Pd-list March 2013

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104 participants
145 discussions

Re: [PD] "musical" timing, something like Max´s "metrical timing Transport" and [metro 16n]
by Ingo 23 Mar '13

23 Mar '13

I don't have an exact plan on how to do this without spending a lot of time finding the most effective way for getting the accurate sample positions. Maybe someone else has done that before. However, in your particular case I would simply use midi clock from Ableton to sync the two. That looks much easier. If your timing resolution is a maximum of 24 clocks per quarter note you don't have to do anything. Just trigger the Pd sequencer steps from the incoming midi clock. If you need a higer resolution you could simply use a [timer], [cputime] or [realtime] to check the time from one clock to another and use that for subdividing for higher resolutions. As in the example below with 120 BPM and 500 ms per beat each midi clock would have a resolution of 20.83333... ms (500 / 24). Using a resolution of 96 / quarter note you would have to divide this by 4 which comes out to 5.208333... ms. (BTW, you can see already from the 5.2083333333... ms that the time you would have to enter for the metro would render a tempo that is slightly off!) Syncing to midi clock would allow you to follow the tempo that is programmed in Ableton without having to worry about calculating the duration of each clock. In Pd use [midiin] and [route] or [select] to get F8 (hex) = 248 (decimal). This is how to get the clock time of 96 clocks / quarter note: [midiin] | [sel 248] | [t b b] | | [timer] | [/ 4] Don't start interpolation until the second incoming clock (or provide a usable value before the first clock is coming in). I.e. when starting jump from 0 to 4 and then increase by 1. Check out the midi specs for additional features like song pointer or midi timecode (which has nothing to do with midi clock), etc. Ingo > Thanks Ingo, I must do the testing. In fact Im recordind de midiout to > Ableton Live. > "recalculating the position from time to time and resyncing to the > absolute sample position might be necessary" how can I do this? > did you see my patch? im working with something lika a "master" metro > and a couple of "slave" metro objetcs that control a particular > sequence. > > > 2013/3/21 Ingo <ingo(a)miamiwave.com>: > > I would assume that the rounding errors of metro would make the > > tempo > drift > > after a while - depending on the speed. > > > > Using the sample rate would be more accurate. > > > > In order to insure that the rounding errors are not influencing the > > the position after a long time recalculating the position from time > > to time > and > > resyncing to the absolute sample position might be necessary. > > > > However, such an accuracy would only be needed if the music is to be > synced > > to anything external like a DAW, I guess. > > > > Ingo > > > >> If you mean milliseconds to bpm and vice versa: > >> > >> minute = 60,000 ms; > >> > >> bpm * ms = 60,000; > >> > >> bpm = 60,000 / ms; > >> > >> ms = 60,000 / bpm; > >> > >> [120 \ > >> | > >> [t b f] > >> | / > >> [60000( > >> | / > >> [/ ] > >> | > >> [500 \ > >> > >> Send this to the right inlet of [metro]. Then connect a counter > >> [int ]/[+ 1]/[% 16] (outlet of the modulo to right inlet of [int]) > >> to the outlet of [metro]. That then counts from 0 to 15 with an > >> interval of 500 ms. > >> > >> --Funs

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what is the pd-event in NY (8th april) ?
by Фывапр Олджэвич 22 Mar '13

22 Mar '13

Hi , List ! What's the PD-event planned for 8th of April on New York ? I totally lost the info about it ! thanks !

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[PD-announce] Biophysical music Poland Tour - Bios@Techne@Art
by Marco Donnarumma 22 Mar '13

22 Mar '13

Dears, it's with great pleasure that I forward you the dates of this upcoming Poland tour. You'll find dates and location below. Curated by Maciej Ozog, Bios@Techne@Art is a program of performative events spanning 4 major cities in Poland. The aim is to foster discussion around the role of biotechnologies in performance art, and explore how such framework can inform the cultural perception of the body. According to each venue, I'll be performing three diverse pieces of biophysical music for the open and free instrument Xth Sense (Pd/Linux based): - Music for Flesh II, solo piece for enhanced body - Ominous, incarnated sound sculpture - Hypo Chrysos, action art for vexed body Works info: http://marcodonnarumma.com Xth Sense and biophysical music: http://res.marcodonnarumma.com/projects/xth-sense/ Each concert will also see on stage: - Maciej Ozog's Transient Body / Liminal Space, - Gerard Lebik's Tractography Neural Tracts Noise \\\\\\\\\\\\\\\\\\\\\\\\\\ WHEN & WHERE: - 27.03.2013, 7 pm, Gdansk Laznia Centre for Contemporary Art, Jaskółcza 1, 80-767 Gdansk, Poland - 28.03.2013, 8 pm, Warsaw Centre for Contemporary Art Ujazdowski Castle, ul. Jazdów 2, 00-467 Warsaw, Poland - 29.03.2013, 8 pm, Wroclaw Falanster, ul. Św. Antoniego 23, 50-073 Wroclaw - 02.04.2013, 7 pm, Lodz (Panel discussion) Art Factory, ul. Tymienieckiego 3, 90-365 Lodz, Poland - 03.04.2013, 8 pm, Lodz Art Factory, ul. Tymienieckiego 3, 90-365 Lodz, Poland For complete details to attend the events see: http://biointerfaces.333flow.com hope to see some of you there! best wishes, -- Marco Donnarumma New Media + Sonic Arts Practitioner, Performer, Teacher, Director. Embodied Audio-Visual Interaction Research Team. Department of Computing, Goldsmiths University of London ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Research: http://res.marcodonnarumma.com Director: http://www.liveperformersmeeting.net _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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- get label from canvas ?
by Fero Kiraly 22 Mar '13

22 Mar '13

Hallo list, it is possibile to get label from canvas ? fk.

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Audio In on Raspberry Pi
by Johann Diedrick 21 Mar '13

21 Mar '13

Hey Pd list- I'm having a bit of trouble debugging whether or not I can use Pd to get audio in on the Raspberry Pi. I'm using this USB audio dongle: http://www.amazon.com/gp/product/B000N35A0Y/?ref=oh_details_o03_s01_i01&tag… Following t3db0t's instructions, I am able to get audio out from Pd. Further research got me to edit my /boot/cmdline.txt file to add "dwc_otg.speed=1" at the end: dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait dwc_otg.speed=1 I also went ahead and removed pulse audio. I ran it twice just to be sure: ohann@raspberrypi ~/pd $ sudo apt-get remove pulseaudio Reading package lists... Done Building dependency tree Reading state information... Done Package 'pulseaudio' is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded. Running alsamixer, it looks like my speaker and mic are on and armed, and my capture tab is on with the levels up. Rebooting for good measure, I am still able to get t3db0t's testPatch.pd to work. I'm running this command with these flags: pd -nogui -sounddev 1 testPatch.pd I made a simple mic test on my mac to try testing the microphone in Pd on my Rasberry Pi. My very simple mic test can be found here: http://heavenoutside.net/pd/mictest.pd if you'd like to wget it. It is simply taking adc and sending it to dac. When trying my mictest.pd patch, I hear a low constant tone that seems to be affected if I wiggle my mic input around. If I unplug my mic it becomes unbearably loud, then gets quiet again, making me think the input is kind of sort of working, but not really... I'm not sure what other info might be helpful, but here is my asound.conf file: pcm.!default { type hw card 0 device 0 } And here are my devices listed with pd -nogui -listdev: johann@raspberrypi ~/pd $ pd -nogui -listdev audio input devices: 1. Generic USB Audio Device (hardware) 2. Generic USB Audio Device (plug-in) audio output devices: 1. Generic USB Audio Device (hardware) 2. Generic USB Audio Device (plug-in) API number 1 no midi input devices found no midi output devices found snd_pcm_hw_params_set_channels (input): Invalid argument Please let me know if you need anymore information from me. I could do some screen grabs from alsamixer if that would be helpful. Thanks for any help in advance! All the best, Johann

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Re: [PD] "musical" timing, something like Max´s "metrical timing Transport" and [metro 16n]
by Ingo 21 Mar '13

21 Mar '13

I would assume that the rounding errors of metro would make the tempo drift after a while - depending on the speed. Using the sample rate would be more accurate. In order to insure that the rounding errors are not influencing the the position after a long time recalculating the position from time to time and resyncing to the absolute sample position might be necessary. However, such an accuracy would only be needed if the music is to be synced to anything external like a DAW, I guess. Ingo > If you mean milliseconds to bpm and vice versa: > > minute = 60,000 ms; > > bpm * ms = 60,000; > > bpm = 60,000 / ms; > > ms = 60,000 / bpm; > > [120 \ > | > [t b f] > | / > [60000( > | / > [/ ] > | > [500 \ > > Send this to the right inlet of [metro]. Then connect a counter [int > ]/[+ 1]/[% 16] (outlet of the modulo to right inlet of [int]) to the > outlet of [metro]. That then counts from 0 to 15 with an interval of > 500 ms. > > --Funs

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bang vs empty list
by Jonathan Wilkes 21 Mar '13

21 Mar '13

Seems like for any object that doesn't have a bang method nor list method, an empty list silently gets discarded. compare [bang( | [sin] to [list( | [sin] or, more likely [bang( | [t a] | [sin] Same for [select] and many others. Is there a way to fix this? -Jonathan

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"musical" timing, something like Max´s "metrical timing Transport" and [metro 16n]
by Jm Jones 21 Mar '13

21 Mar '13

Hi, Im writing a patch that can work with common beat division instead of milliseconds notation. In Max there's a Transport object and the possibility to connect it to metro objects that work with beat division arguments instead of ms, ej [metro 4n]. Something equivalent exists in PD? I made subpatches that make some of the work, attached -- JM Jones

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ALSA output error (restart failed): Broken pipe
by oscar santis 21 Mar '13

21 Mar '13

When I start and run Pd-Extended 0.43.4 I have this problem "ALSA output error (restart failed): Broken pipe". I've read some threads about other people with this problem, but nobody have a solution. I tried with this command "pauspender pd-extended" and the message and clicks don't stop. Using Jack i hear more clicks than ALSA. If someone have a tip for setting audio drivers in Linux, specially Jack publish it please. My system is Ubuntustudio 12.04, Acer Aspire One, atom 1.60 Ghz, 1 Giga RAM. -- óscar santis escultor, pintor, ruidista http://www.oscarsantis.cl http://www.flickr.com/oscarsantis http://www.soundcloud.com/oscarsantis tel: ++ 56 9 84280381

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Running gem in a separate thread
by Ivica Bukvic 21 Mar '13

21 Mar '13

IOhannes, How hard would it be to implement gem so that it runs in a separate thread kind of like what PDP library can do with a simple toggle? This would solve problem of having to run two instances of pd just to have xrun free audio.

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Pd-list March 2013