Pd-list May 2019

pd-list@lists.iem.at

49 participants
61 discussions

Re: [PD] Advice on PD versions for classroom deployment
by Dan Wilcox 25 May '19

25 May '19

> I would welcome advice about a strategy to deploy a monolithic "same > everywhere" version of PD. Ideally, this would be with a set of > libraries that are fixed at a given version and work the same on MacOS > and Windows. Pd-vanilla + a list of libraries to install via Deken would work. > Alternatively, would there be a way for me to install PD-vanilla and > Deken install some libraries in such a way that I can deploy a copy > with all dependencies in a single folder? If "single folder" is a hard requirement, then Christof's suggestion of using (abusing) the extra directory would work, albeit is considered bad practice at this point. This hides the library mechanisms form the user and almost guarantees they will be *fully* dependent upon your custom distribution as opposed to providing them a short how-to on using deken and encouraging usage of [declare]. The distributed library approach is the future at this point, so I see less of a reason of building a "custom extended." At the most, you could lobby for an "extended" deken metapackage which installs a long list of common libs. Pd vanilla has a newish "Documents directory" feature which can automatically create a "Pd" directory in the user's home/Documents directory. This also creates an "externals" subdirectory which becomes the designated place for deken to install to. Naturally, you can manually copy all externals there as well. Although this feature is annoying* to advanced users, it was a major suggestion by a couple of people on the forum who, like yourself, teach Pd classes. Having taught myself, I also saw the utility of providing a "patch & external home" akin to Processing's sketch directory. (* The documents directory feature is *very* easy to disable, either from the welcome dialog or within the Path dialog.) > In essence, the constraints have to do with the fact that software > installations are managed by our IT team, so I need to give them a > specific set of instruction and be reasonably guaranteed that the > results will work. Neither students (nor I) can I install software on > those machines. I assume each user account has write access it its own home folder? If so, either Pd can create the directory when they first run Pd and/or you can instruct the students to place the folder themselves. (Which reminds me that we could add a button to automatically open the folder from the Paths dialog.) The workflow would be like this: 1. Install Pd: - macOS: copy Pd-0.49-2.app somewhere win the user home dir, default place for this would the per-user Applications directory: ~/Applications - Windows: copy Pd app dir somewhere in the user home dir, ~/Desktop is fine as long as they can find & launch it 3. Create Pd Documents Dir: - automatically on first run: Pd will ask when it is first run if ti should create this directory; - manually in Pd: On the Path dialog and enable the Pd Documents directory if it's not already. 2. Install libraries: - without deken: You prepare an "externals" dir with the libraries you want them to have access to and provide it as a zip, etc. Then have them copy these into the Pd document dir. -with deken: Give them a list of library names to install; & walk them through installing the list via deken. It will automatically install them to the Documents/Pd/externals dir If it were me, I would actually provide the Pd documents dir within a zip with both externals *and* prepared lesson & example patches, ready to go. When the documents dir is enabled, the GUI open & save dialogs automatically start from with in the Documents dir. So the students download Pd, place the zip in their ~/home/Documents and should be ready to go. You then need to show them how to use [declare], but that can be within a lesson patch. :) If IT is not complete unhelpful, you could wrap up these steps into a script they could run. They would probably be more inclined to run it as opposed to doing things manually. :) OTOH, I will repeat that it's a good idea to familiarize students to the libraries process. > It's also important to me to insure that students can > bring their work to and from university to home, and that the work in > progress that send me opens and works on my machine. All the more reason, in my opinion, to teach them how to install libraries and use [declare]. -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

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Advice on PD versions for classroom deployment
by Martin Dupras 25 May '19

25 May '19

For several years now, I've been deploying Pd-extended in my teaching environments, and linking to the same installers so that my students could install exactly the same version on their own machines. (I am perfectly aware that Pd-extended has not been maintained for some time.) I would welcome advice about a strategy to deploy a monolithic "same everywhere" version of PD. Ideally, this would be with a set of libraries that are fixed at a given version and work the same on MacOS and Windows. I'm leaning toward Purr-data, but as I understand it does not yet have Gem on MacOS. Is that right? Alternatively, would there be a way for me to install PD-vanilla and Deken install some libraries in such a way that I can deploy a copy with all dependencies in a single folder? In essence, the constraints have to do with the fact that software installations are managed by our IT team, so I need to give them a specific set of instruction and be reasonably guaranteed that the results will work. Neither students (nor I) can I install software on those machines. It's also important to me to insure that students can bring their work to and from university to home, and that the work in progress that send me opens and works on my machine. Any good suggestions? Thanks, - martin

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Re: [PD] Advice on PD versions for classroom deployment
by Jérôme Abel 25 May '19

25 May '19

Hi, You can look at the malinette project. The "malinette-soft" is a single folder to download : http://malinette.info/en/. In some user cases : * we have not acces to administrator rights to install anything * we can't use Internet to download 10 libraries or more * 12 computers An interesting feature would be to add a file inside a project with a list of dependencies (like package.json) and run Deken to download all of them. Best. -- Jérôme Abel http://jeromeabel.net

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Happy Birthday Bob Moog!
by Billy Stiltner 24 May '19

24 May '19

Happy Birthday Bob Moog! Find it easier to control Miller's vcf~ and get nice resonance than the moog filter. https://billystiltner.bandcamp.com/track/groovy3-stiltner172ji

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Re: [PD] audio signal distinguishing
by sebfumaster＠aol.com 24 May '19

24 May '19

By having them appropriately low-passed and sampled. Digital audio is sampled. If you sample a real-world signal without putting a lowpass filter on it first, you will getthese frequencies of over pi radians. Notice how the higher frequency (3pi/2) gets sampled less than twice in one period, and the highest frequency thatcould be sampled twice a period is pi radians/sample. So, before sampling we need to put a lowpass filter on the signal in order to filter out everythinghigher in frequency than pi radians/sample. Otherwise, the higher-frequency real signals will "go past" the 2 sampling points and you will get 2 different sine waves that could be represented by the same samples. Therefore in practice, digital audio assumes that the samples represent sine waves lower than pi radiansin frequency. so if you did sample without low passing first, you would get these weird lower-frequency sine waves in your digital signal that correspond to air pressure waves (sounds) higher than the range of human hearing, assuming a normal sample-rate Also notice that if you have a real sampled cosine wave w/ higher frequency than pi radians/sample it can be represented as the frequency (frequency in radians - 2pi) which will be negative. This negative frequency will be the same as the positive frequency it will be confused for when sampled.If you have a sine wave that's higher than pi radians/sample, it will also be confused for the same corresponding negative frequency, but negative (shifted by 1/2 aperiod). Since all sinusoids are linear combinations of sine and cosine, this means that any sampled sinusoid of frequency higher than pi radians will be confused for thecorresponding frequency of radians if the higher frequency on the unit circle were flipped over the x axis from the negative to the positive-y part. (with thelower-frequency sine portion being multiplied by -1) and obviously if the signal to be sampled is higher than 2pi radians/sample in frequency it will be confused for the corresponding lower frequency on the unit circle,in radians/sample Hope this helps, -Seb -----Original Message----- From: Billy Stiltner <billy.stiltner(a)gmail.com> To: pd-list(a)lists.iem.at <pd-list(a)mail.iem.at> Sent: Thu, May 23, 2019 10:14 am Subject: [PD] audio signal distinguishing from chapter 3 of theory and techniques of electronic music"Figure 3.1: Two real sinusoids, with angular frequencies π/2 and 3π/2, showingthat they coincide at integers. A digital audio signal can’t distinguish betweenthe two." How does an audio signal distinguish 2 waveforms?_______________________________________________ Pd-list(a)lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list

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audio signal distinguishing
by Billy Stiltner 23 May '19

23 May '19

from chapter 3 of theory and techniques of electronic music "Figure 3.1: Two real sinusoids, with angular frequencies π/2 and 3π/2, showing that they coincide at integers. A digital audio signal can’t distinguish between the two." How does an audio signal distinguish 2 waveforms?

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https get in Pd
by Nicolas Montgermont 23 May '19

23 May '19

Hello everyone, What is the easiest way to get the content of a https webpage in pd, for example this one: https://tgftp.nws.noaa.gov/data/observations/metar/stations/CYDA.TXT Is there any patch that can do this around? It doesn't seem to work when using [httpget] wrapper based on [mrpeach/tcpclient] changed to connect on port 443 instead of 80: tcpclient: recv: Connection reset by peer (54) Thanks in advance! Best, n -- http://nimon.org

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Re: [PD] https get in Pd
by Dan Wilcox 22 May '19

22 May '19

This is the kind of thing I'd do with a separate worker process. You could easily write a python script that listens on an OSC port and grabs a given URL and saves it to a file. It might be something like 10-20 lines of code scraped from myriad examples online. Then send an OSC message back to Pd with the file path or read the file and send a formatted OSC message with the data you want. A tool like Python is great for this kind of use case as opposed to pure Pd. You can then write a simple shell script to launch the Pd patch and the Python script together to start the project. > On May 22, 2019, at 4:23 PM, pd-list-request(a)lists.iem.at wrote: > > From: Nicolas Montgermont <list(a)nimon.org <mailto:list@nimon.org>> > To: pd-list(a)mail.iem.at <mailto:pd-list@mail.iem.at> > Subject: [PD] https get in Pd > Message-ID: <050bca9a-a35f-d540-f87c-57b61f92712c(a)nimon.org <mailto:050bca9a-a35f-d540-f87c-57b61f92712c@nimon.org>> > Content-Type: text/plain; charset=utf-8 > > Hello everyone, > > What is the easiest way to get the content of a https webpage in pd, > for example this one: > https://tgftp.nws.noaa.gov/data/observations/metar/stations/CYDA.TXT <https://tgftp.nws.noaa.gov/data/observations/metar/stations/CYDA.TXT> > Is there any patch that can do this around? > > It doesn't seem to work when using [httpget] wrapper based on > [mrpeach/tcpclient] changed to connect on port 443 instead of 80: > tcpclient: recv: Connection reset by peer (54) > > Thanks in advance! > Best, > n -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

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Re: [PD] GEM camera input unavailable
by Dan Wilcox 22 May '19

22 May '19

> In launching Pd or using Gem patches, this never happens. > And it's just never available. It never happened because the camera was no longer accessible to Gem. To clarify: Gem 0.93 did not stop working, only those plugins which used Quicktime stopped working as Quicktime is no longer shipped with macOS 10.13+, ie. pix_video, pix_film, etc. Gem 0.94 solves this by introducing replacement plugins which use the newer AVFoundation macOS framework. -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

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Jackpilot in 64 bit
by mauricemoncozet 21 May '19

21 May '19

Hello I often use Jackpilot to connect Pd with for example Mainstage or Logic pro. My Mac computer (OS 10.14) tells me more and more often that this software (actually in 32 bit) will not work anymore on future Macs. Does anyone know if Jackpilot will be updated to 64bit? Thanks for all. M Moncozet ----------------------------------------------------------------------- http://mauricemoncozet.free.fr

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Pd-list May 2019