Pd-list August 2001

pd-list@lists.iem.at

47 participants
85 discussions

help! my patch breaks pd!
by Greg Rippin 24 Aug '01

24 Aug '01

Hello all, I have been working for some time on a patch that does a realtime harmonic analysis of an incoming MIDI stream and constructs probability tables for creating second-order markov chains based on the input. The patch is fairly large and complex; the probability calculating abstraction (fairly small in itself) is called 13x13x13 times. Recently, pd has occasionally died when I try to open this patch, but I could get it to open after a few failed attempts. Now, quite suddenly, it won't open at all; pd generates an invalid page fault whenever I try to load this patch. It opens all other patches without trouble. Most puzzling to me is that I haven't actually made any changes to the patch; I added some comments to the abstractions that are called by the parent patch, but made no functional changes immediately before this started to happen. I thought that perhaps the file was corrupt; I rebuilt the patch from it's constituent parts, it worked perfectly. I saved it under a different filename, closed it, tried to reopen it, and got the same error message. I even checked my resource meters, and nothing (memory, etc.) seems to dip when trying to open this patch. I'm stumped. What could I have done wrong to cause behavior like this? I'm running pd .33 patch 1 with the iemlib extensions on win 98. The error message I get is: PD caused an invalid page fault in module PD.DLL at 015f:10046e98. Registers: EAX=00960008 CS=015f EIP=10046e98 EFLGS=00210293 EBX=00000150 SS=0167 ESP=0063da90 EBP=0063dab0 ECX=00962838 DS=0167 ESI=00000013 FS=0fbf EDX=0309f00c ES=0167 EDI=00000014 GS=0000 Bytes at CS:EIP: 8b 49 04 89 4a 04 8b 4d f0 8d 0c f9 89 4a 08 89 Stack dump: 03100df0 00000200 0309f050 00000000 00962798 00000150 0309f00c 00000040 00960138 10042d20 00960138 00000003 03100df0 0309f050 00000110 00000200 Any help is greatly appreciated, Greg -- Greg Rippin, Graduate Assistant Music Technology Program New York University 35 West 4th Street, Suite 777 New York, NY 10012 phone 212-998-5422 fax 212-995-4043 musictechgrad.info(a)nyu.edu www.nyu.edu

4 11

another newbie question
by Nano Rosas 24 Aug '01

24 Aug '01

Hi list Here it's a new newbie kind of question which is the best way of making an audio signal to a control one. I mean, it must be a better way than using the snapshot~ with a metro objetc, no? By the way, what does the osc~ right inlet? Thanks to all

4 3

soundfiler and raw files
by Gregorio García 24 Aug '01

24 Aug '01

Hi list, Im trying to read raw data files using soundfiler obj but get this unwanted bahaviour: The files (generated in matlab), are supposed to be 'ieee-float32' and contain 515 32-bit floating point numbers. Im trying to read the data to an array using soundfiler, sending read to it with the following options: read - raw 0 1 4 l (0 as matlab says nothing about header data 1 for one channel 4 for 32 bit l for little endian) this reports an error message: unknown or bad header format When i change header size from 0 to 1, soundfiler reads the array but the data isnÅ½t correct (the data in the attached file is supposed to contain the dta for sin^2 from 0 to pi). I get similar behaviour with headersize 2 to 99 When i set headersize to 100 (ie read -raw 100 1 4 l) the data read suddenly becomes correct, but the first 26 floats in the file are missing in the array. What am i doing wrong? How can i get it to work? If the file format is inconvenient for soundfiler to read could anyone suggest some other format (matlab can generate a range of standard platform independent formats.) The data in the files is intended to be used as wavetables in pd: is there a more convenient method for reading files it into arrays? amy other suggestions? PD: the attached binary file was generated in matlab for windows (with fwrite), and is supposed to contain 515 32bit littleendianness floats representing a sin^2 function from 0 to pi, padded with one 0 at the beginning and two 0s at the end. thnks.

6 8

[tilmonen@cc.hut.fi: [linux-audio-dev] Announce: GIVERTCAP - capability handler (fwd)]
by Frank Barknecht 23 Aug '01

23 Aug '01

Maybe that's something cool for PD, as well? ----- Forwarded message from Tommi Ilmonen <tilmonen(a)cc.hut.fi> ----- Date: Wed, 22 Aug 2001 19:53:43 +0300 (EET DST) From: Tommi Ilmonen <tilmonen(a)cc.hut.fi> To: lad2 <linux-audio-dev(a)music.columbia.edu> Subject: [linux-audio-dev] Announce: GIVERTCAP - capability handler (fwd) [This is a resend, it seems my first attemp did not get there] Hello. GIVERTCAP is a small Linux application that is used to give other application real-time capabilities. With the aid of givertcap you can run real-time applications (audio and video -processing apps for example) with high priority without running the application as root. Your application does get a collection capabilities that allow it to run at very high priority. Givertcap was created to overcome the lack of capability support in Linux file systems. Once the Linux file systems start to have the necessary functions themselves, this apps becomes unnecessary. To use this app you need to compile it and make it setuid-root. After this other applications can use this mini-app to gain capabilities that are necessary for real-time operation. The home page: http://www.tml.hut.fi/~tilmonen/givertcap/ Please comment (!) Tommi Ilmonen ----- End forwarded message ----- -- __ __ Frank Barknecht ____ ______ ____ __ trip\ \ / /wire ______ / __// __ /__/ __// // __ \ \/ / __ \\ ___\ / / / ____/ / / / // ____// /\ \\ ___\\____ \ /_/ /_____/ /_/ /_//_____// / \ \\_____\\_____\ /_/ \_\

1 0

list wonkiness
by Nik 22 Aug '01

22 Aug '01

hi,. ive been modifying a version of ggee unwonk object (to tokenize a space seperated string + output the result as a list) and have noticed some strange (to me at least) behaviour. the following function gives the same value for argc whether the input is a list, or if it is a single string with elements seperated by spaces. im not really clear how pd handles lists, but i assumed argv is a pointer to a 'list' of atoms, which has argc number of elements? static void slonk_slonk(t_slonk *x, t_symbol *s, int argc, t_atom *argv) { t_atom *ap; t_slonkout *u; int i; int margc = argc; post("slonk: how long? %d", argc); if (argc > x->x_n - 1) margc = x->x_n - 1; if (argc - margc > 0) { ap = argv; u = x->x_vec + margc; outlet_list(u->u_outlet,0,argc, ap); } } so, if i send this object two messages slonk "0.4 0.34 1 0.11 8.33" and slonk 0.4 0.34 1 0.11 8.33 and the output is like this -> slonk: how long? 5 -slkn: list "0.4 0.34 1 0.11 8.33" slonk: how long? 5 -slkn: 0.4 0.34 1 0.11 8.33 maybe this isnt really the best way to do it, so the next question is is there a better way to acomplish this? nk

1 0

list wonkiness
by Nik 22 Aug '01

22 Aug '01

1 0

FFTease anyone?
by Michal Seta 22 Aug '01

22 Aug '01

Hi all. Anyone porting FFTease to PD these days? ./MiS

1 0

Re: [PD] -alsadev flag?
by vanDongen/Gilcher 21 Aug '01

21 Aug '01

>Can someone tell me the argument format needed by the alsadev flag? > >Thanks, > >Nick > I use -alsadev hw:0,0 or hw:0,1 giving the first or second device on the first card. (start counting at 0) This is the format for the new alsa 0.9, to directly pick a card, any card :) There are also ways to define names for your audio devices, and I think even names for groups of devices. This is done using a .alsarc or something which I don't quite understand. There is some vague documentation on it in the alsa distribution. Gerard

3 2

Re: Here comes everybody (video controlled with pd)
by Juha Vehviläinen 21 Aug '01

21 Aug '01

oh, asynchronous socket error is part of the deal for now. You get it if you close pd before framestein. Not too dangerous but would be nice to get rid of. > asynchronous socket error...

1 0

using mysterious list pseudo-object -- unwise?
by Krzysztof Czaja 21 Aug '01

21 Aug '01

hi, I suspect many Pd users know of undocumented 'list' pseudo-object. This is not an object per se, but anyway passing list selector with exactly one argument to the 'newclass object' _works_ and can be useful. But should I treat this as black magic or a legal construct and is it going to stay in Pd for good? Why it can be useful? Consider [list $1] -> [route float] in an abstraction which could thus accept both float and symbol values of the same abstraction argument (well, [makefilename $1-dummy] accepts different types also, but converts them to symbols). Why this works? There is no 'list' class defined in Pd => 'newclass' has no list method => default list method is used, which treats one-argument lists as symbols or floats => symbol or float object is created. So [list hot] is simply [symbol hot] and [list 40] is equivalent to [float 40] (or [40] for that matter). What the future holds? Will this proxy transform into list object proper -- a storage place for lists as zexy's lister (there is no such in max, but at least max value object can be of any type). Or is this little trick to be blocked altogether. Krzysztof (and I could be simply out of my wits, this is really a hot day...)

1 0

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Pd-list August 2001