Pd-list April 2008

pd-list@lists.iem.at

132 participants
205 discussions

tutorial on struct/template usage?
by Nicola Bernardini 26 Apr '08

26 Apr '08

Dear all, is it me, or the part on struct/template objects is rather obscure as far as documentation goes? I really would like to do something with these objects, and now I have the occasion to do it, but I am not able to guess how to do it for the life of me. Is there a tutorial/howto/whatever somewhere that tackles these topics? I swear I googled around and around with no success before writing. nicb -- Nicola Bernardini Scuola di Musica Elettronica Conservatorio C.Pollini Padova e-mail: nicb(a)sme-ccppd.org http://www.conservatoriopollini.it http://www.sme-ccppd.org http://www.nicolabernardini.info GPG fingerprint = 6AE6 AF21 E160 D9B3 396E EBAC 906C CFAE 4D65 D910 Neither MS-Word nor MS-PowerPoint attachments please.

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Re: [PD] pd-msg
by Mike McGonagle 26 Apr '08

26 Apr '08

On Thu, Apr 24, 2008 at 7:27 PM, Luigi Rensinghoff < luigi.rensinghoff(a)freenet.de> wrote: > > do you know how the numbers change if you cut everything from patch and > paste it back in ?? my impression is that it does not start from zero ?? > What if you copy it to a new patch ? then it should start from zero..... > Well, if you are making these patches PROGRAMMATICALLY, then you can't cut and paste, as there is no way to do that in programming. You might want to open up some abstractions in a text editor, you can see the code that PD uses to create these objects directly. It is very enlightening. > > > Well sure i could keep track of that....but what if i would like to modify > an existing patch.... > Can't do it programmatically. You can only add objects to an existing patch, and if it is something that already has existing objects, there is no way to know how many objects are already in a patch. mike -- Peace may sound simple—one beautiful word— but it requires everything we have, every quality, every strength, every dream, every high ideal. —Yehudi Menuhin (1916–1999), musician

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Cyclone in vanilla?
by Andy Farnell 25 Apr '08

25 Apr '08

Did I read that Cyclone is to be incorporated into vanilla Pd? Having discovered too late that [pow~] is not part of vanilla I am about to remove the constraint of using vanilla Pd for the synthetic sound design book since it is incomplete without basic mathematical operators. andy -- Use the source

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Re: [PD] I'm stuck in a corner, please help! RE: [delta~] object was: Re: Cyclone in vanilla?
by Matt Barber 25 Apr '08

25 Apr '08

Hello, For [z~ 1] you can use [rzero_rev~ 0] -- its response is: y[n] = -a[n] * x[n] + x[n-1] setting the coefficient to 0 gets rid of the current input and leaves the one-sample delay. Thanks, Matt > Date: Fri, 25 Apr 2008 12:21:54 +0200 > From: IOhannes m zm?lnig <zmoelnig(a)iem.at> > Subject: Re: [PD] I'm stuck in a corner, please help! RE: [delta~] > object was: Re: Cyclone in vanilla? > To: Enrique Erne <enrique(a)netpd.org> > Cc: pd-list(a)iem.at > Message-ID: <4811B0C2.20504(a)iem.at> > Content-Type: text/plain; charset=ISO-8859-1 > > Enrique Erne wrote: > > IOhannes m zm?lnig wrote: > >> Enrique Erne wrote: > >>> or [biquad~ 0 0 0 1] > >>> > >>> > >>> Miller Puckette wrote: > >>>> I believe z~ is just rzero~ 0. > >> > >> no. > >> both of them are equivalent to [z~ 1] > >> > >> you could also argue that [f] is just the same as [0( > >> :-) > > > > oups, yes ofcorse z~ 1. > > > > the output of 1 sample with rzero~ 0, z~ 1 and biquad~ 0 0 0 1 seems to > > be slightly different. if one wants to be fuzzy about that :) maybe ome > > rounding problem? > > no, i don't see any rounding errors... > > > > > and now i even couldn't do the delwrite/read with the subpatch :( :( > > it's generally a good idea to tell [delwrite~] how much space it should > allocate for the delayline. e.g. [delwrite~ abcd 1000] helped a lot... > > > and [rzero~ 0] is not the same as [z~ 1]. > > > the output of [z~ 1] is y[n]=x[n-1] > according to [rzero~]s help-patch it does the following: > > y[n]=x[n]-a[n]*x[n-1] > since you set a[n] to "0", you just get y[n]=x[n] :-( > > to get [z~ 1], do something like > > | > +--+ > | | > | [rzero~ 1] > | | > [-~] > | > > > fmgads.r > IOhannes >

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Wacom tablet support on MacOSX
by enrique franco 24 Apr '08

24 Apr '08

Hi, Is there Wacom tablet support for the newers versions of PD on OSX? Thanks, -- Enrique Franco Telefono/Phone: +572 5552334 ext 388 Webpage: http://richie.idc.ul.ie/~enrique/ http://www.iua.upf.es/~ffranco/pfm.htm

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configuring ubuntu: hid readable + Intuos3
by João Pais 24 Apr '08

24 Apr '08

[this mail was sent erroneously to the pd-dev list, insted to here] Hi, I'm trying to configure my system to start using ubuntu (7.10). So far so good, unbuntustudio, pd (both versions) and jack are working. I was looking into hid, but I don't have permission in udev to read /dev/input. I saw that there were some posts on the list about this, but no one was either clear enough/made for ubuntu (more for debian). I thought, instead of loosing lots of time on myself and potentially becoming frustrated and destryoing my system, I ask for 5 minutes to someone else and potentially will waste only 1/2 hour later, and everything will work. Also in puredata.info there was nothing about this topic, even though a great number of persons already went through these steps. I guess I'll do a report once things are working, for the next sucke.., uh, person who tries to venture into this. Below are my xorg.conf and a list of my current input devs (identified, as I could with cat /dev/input/xxx). My questions would be: - I'm using an ibm thinkpad with trackpoint & touchpad, + an usb wacom Intous3. How can I get Pd (hid) to capture the Intuous3, without the intous3 controlling the cursor? [The trackpoint is using the "mice" driver, which apparently is wrong] - is it possible for the intuos3 to behave like stated in pd, but like a normal mouse controller outside of pd? I guess not, but just wanted to know. - did anyone got the side pads and buttons of the Intuos3 to work? I saw few documentation in the net about it. I got the pads on my xorg.conf, but I have no program that can test it for now. I guess that might be it for now. Thanks for you r help. Joao PS: when this is finished, my next step will be the rme multiface. are there any good pages to look at that? -- XORG.CONF -- # xorg.conf (xorg X Window System server configuration file) # # This file was generated by dexconf, the Debian X Configuration tool, using # values from the debconf database. # # Edit this file with caution, and see the xorg.conf manual page. # (Type "man xorg.conf" at the shell prompt.) # # This file is automatically updated on xserver-xorg package upgrades *only* # if it has not been modified since the last upgrade of the xserver-xorg # package. # # If you have edited this file but would like it to be automatically updated # again, run the following command: # sudo dpkg-reconfigure -phigh xserver-xorg Section "Files" EndSection Section "InputDevice" Identifier "Generic Keyboard" Driver "kbd" Option "CoreKeyboard" Option "XkbRules" "xorg" Option "XkbModel" "pc105" Option "XkbLayout" "de" EndSection # Konfiguration fÃŒr Thinkpad Synaptic Mittelknopf Section "InputDevice" Identifier "Configured Mouse" Driver "mouse" Option "CorePointer" Option "Device" "/dev/input/mice" Option "Protocol" "ImPS/2" Option "Emulate3Buttons" "true" Option "EmulateWheel" "true" Option "EmulateWheelButton" "2" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Identifier "Synaptics Touchpad" Driver "synaptics" Option "SendCoreEvents" "true" Option "Device" "/dev/psaux" Option "Protocol" "auto-dev" Option "HorizEdgeScroll" "0" EndSection Section "InputDevice" Driver "wacom" Identifier "stylus" Option "Device" "/dev/input/wacom" Option "Type" "stylus" Option "USB" "on" # Option "ForceDevice" "ISDV4"# Tablet PC ONLY EndSection Section "InputDevice" Driver "wacom" Identifier "eraser" Option "Device" "/dev/input/wacom" Option "Type" "eraser" Option "USB" "on" # Option "ForceDevice" "ISDV4"# Tablet PC ONLY EndSection Section "InputDevice" Driver "wacom" Identifier "cursor" Option "Device" "/dev/input/wacom" Option "Type" "cursor" Option "USB" "on" # Option "ForceDevice" "ISDV4"# Tablet PC ONLY EndSection Section "InputDevice" Driver "wacom" Identifier "pad" Option "Device" "/dev/input/wacom" Option "Type" "pad" Option "USB" "on" # USB ONLY EndSection Section "ServerLayout" Identifier "Default Layout" screen 0 "Default Screen" 0 0 Inputdevice "Generic Keyboard" Inputdevice "Configured Mouse" # Uncomment if you have a wacom tablet - gemacht InputDevice "stylus" "AlwaysCore" InputDevice "cursor" "AlwaysCore" InputDevice "eraser" "AlwaysCore" InputDevice "pad" "SendCoreEvents" Inputdevice "Synaptics Touchpad" EndSection Section "Module" Load "glx" Load "GLcore" Load "v4l" EndSection Section "device" # Identifier "device1" Boardname "ati" Busid "PCI:1:0:0" Driver "ati" Screen 1 Option "MergedFB" "off" EndSection Section "ServerFlags" EndSection -- LIST OF DEVICES -- /dev/input/ drwxr-xr-x 2 root root 80 2008-04-18 11:10 by-id drwxr-xr-x 2 root root 200 2008-04-18 11:10 by-path crw-rw---- 1 root root 13, 64 2008-04-18 11:10 event0 crw-rw---- 1 root root 13, 65 2008-04-18 11:10 event1 crw-rw---- 1 root root 13, 66 2008-04-18 11:10 event2 crw-rw---- 1 root root 13, 67 2008-04-18 11:10 event3 crw-rw---- 1 root root 13, 68 2008-04-18 11:10 event4 crw-rw---- 1 root root 13, 69 2008-04-18 11:10 event5 crw-rw---- 1 root root 13, 70 2008-04-18 11:11 event6 crw-rw---- 1 root root 13, 71 2008-04-18 11:11 event7 crw-rw---- 1 root root 13, 72 2008-04-18 11:11 event8 crw-rw---- 1 root root 13, 63 2008-04-18 13:10 mice -- TRACKPOINT + TOUCHPAD crw-rw---- 1 root root 13, 32 2008-04-18 13:10 mouse0 crw-rw---- 1 root root 13, 33 2008-04-18 11:10 mouse1 crw-rw---- 1 root root 13, 34 2008-04-18 11:10 mouse2 crw-rw---- 1 root root 13, 35 2008-04-18 11:10 mouse3 lrwxrwxrwx 1 root root 6 2008-04-18 11:10 wacom -> event3 /dev/input/by-id lrwxrwxrwx 1 root root 9 2008-04-18 11:10 usb-Tablet_PTZ-630-event-mouse -> ../event3 lrwxrwxrwx 1 root root 9 2008-04-18 11:10 usb-Tablet_PTZ-630-mouse -> ../mouse1 /dev/input/by-path lrwxrwxrwx 1 root root 9 2008-04-18 11:10 pci-0000:00:1d.1-usb-0:1:1.0-event-mouse -> ../event3 lrwxrwxrwx 1 root root 9 2008-04-18 11:10 pci-0000:00:1d.1-usb-0:1:1.0-mouse -> ../mouse1 lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-i8042-serio-0-event-kbd -> ../event1 -- KEYBOARD lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-i8042-serio-1-event-mouse -> ../event4 -- TOUCHPAD lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-i8042-serio-1-mouse -> ../mouse2 -- TOUCHPAD lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-i8042-serio-2-event-mouse -> ../event5 -- TRACKPOINT lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-i8042-serio-2-mouse -> ../mouse3 -- TRACKPOINT lrwxrwxrwx 1 root root 9 2008-04-18 11:10 platform-pcspkr-event-spkr -> ../event2 -- Friedenstr. 58 10249 Berlin Deutschland Tel +49 30 42020091 Mob +49 162 6843570 jmmmpais at googlemail.com skype: jmmmpjmmmp http://www.puredata.org/Members/jmmmp IBM Thinkpad R51, XP, Pd-Ext-0.39-2-t5, Pd Van 0.40-t2

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GEM - questions about cpu/gpu performance for installation
by Jaime Oliver 24 Apr '08

24 Apr '08

Hello all, I am making a patch for an installation using GEM and have several questions regarding image processsing. The 'visual' patch consists of many GL polygons (expecting about a 1000 per computer) over which I am texturing images. The basic building blocks (abstractions) are: gemhead | color | pix_buffer_read | pix_texture | pix_coordinate | alpha | polygon -Right now, my computer (old powerbook OSX 10.4.11 - one processor, built-in graphics (ATY,RV360M11 it claims)) displaying at 1280 * 960, with 23 polygons being rendered at 30fps and nothing else being done in pd, claims to be using 13-17% of the CPU, but it doesn't seem to display correctly ('slow') + it becomes a bit unresponsive ('slow'). -A collaborators newer 'macbook' (not pro, but still 2 processors), with built-in intel GMA 950 gfx card, claims to be using 95-100%(completely incoherent), and is also unresponsive('slow'). Anyway, the instalation will probably run in linux desktops so i am trying to define the architecture a bit. => SO: these are some questions i can't really answer right now, but i believe would shed light on the issues: 1- Which parts of this process (or image processing in general) are done by the CPU, and which by the GPU? 2- shouldn't a two processor machine increase the performance in a GEM Patch by default: display in one and process in the other??? 3- How much and/or in what ways would the performance of the program increase if I had a better graphics card? What features should I be looking for in a card? all suggestions/comments are welcome.... best, J -- Jaime E Oliver LR joliverl(a)ucsd.edu www.realidadvisual.org/jaimeoliver www-crca.ucsd.edu/ www.realidadvisual.org 9168 Regents Rd. Apt. G La Jolla, CA 92037 USA

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Peeking at a WAV file's headers?
by Ken Restivo 24 Apr '08

24 Apr '08

I've built a little patch to read and play stereo WAV files, but soundfiler crashes PD completely and exits if I open a mono WAV file. I'm using "read -resize $1 testsampleL testsampleR" to read into two arrays. Is there some way in PD to conditionally peek at the WAV header, so that I can do that first and only open the file if it has 2 channels? -ken

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EU + USA tour!
by Chris McCormick 24 Apr '08

24 Apr '08

Hello, (apologies if you recieve this more than once) My wife and I are doing a tour of Europe (in a campervan) and the USA starting at the end of August and I'm trying to organise some gigs for myself. I'm counting on the help of you good folks of the Free Software music oriented lists! I hope you'll excuse the imposition. I've written up a bit of a bio[1] and you can download demo tunes from my music website - see the links below for a selection. Finally, I've put up a tour page on my music site, so please check it out if you're at all interested in having me play at your event or venue, and please feel free to forward this email to anyone you know who might book experimental electronic/dance music. Here is the tour information: <http://sciencegirlrecords.com/chr15m/page/tour> Please contact me off-list if you are interested. I will be updating the tour page with dates, as I get them. Thanks for your time. Best regards, Chris. [1] bio - <http://sciencegirlrecords.com/chr15m/page/bio> Tunes to sample: <http://sciencegirlrecords.com/chr15m/music/CD004/search_and_rescue.mp3> <http://sciencegirlrecords.com/chr15m/music/remixes/your%20love%20is%20like%…> <http://sciencegirlrecords.com/chr15m/music/CD005/Chris%20McCormick%20-%20A%…> <http://sciencegirlrecords.com/chr15m/music/CD003/ergotchitecture.mp3> <http://sciencegirlrecords.com/chr15m/music/CD002/chr15m%20-%20soba%201978.m…> <http://sciencegirlrecords.com/chr15m/music/CD001/Chris%20McCormick%20-%20Po…> <http://sciencegirlrecords.com/chr15m/music/CD001/Chris%20McCormick%20-%20Du…> ------------------- http://mccormick.cx

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Re: [PD] Cyclone in vanilla?
by Matt Barber 24 Apr '08

24 Apr '08

I think the one-sample delay is given by [rzero_rev~ 0] -- (y[n] = -a[n] * x[n] + x[n-1]) -- but [z~] takes an argument for any delay by sample. Also, using a filter to achieve the delay might be putting the cart before the horse in pedagogical situations -- here [fexpr~] is probably better, but its maximum delay is the current vector length, and to me it feels somewhat expensive in production situations. Another option for something like [z~] that might integrate better with delay representation in pd could be an object that simply reads from [delwrite~] like [delread~] and [vd~], but whose argument is a sample-wise delay -- however, this is easily done via an abstraction. This would obviate the need for each instance to have its own internal delay allocation which could be useful for someone who wanted to use it to build something like a several-hundred-point direct convolution patch. Still, if others are used to the [z~] in zexy, it might be better to go with that model if it's going to be implemented in vanilla. Thanks, Matt > Date: Wed, 23 Apr 2008 13:17:40 -0700 > From: Miller Puckette <mpuckett(a)imusic1.ucsd.edu> > Subject: Re: [PD] Cyclone in vanilla? > To: pd-list(a)iem.at > Message-ID: <20080423201740.GI15867(a)imusic1.ucsd.edu> > Content-Type: text/plain; charset=us-ascii > > I believe z~ is just rzero~ 0. > > cheers > Miller > > On Wed, Apr 23, 2008 at 11:24:34AM +0200, Frank Barknecht wrote: > > Hallo, > > Matt Barber hat gesagt: // Matt Barber wrote: > > > > > Actually, for those of us who insist on vanilla and do everything with > > > expr/expr~/fexpr~ or abstractions, is it possible to implement [z~] in > > > fexpr~ for a delay larger than its vector size? You could do it with > > > an abstraction using [delwrite~] and [delread~], setting the [block~] > > > to 1, and then set the delay as a ratio to the [samplerate~] -- the > > > difficulty in making it work correctly here is setting the size of the > > > [delwrite~] efficiently (this could maybe be done with a loadbang > > > routine that would send a message to a subpatch in the abstraction > > > instance to add and connect a delwrite~ with the proper delay > > > allocation...). > > > > You don't need to set the block~-size to 1, and personally I would > > just make the delwrite~ "big enough". It's cheap to store things in a > > delay. But anyway, attached is a z~-clone with delwrite~/delread~ that > > uses a helper abstraction created dynamically. > > > > Ciao > > -- > > Frank Barknecht _ ______footils.org__ > > > > > > _______________________________________________ > > PD-list(a)iem.at mailing list > > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list >

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Pd-list April 2008