Pd-list February 2018

pd-list@lists.iem.at

72 participants
83 discussions

glitches when streaming UDP
by Roman Haefeli 07 Feb '18

07 Feb '18

Hey all I'm working on a patch that transmits audio through UDP. The patch runs totally smooth on macOS (10.10 and 10.11) with Pd 0.48-1 and JACK as back-end. On the Linux machines I tested (all Ubuntu 16.04) with the same version of Pd I get a lot of glitches, although I'm using very similar Jack settings (128 frames/period, 3 periods). Glitches happen more frequently when UDP streaming is on, but don't completely disappear when I stop UDP transmission. So, relatively to macOS, Pd seems to be more prone to glitches on Linux. Just to be sure that my Linux machine is up to task I tuned it with the help of [1]. I get very stable performance with softwares like Ardour, even under load. It's only Pd that creates glitches. I also observed that Pd experiences drop outs while jack reports not glitches. I believe to have observed that ardour only glitches when jack does. So, it seems Pd is less "tightly coupled" to jack, does that sound right? Is there anything I can do to tune Pd for stable low latency (on Linux)? BTW: What happened to those messages when running with -rt: "priority 6 scheduling enabled. priority 8 scheduling enabled." Roman [1] https://github.com/raboof/realtimeconfigquickscan

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Gem somewhat more adaptive background subtraction?
by Peter P. 06 Feb '18

06 Feb '18

Hi list, just wondering if anyone has looked into a way to subtract a background in Gem pixes using a hybrid approach between frame difference [pix_movement] and difference to a static snapshot [pix_background]. I want to be able to detect object in front of a background also during slow light condition changes or unsupervised operation in say a gallery context. I can remember that EyesWeb had an adaptive background subtraction, that did possibly time-average a series of images to derive the background snapshot. Has anyone done anything more fancy in Gem than the two wonderful objects above offer? thanks for all ideas! Peter

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Re: [PD] slider appearance change somewhere between 0.47 and 0.48
by Dan Wilcox 06 Feb '18

06 Feb '18

It's more likely a change since 0.48-1 where the GUI work I did was introduced. I did try to enforce drawing order on some of the GUIs and make sure the control does not get covered but I suppose that is a bug to some. It's an easy fix to change back. > On Feb 2, 2018, at 12:00 PM, pd-list-request(a)lists.iem.at wrote: > > From: Roman Haefeli <reduzent(a)gmail.com <mailto:reduzent@gmail.com>> > To: Pd-List <pd-list(a)lists.iem.at <mailto:pd-list@lists.iem.at>> > Subject: [PD] slider appearance change somewhere between 0.47 and 0.48 > Message-ID: <1517505629.2116.14.camel(a)gmail.com <mailto:1517505629.2116.14.camel@gmail.com>> > Content-Type: text/plain; charset="utf-8" > > Hey all > > Before I report anything to a tracker, I may ask whether it was an > intentional change. Up until 0.48, the label text of any gui widgets > (sliders, etc.) appeared above the front. Since 0.48, the front covers > the label text, changing the appearance of patches that have > overlapping front and label. > > See here: > https://netpd.org/~roman/tmp/front_above_label.png <https://netpd.org/~roman/tmp/front_above_label.png> -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

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sr04 with arduino standardfirmata
by ray Y 06 Feb '18

06 Feb '18

Hello Alex I have been able to use the sr04 with comport but not with standardfirmata the problem is that i need to sacrifice and entire controller and a bluetooth connection in order to handle the sr04 instructions all by themselves and this is not elegant. it could be nice to have a mekanism where the trigger and eko processes will give a range distance result from 0 to 1(firmatas format) into an analog input so that it could be handled with the rest of the sensors, or into an digital IO if that is not possible without electronics. cheers r.y

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sources for externals
by rolfm＠dds.nl 06 Feb '18

06 Feb '18

hi, triggered by the announcement that OSX is going to exclude 32-bits progs i was looking for the sources of externals i use. since Pd is an open-source project i expected that the externals i download with deken include the source code. however, only 1 out of the 10 i (gratefully) use includes the src. shouldn't we advocate a policy for deken uploads to include this by default? rolf

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sr04 with arduino standardfirmata?
by ray Y 06 Feb '18

06 Feb '18

is there a work around for this? the sr-04 is a way cooler sensor than the ones supported by standardfirmata! why is it not supported? there most be a hack to make the emiter and receiver functions act as one with the signal going into the analog inputs of the arduino. as a standard sensor? wow, i google and there is almost nothing out there about this i'm a bit tired of trying to do this please help thanks r.y

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Re: [PD] sensing whether a window is active
by Dan Wilcox 06 Feb '18

06 Feb '18

That external is part of the miXed library. The Pd-extended era externals exist on http://git.puredata.info/cgit/svn2git/libraries/miXed.git/tree/toxy <http://git.puredata.info/cgit/svn2git/libraries/miXed.git/tree/toxy> If it hasn't happened already, maybe someone wants to update miXed to use pdlibbuilder and provide builds on deken. *You* have the power now... > On Feb 6, 2018, at 5:17 AM, pd-list-request(a)lists.iem.at wrote: > > Date: Mon, 5 Feb 2018 12:32:00 +0100 > From: "Ingo" <ingo(a)miamiwave.com <mailto:ingo@miamiwave.com>> > To: "'PD list'" <pd-list(a)lists.iem.at <mailto:pd-list@lists.iem.at>> > Subject: Re: [PD] sensing whether a window is active > Message-ID: <000901d39e74$f0571470$d1053d50$(a)miamiwave.com <mailto:000901d39e74$f0571470$d1053d50$@miamiwave.com>> > > I have been using [toxy/tot] for this which is unfortunately deprecated and > can't be found anymore although the external that was included in > Pd-extended still works for me on Debian. > I'd love to find an alternative as well. > > Ingo -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>

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Pd on Tiny Core Linux on Raspberry Pi
by Chris McCormick 05 Feb '18

05 Feb '18

Hi all, This is fan mail for Pd on Tiny Core Linux onn Raspberry Pi. TCL is a 50 megabyte GNU/Linux distribution which is immutable-by-default and runs very well on the Raspberry Pi. I managed to compile Pd and got it to output a test tone which is why I am posting here. To do it yourself: * Install the alsa packages * Install the compiletc package * Compile Pd with `make -f makefile.gnu` inside the src directory * Run `pd -nogui mypatch.pd` from the bin directory If you want to launch a Pd patch at startup add your command to /opt/bootlocal.sh So far this seems like fertile ground as an alternative to the Raspbian distribution with its multiple-gigabyte bloat. Seems perfect for embedded Pd devices like guitar pedals, synths, and what-not. Tiny Core Linux does not use systemd. Cheers, Chris. -- http://mccormick.cx/

3 3

max value of last n samples
by Roman Haefeli 04 Feb '18

04 Feb '18

Hey all Can this be done in vanilla? I'd like to output the maximum value of the last N input samples in the signal domain. Ideally N would be adjustable. It bugs my mind, but I can't think of a solution for this simply problem. Roman

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64 bit windows test build for Pd
by Miller Puckette 03 Feb '18

03 Feb '18

Thanks to iohannes Zmoelnig, Dan Wilcox, and Spacechild1, it's now possible to compile Pd as a 64-bit windows native application. I'm hoping this will fix the recent trouble arising from new ASIO devices not showing up in 32-bit Pd versions. The new one's available on the usual page: http://msp.ucsd.edu/software.html Beware that (as we've already gone through for Mac and linuz) 32-bit externs won't load into 64-bit Pd - you'll need to make or find 64-bit compiled versions of them. cheers Miller

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Pd-list February 2018