] is probably close to the highest loudness you can get, even for not-so-high values of n. However, if you want to find the loudest, you'd have to start from the dBA loudness curve, and try to solve an equation involving a bunch of samples that can range from -1 to +1... at 44100 Hz over 1 second, that'd be 44100 variables, for example, though a lot less variables could be enough to get an idea. It doesn't look like an easy problem to me, but I haven't tried. And then, the loudness curve, the pain curve and the damage curve are three different things. I don't even know whether the latter two have been computed. My only real experience with the loudness curve(s) is from writing Alexandre T Porres' externals (for what he presented in Weimar). I haven't studied the topic much more than that. Maybe the equal loudness curves aren't as important as the peaks in the loudspeaker transfer function. Gotta add that to the analysis, too, but you'll never know what those are like unless you actually have them and measure it. I think the math makes sense: if a sequence of samples has only -1,+1 as values, then the intensity must be maximized--only the frequency spectrum has to be known. We have by isometric property of the Fourier tranform that the total energy in the frequency domain matches the energy in the time domain. So, it's only a matter of distribution. So, if we made a simple alternating sequence +1,-1,... then only the Nyquist frequency has any energy, but because most speakers (and ears) will weakly respond at this frequency, it's not very loud. Same goes for a repeating sequence, +1,+1,... or -1,-1,... for which no response is expected. The next thing to notice is that you can't produce a single frequency with some signal that is only distributed as -1 or +1 on each sample. So, it's no good just finding the peak of the loudspeaker + loudness curves either, we need big bands of frequencies that respond loudly. Chuck ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Gem VJ Tutorial patches
Hey I am soliciting examples for entry level GEM patches that work on linux/windows and OSX that show how to mix a video or react to sound. I recall a set of them called Begenswelder? That had a real good example for a sound reactive GEM patch but I cannot find it in my files, Please refresh my memory and as I asked anyone who has a simple patch(s) for understanding GEM or Vjing that works cross platform would be greatly appreciated. I have a few but I am trying to expand my cross platform examples. Thanks in advance pp ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem VJ Tutorial patches
Hey, I use PD/GEM a lot for VJing using a version of this patch http://puredata.hurleur.com/viewtopic.php?pid=25492 It's definitely not a beginner's patch... One note about this patch: It only really plays videos, it doesn't do anything generative. Ant On 24 August 2011 21:07, Pagano, Patrick p...@digitalworlds.ufl.edu wrote: Hey I am soliciting examples for entry level GEM patches that work on linux/windows and OSX that show how to mix a video or react to sound. I recall a set of them called Begenswelder? That had a real good example for a sound reactive GEM patch but I cannot find it in my files, Please refresh my memory and as I asked anyone who has a simple patch(s) for understanding GEM or Vjing that works cross platform would be greatly appreciated. I have a few but I am trying to expand my cross platform examples. Thanks in advance pp ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- 07875 006 245 anto...@hellocatfood.com http://www.hellocatfood.com ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
Looks like you already implemented a lot of the features in DD that I've been thinking about: * decent zoom capability * customizable fonts * balloon tips (although I hate balloons and used a Firefox-style notification area which can also be accessed by the user) * ttk::notebook in a centralized Preferences window * canvas/wire/box/etc. colors * snapping to grid * editmode crosshairs Questions: * for customizable fonts, why did you let the user specify the size? If you just have a hardcoded box height and character width (for, say, DejaVu Sans Mono) and automatically size any custom font to fit those specs, then you can guarantee that the graphical diagram will be pixel exact across platforms, with the only variable being the _exact_ font size. (And since the font metrics are the only thing that cannot be guaranteed to be the same across platforms, then it should be fitted to the boxes, and not the other way around.) Granted you'd have extra space at the right side of the box when variable-width fonts are used, but that's a small aesthetic price to pay for guaranteed vertical wire connections on ancillary inlets. * what's the current status of Desire Data? There are a great deal of features that would be good to port to (any flavor of) 0.43, but I'm not sure how the work of porting stacks up against the work of just updating/bugfixing DD. * has anyone used tkzinc? On the one hand, all the new feature requests I've seen for future versions of tk canvas have the caveat that they are already implemented in tkzinc, (item grouping, transparency, full text rotation, etc.) but it seems like an unmaintained library at this point. *** Since I now have a copy of DD compiled, might as well try out the keyboard patching magic... :) -Jonathan From: Mathieu Bouchard ma...@artengine.ca To: Stephen Lavelle analy...@gmail.com Cc: pd-list@iem.at Sent: Wednesday, August 24, 2011 1:22 PM Subject: Re: [PD] notes/questions from a beginner On Tue, 23 Aug 2011, Stephen Lavelle wrote: 1 - Inlets/outlets too small for me to accurately click on (touchpad) - checking on pd-dev, they can be visually reskinned, but their actual clickable size can't be changed. [ so I guess this one has been responded to, but might as well repeat it ] I once had written a zoom feature for pd, but it used a much different framework, so, it can't be ported to regular branches of pd (vanilla, extended, L2ork). However, it would be possible to make one using a wrapper around TkCanvas objects, so that they pretend being in one set of coordinates while being in another set. It's not a small task. If I were to do it, I'd use the poe.tcl framework, and I'd start from the unfinished tkzinc wrapper that you both can find in the DesireData distribution, and I'd look again at what «def Canvas item» does in DesireData. There are other ways, but that example gives you the tricks you need to know. 4 - is there a shortcut for deleting connections? something like ctrl+click would save me a lot of time. it's click,delete instead. 5 - is there a way to type numbers directly into a number box? clicking+dragging, or pumping them in via a message, doesn't feel good to me. click,digits,return. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem VJ Tutorial patches
Hey Ant, I checked out your patch but I couldn't get it to open any video files. I tried .avi, .mov and .mpg on osX. thanks On Thu, Aug 25, 2011 at 6:25 AM, Antonio Roberts anto...@hellocatfood.comwrote: Hey, I use PD/GEM a lot for VJing using a version of this patch http://puredata.hurleur.com/viewtopic.php?pid=25492 It's definitely not a beginner's patch... One note about this patch: It only really plays videos, it doesn't do anything generative. Ant On 24 August 2011 21:07, Pagano, Patrick p...@digitalworlds.ufl.edu wrote: Hey I am soliciting examples for entry level GEM patches that work on linux/windows and OSX that show how to mix a video or react to sound. I recall a set of them called Begenswelder? That had a real good example for a sound reactive GEM patch but I cannot find it in my files, Please refresh my memory and as I asked anyone who has a simple patch(s) for understanding GEM or Vjing that works cross platform would be greatly appreciated. I have a few but I am trying to expand my cross platform examples. Thanks in advance pp ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- 07875 006 245 anto...@hellocatfood.com http://www.hellocatfood.com ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- Richie ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Headphones question on pd list
Without knowing anything in advance about the speakers being used, is there a way to construct some kind of [aural-faxbomb~] that outputs in the -1 to 1 range which could be used generally to at least get in the ballpark of what you want the maximum level of perceived loudness to be when wearing headphones? Maybe another way to ask: can you construct an example patch with output that is louder than [noise~]--[*~ max_float_value]--[clip~ -1 1]--[dac~]? -Jonathan From: Charles Henry czhe...@gmail.com To: Mathieu Bouchard ma...@artengine.ca; pd-list@iem.at Sent: Wednesday, August 24, 2011 4:09 PM Subject: Re: [PD] Headphones question on pd list On Wed, Aug 24, 2011 at 2:15 PM, Mathieu Bouchard ma...@artengine.ca wrote: On Wed, 24 Aug 2011, Jonathan Wilkes wrote (outside of pd-list): If I do this, can't I be fairly certain that I won't get a sound with greater perceived volume than the clipped [noise~]--[*~ 99] that I started with? [...] I'm just talking about things that could potentially cause ear damage. a harsh-clipped [noise~]-[*~ n] is probably close to the highest loudness you can get, even for not-so-high values of n. However, if you want to find the loudest, you'd have to start from the dBA loudness curve, and try to solve an equation involving a bunch of samples that can range from -1 to +1... at 44100 Hz over 1 second, that'd be 44100 variables, for example, though a lot less variables could be enough to get an idea. It doesn't look like an easy problem to me, but I haven't tried. And then, the loudness curve, the pain curve and the damage curve are three different things. I don't even know whether the latter two have been computed. My only real experience with the loudness curve(s) is from writing Alexandre T Porres' externals (for what he presented in Weimar). I haven't studied the topic much more than that. Maybe the equal loudness curves aren't as important as the peaks in the loudspeaker transfer function. Gotta add that to the analysis, too, but you'll never know what those are like unless you actually have them and measure it. I think the math makes sense: if a sequence of samples has only -1,+1 as values, then the intensity must be maximized--only the frequency spectrum has to be known. We have by isometric property of the Fourier tranform that the total energy in the frequency domain matches the energy in the time domain. So, it's only a matter of distribution. So, if we made a simple alternating sequence +1,-1,... then only the Nyquist frequency has any energy, but because most speakers (and ears) will weakly respond at this frequency, it's not very loud. Same goes for a repeating sequence, +1,+1,... or -1,-1,... for which no response is expected. The next thing to notice is that you can't produce a single frequency with some signal that is only distributed as -1 or +1 on each sample. So, it's no good just finding the peak of the loudspeaker + loudness curves either, we need big bands of frequencies that respond loudly. Chuck ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
On Wed, Aug 24, 2011 at 23:10, Jonathan Wilkes jancs...@yahoo.com wrote: [...] * has anyone used tkzinc? On the one hand, all the new feature requests I've seen for future versions of tk canvas have the caveat that they are already implemented in tkzinc, (item grouping, transparency, full text rotation, etc.) but it seems like an unmaintained library at this point. It does seem unmaintained but to what extent is it unfinished/buggy? Andras ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
Not sure yet-- I tried looking at http://bugzilla.tkzinc.org but it timed out. The screenshots look neat. I suppose I could give it a test drive. From http://www.tkzinc.org/tkzinc/pmwiki.php?n=Main.Download: Tkzinc is available for Unix, Windows and Mac OS X platforms under the LGPL license. The latest stable version is 3.3.6+ (November, 2009). -Jonathan From: András Murányi muran...@gmail.com To: pd-list pd-list@iem.at Sent: Wednesday, August 24, 2011 6:56 PM Subject: Re: [PD] notes/questions from a beginner On Wed, Aug 24, 2011 at 23:10, Jonathan Wilkes jancs...@yahoo.com wrote: [...] * has anyone used tkzinc? On the one hand, all the new feature requests I've seen for future versions of tk canvas have the caveat that they are already implemented in tkzinc, (item grouping, transparency, full text rotation, etc.) but it seems like an unmaintained library at this point. It does seem unmaintained but to what extent is it unfinished/buggy? Andras ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] notes/questions from a beginner
Hm... tried demos/zinc-widget, and got a crash with demo #2 under Use of open GL when I tried to zoom in on the logo. -Jonathan From: Jonathan Wilkes jancs...@yahoo.com To: András Murányi muran...@gmail.com; pd-list pd-list@iem.at Sent: Wednesday, August 24, 2011 7:13 PM Subject: Re: [PD] notes/questions from a beginner Not sure yet-- I tried looking at http://bugzilla.tkzinc.org but it timed out. The screenshots look neat. I suppose I could give it a test drive. From http://www.tkzinc.org/tkzinc/pmwiki.php?n=Main.Download: Tkzinc is available for Unix, Windows and Mac OS X platforms under the LGPL license. The latest stable version is 3.3.6+ (November, 2009). -Jonathan From: András Murányi muran...@gmail.com To: pd-list pd-list@iem.at Sent: Wednesday, August 24, 2011 6:56 PM Subject: Re: [PD] notes/questions from a beginner On Wed, Aug 24, 2011 at 23:10, Jonathan Wilkes jancs...@yahoo.com wrote: [...] * has anyone used tkzinc? On the one hand, all the new feature requests I've seen for future versions of tk canvas have the caveat that they are already implemented in tkzinc, (item grouping, transparency, full text rotation, etc.) but it seems like an unmaintained library at this point. It does seem unmaintained but to what extent is it unfinished/buggy? Andras ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] multichannel instalation
I haven't been able to get the Sapphire to output more than two channels through Pd (though it is supposed to be capable of 8). don't know this card but have you set the number of output channels to 4? I have tried making a multichannel patch, for eg [dac~ 1 2 3 4]. All that happens is I get a reduced signal from my 1 and 2 channels coming through my 3 and 4 channels. On Thu, Aug 25, 2011 at 11:12 AM, FernandoG dataf...@gmail.com wrote: I am looking for a way to build a multichannel playback array, the idea is to control the movement of sound in a array of speakers in a wall. there is a way to do it without a super soundcard with many many outputs? a way to implement in pd? you'll need as many independent channels as independent speakers in your array J ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Gem VJ Tutorial patches
Hello No problem to play video for me. Do you Have you the README because if you don't have gridflow, it's impossible that you can play any video. But I haven't the preview in the patch in OSX. p Le 25 août 2011 à 00:25, Richie Cyngler a écrit : Hey Ant, I checked out your patch but I couldn't get it to open any video files. I tried .avi, .mov and .mpg on osX. thanks On Thu, Aug 25, 2011 at 6:25 AM, Antonio Roberts anto...@hellocatfood.com wrote: Hey, I use PD/GEM a lot for VJing using a version of this patch http://puredata.hurleur.com/viewtopic.php?pid=25492 It's definitely not a beginner's patch... One note about this patch: It only really plays videos, it doesn't do anything generative. Ant On 24 August 2011 21:07, Pagano, Patrick p...@digitalworlds.ufl.edu wrote: Hey I am soliciting examples for entry level GEM patches that work on linux/windows and OSX that show how to mix a video or react to sound. I recall a set of them called Begenswelder? That had a real good example for a sound reactive GEM patch but I cannot find it in my files, Please refresh my memory and as I asked anyone who has a simple patch(s) for understanding GEM or Vjing that works cross platform would be greatly appreciated. I have a few but I am trying to expand my cross platform examples. Thanks in advance pp ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- 07875 006 245 anto...@hellocatfood.com http://www.hellocatfood.com ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- Richie ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
