Pd-list March 2013

pd-list@lists.iem.at

104 participants
145 discussions

Sensors GPIO Raspberry Pi Pd
by Julian Brooks 08 Apr '13

08 Apr '13

Hi all, We've been after some sensors for motion detection on the RPi and Martin Peach spotted these (thanks again Martin!) http://uk.farnell.com/omron-electronic-components/d6t-44l-06/sensor-thermal… They're fairly new and I've not been able to find anything about anyone making use of them on the RPi as of yet (though after posting a question on the RPi forum I did note that Farnells stock went from 48 the 4 in three days, so maybe something soon eh?:). I've got absolutely no idea what I'm doing with this so could do with some 'hand-holding'. What I would much prefer would be to keep everything within Pd if possible... 1st off, and possibly dumb question - do we need [hid]? - My previous experience with xbee sensors did, so this is why I'm asking. There are a few mentions of using python to get the data received on the Pi and then OSC'ing that into Pd but Miller mentioned on another thread "gpio on the raspberry pi from within pd ?" about writing an external to keep it within Pd. Any news/progress/tips on that front? In the same thread Charles Goyard seems to have it working with [textfile], which seems far too simple (I'd very much like that if that was the case) The sensor transmits the data as i2c but I haven't found anything in the archives particularly about anyone translating i2c directly in Pd yet? We're going to fire the sensors up and see what happens in an hour or so and then come back to it tonight for a proper session so any and all pointers gratefully accepted. I'll be back to let you know our 1st results soon. Cheers, Julian

2 10

subnormal numbers explained
by katja 04 Apr '13

04 Apr '13

Hello, Found this instructive article about subnormals (called denormal numbers there): http://www.google.nl/url?sa=t&rct=j&q=musicdsp%20denormal&source=web&cd=3&v… Subnormal numbers are a pain in the ass, they cause substantially increased CPU load without doing anything useful for audio DSP. Unfortunately it can happen in some Pd objects (notably [freeverb~]), and spoil the performance of a Pd patch. The article explains why subnormal numbers occur, and what can be done to eliminate or prevent them. Katja

4 3

Changing the "grid" size when moving objects with shift+arrows
by matijoncek prdoncek 03 Apr '13

03 Apr '13

Hello list, I am working on a microtonal sequencer made with data structures (the structures represent notes) that will read their position on the canvas as their position in time and pitch. I was wondering if it's possible to change the the number of pixles by which the objects move when you select them and use shift and the cursor buttons to move them. I need this because it makes a lot more sense to divide a semitone and a 16th note into 12 equal parts as opposed to the default 10 and it would be convenient to shift+arrow move the notes around the canvas. Cheers, Matija

3 2

PuREST JSON 0.11 for 32bit Build Request
by me.grimm 03 Apr '13

03 Apr '13

Hello, I have a student interested in exploring this. She is using the 32bit extended build. Can someone build this for the 32bit pd-extended w/ all libs embedded for me? I have no way to build this on my system without some great effort. If someone still has a 10.5 fink 32bit build system.... hans? maybe on the 10.5 build pdx system? m -- ____________________ m.e.grimm | m.f.a | ed.m. megrimm(a)gmail.com _________________________________

1 1

[ANN] New External: tglgrid, a togglable grid of cells
by Nick Lanham 03 Apr '13

03 Apr '13

Posting here too since I got a lot of silence on pd-dev. From the README: A tglgrid is a grid of cells that can each be toggled on and off. It can be instantiated with different dimensions depending on your project's needs. You can bang the left input to output a list of the active cells in the currently active column and send a column number to the right input to select the active column. Cells can also be toggled and/or turned on/off by sending messages: "tgl col row", "on col row", or "off col row". Right now this has only been tested on linux. I would appreciate any reports about success and/or failure of running this in other environments. The github page is here: https://github.com/nicklan/tglgrid You can find screenshots there if you're interested. As this is my first external, I'm sure I've made some horrible coding/design mistakes and appreciate any feedback in that regard. Cheers! -Nick

4 5

installing pd 32 bits in a 64 bit linux?
by Jm Jones 02 Apr '13

02 Apr '13

Hi, im a little confused because in windows this works different (i think). In win7 64 bits i use pd-extended 32. But In ubuntu 64 bits the 64 bits pd package says that some externals aren't fully compatible, so i want to install the 32 b version, is this possible? cheers -- JM Jones

4 5

latest pd-extended-0.44 on win32
by Patrice Colet 01 Apr '13

01 Apr '13

Hello, I'm trying to make it working, yesterday there was a missing libjack.dll problem, it has been fixed by eighthave today, now I'd like to have Gem working... [gemwin] is just not responding, no error message, with any patch, it does not answer after it's creation... no idea how else I could report this. Colet Patrice

5 9

[GEM] catalyst's multiscreen on ubuntu with amdcccle
by Patrice Colet 30 Mar '13

30 Mar '13

I'm making this thread just to prevent that ubuntu's multiscreen tools aren't good, and that there is a good command line that is not mentionned in ubuntu forums or manuals, I've found it in archlinux forums and it's called amdcccle, this command line should be available when proprietary drivers are installed. Colet Patrice

1 0

Re: [PD] [LAU] 'Modular' midi controller for keyboard
by Simon Wise 30 Mar '13

30 Mar '13

On 30/03/13 05:35, rosea.grammostola wrote: > > The bcr2000 has rotary encoders with LEDS. > > The bitstream 3X does have potentiometers and it's possible to set the 3X in > such a way that the know has to pass the value of an control in a certain > software, before it gets 'on'. I find the need to move the knob (or a fader) to pick-up the value as above very clumsy in many circumstances ... especially when fine tuning something it is difficult to make the first small adjustment, and requires finding the target value first from the computer screen etc. Its OK if you have enough knobs so that you can control most things you want to without switching. > Potentiometers seems to have the advantage of being more accurate and have a > more analogue feel. I'm not so sure about the more accurate .. it is possible to scale the encoders so they need many rotations for the full sweep of values if you want very fine tuning, and the BFC2000 has 14 bit modes using 2 midi channels to make full use of this accuracy. You can do something like set the push-down position of the encoder to switch to the fine scaling if you want. And certainly compared to old rotary faders from analogue radio days the encoders are lacking some feel, but not compared to most of the smaller knobs on analogue mixers and such. > > The question is whether the X3 is good for controlling softsynths like AMS / > Ingen and stuff like SuperCollider. Or are rotary encoders better for this. Certainly you can see smaller differences looking at the position of a (big) knob compared to the discrete values you can see from the ring of leds, but on the other hand leds can be very easily visible at a glance and the BCF2000 has several display modes to help keep track of its current purpose, again very handy if you are say switching between frequency, Q and gain or something like that. And of course looking at a knob that isn't an encoder you need to remember if you have picked-up its real value yet, or if it is still in the position left from its last purpose. IMO if you have enough knobs so you don't need to switch them between controls very often then they would be fine, but if you want to control more values than you have physical controllers the encoders, motor drive faders and the paging facilities on the BCF, BCR and similar is better. I've found the layout, leds and positioning of buttons n the BCF very useful for a very wide range of live control tasks, and its still going strong and many years old. The main thing that I have found missing on the BCF2000 is touch sensing on the faders, so that when a fader is touched that info is sent to the software. That feature is very useful in recording automations. Simon > > \r > > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-user >

2 1

GPIO into RPi
by Julian Brooks 29 Mar '13

29 Mar '13

Hey Alex, Many thanks for the python to Pd tutorial. Could you share how you setup the GPIO pins to send and receive into python please? There is, in some ways, too many ways to do it through trawling the web and I would like to hear from someone who also shares the goal of getting the data eventually into Pd. Cheers, Julian ---------- Forwarded message ---------- From: Alexandre Saunier <saunier.alexandre(a)yahoo.com> Date: 12 March 2013 18:19 Subject: Re: [PD] Ultrasonic Range Finder To: Julian Brooks <jbeezez(a)gmail.com> Cc: PD List <pd-list(a)iem.at> Hi Julian, The WRM1 seems to work the same way as the ones I know. I'd be interested to know how it reacts and what you do with it! My git hub is alx-s. I've just added athe RPi_tutorials repo ( https://github.com/alx-s/RPi_tutorials) with a first tutorial concerning OSC bewtween python and pd. Keep in mind I'm new to git and I write the tutorials as I work. If you spot any mistake, have, suggestion or have anything to add, ..., please tell me! That's all I've written for today but others will come by the end of the week (GPIO, using Maxbotix...). Good luck with it ;) Have fun, Alex ------------------------------ *De :* Julian Brooks <jbeezez(a)gmail.com> I'm thinking this one XL-MaxSonar - WRM1 look forward to checking tutorials. What's your github address? Cheers, Julian On 12 March 2013 14:35, Alexandre Saunier <saunier.alexandre(a)yahoo.com>wrote: 'Power filters' are simple RC filters you can solder directly on the sensor, they help eliminating electric noise. Since the analog output of the sensor depends on the voltage with which it is fed, the cleaner the supply voltage, the better the analog output. I don't know which sensor you're gonna us, but assuming it works like the MB1000 or MB1200, you will find a lot of useful tips inside the datasheet and in the tutorial page. I'll start cleaning up my mess and a few short tutorials should be on my github by this evening. Best, Alex ------------------------------ *De :* Julian Brooks <jbeezez(a)gmail.com> ** Hi Alex, Many thanks for the info. What are 'power filters'? Yes on RPi, so tutorials would be very helpful. Best wishes, Julian On 12 March 2013 13:32, Alexandre Saunier <saunier.alexandre(a)yahoo.com>wrote: Hi Julian, As for the URF, I can't give you any infos but I've been using Maxbotix's indoor sensors a few times. One thing you really want to take into acount is the fact that sensors interract with each others, you therefore need to chain them properly. You might want to take a look at power filters too. Maxbotix's tutorial page has been quite useful to me so far. As to get the infos to pd, I've been using these sensors with a raspberry pi. My option has been to collect the data from the RPi's GPIO using python and then send them to pd using OSC. I'm starting to write small tutorials explaining what I've been through, if you use the RPi too I'd be happy to point them to you. Have fun, Alex ------------------------------ *De :* Julian Brooks <jbeezez(a)gmail.com> *À :* PD List <pd-list(a)iem.at> *Envoyé le :* Mardi 12 mars 2013 13h58 *Objet :* [PD] Ultrasonic Range Finder Hi, I'm after some advice: For an installation piece I'd like to do I'm investigating range finder sensors (for outdoors). Has anyone experience of the Maxbotic URF's and any tips they'd like to share for getting the data into Pd? Cheers, Julian _______________________________________________ Pd-list(a)iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list

2 1

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

Pd-list March 2013