Pd-list January 2009

pd-list@lists.iem.at

140 participants
197 discussions

Question about list-abs
by Mike McGonagle 17 Jan '09

17 Jan '09

I was looking through some of the list-abs objects, and short of going through each one, I was hoping to find an object that converts a stream of objects (floats and symbols), and outputs a list of the collected items when a bang is received. I am not really sure what this might be called, and the names aren't always obvious for what they do... Thanks, 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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Seamless playback, now with demo patch
by Florian Hollerweger 17 Jan '09

17 Jan '09

Hi again, This little demo patch illustrates seamless recording as well as the suggested [z~]-hack for seamless playback: best, flo.H #N canvas 0 0 918 623 10; #X obj 132 338 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 76 464 readsf~; #X obj 132 518 readsf~; #X msg 36 410 1; #X msg 122 491 1; #X obj 67 582 dac~; #X msg 76 410 open test1.wav; #X obj 355 67 loadbang; #X msg 49 170 stop; #X obj 110 180 osc~ 220; #X msg 215 170 stop; #X obj 26 217 writesf~; #X obj 192 217 writesf~; #X obj 145 71 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X msg 26 143 open test1.wav \, start; #X msg 192 143 open test2.wav \, start; #X obj 145 106 del 2000; #X obj 215 106 del 4000; #X obj 67 503 *~ 0.2; #X obj 132 545 *~ 0.2; #X obj 36 373 del 500; #X obj 132 582 writesf~; #X msg 355 94 \; pd dsp 1; #X msg 336 518 start; #X msg 195 545 stop; #X msg 132 437 open test2.wav; #X msg 205 518 open merged.wav; #X text 94 374 Give soundfile time to load; #X text 13 16 (A) Seamless recording of two (16 bit) files works fine (which one can see and hear when merging test1.wav and test2.wav e.g. with 'sox test1.wav test2.wav merged.wav'):; #X text 8 269 (B) But seamless playback does not work: recording the result to a file 'merged.wav' and inspecting it in an audio editor yields a gap of exactly one audio block at the transition point (64 samples if Pd's standard blocksize is used):; #X obj 633 112 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 577 238 readsf~; #X obj 633 292 readsf~; #X msg 537 184 1; #X msg 623 265 1; #X obj 508 356 dac~; #X msg 577 184 open test1.wav; #X obj 509 280 *~ 0.2; #X obj 633 319 *~ 0.2; #X obj 537 147 del 500; #X obj 633 356 writesf~; #X msg 837 292 start; #X msg 706 319 stop; #X msg 633 211 open test2.wav; #X obj 509 253 z~ 64; #X obj 509 226 readsf~; #X text 476 32 C) A seamless playback hack with zexy's [z~]: At the cost of an additional [readsf~] object \, we delay playback of the first file by 64 samples using zexy's [z~] \, and use the original (undelayed) [readsf~] only for the 'playback done' bang at its right outlet. This allows for seamless playback.; #X msg 706 292 open merged.wav; #X connect 0 0 6 0; #X connect 0 0 25 0; #X connect 0 0 20 0; #X connect 0 0 26 0; #X connect 1 0 18 0; #X connect 1 1 4 0; #X connect 2 0 19 0; #X connect 2 1 24 0; #X connect 3 0 1 0; #X connect 4 0 2 0; #X connect 6 0 1 0; #X connect 7 0 22 0; #X connect 8 0 11 0; #X connect 9 0 11 0; #X connect 9 0 12 0; #X connect 10 0 12 0; #X connect 13 0 14 0; #X connect 13 0 16 0; #X connect 13 0 17 0; #X connect 14 0 11 0; #X connect 15 0 12 0; #X connect 16 0 8 0; #X connect 16 0 15 0; #X connect 17 0 10 0; #X connect 18 0 5 0; #X connect 18 0 5 1; #X connect 18 0 21 0; #X connect 19 0 5 0; #X connect 19 0 5 1; #X connect 19 0 21 0; #X connect 20 0 3 0; #X connect 20 0 23 0; #X connect 23 0 21 0; #X connect 24 0 21 0; #X connect 25 0 2 0; #X connect 26 0 21 0; #X connect 30 0 36 0; #X connect 30 0 43 0; #X connect 30 0 39 0; #X connect 30 0 47 0; #X connect 31 1 34 0; #X connect 32 0 38 0; #X connect 32 1 42 0; #X connect 33 0 31 0; #X connect 33 0 45 0; #X connect 34 0 32 0; #X connect 36 0 31 0; #X connect 36 0 45 0; #X connect 37 0 35 0; #X connect 37 0 35 1; #X connect 37 0 40 0; #X connect 38 0 35 0; #X connect 38 0 35 1; #X connect 38 0 40 0; #X connect 39 0 33 0; #X connect 39 0 41 0; #X connect 41 0 40 0; #X connect 42 0 40 0; #X connect 43 0 32 0; #X connect 44 0 37 0; #X connect 45 0 44 0; #X connect 47 0 40 0;

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Seamless playback of two audio files?
by Florian Hollerweger 17 Jan '09

17 Jan '09

Hi list, A while ago, we have been discussing seamless (i.e. click-free) recordings of two consecutive audio files using [writesf~]. For the record, let me summarize that seamless recording of two files is generally possible, also _without_ delaying the start/stop messages to the next block boundary through [bang~]. However, it fails for 24 bit files, the reason for which seems to be yet unknown. Now, I have a question regarding seamless _playback_ of two files (which I know have been recorded seamlessly): When I use the right outlet of my first [readsf~] to trigger playback of the second file, I get a gap of exactly one block (i.e. 64 samples using Pd's block size). The only hack I can think of so far is to use two [readsf~] objects for the first file: one for playback, which is delayed by 64 samples using zexy's [z~], and another (undelayed) one for the bang at the right outlet. The obvious drawbacks are the introduction of a one-block delay, and the overhead created by the additional [readsf~] object. Does anybody have a different idea of how seamless playback of two files could be achieved in Pd? Thanks for your contributions, flo.H

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list2sysex (was Re: sysex2list)
by Alex 17 Jan '09

17 Jan '09

Oh, so I've also made one that takes a list and converts it into a stream of bytes with a sysex start byte as the first output and a sysex end as the last output. I've attached it as well... it doesn't do any error checking yet.. but it has been useful for me :) -Alex On Fri, Jan 16, 2009 at 7:26 PM, hard off <hard.off(a)gmail.com> wrote: > yeah cheers. may be useful for me with a project i am working on. > > >

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change the length of looped soundfile without audio-clicks
by Marko Timlin 17 Jan '09

17 Jan '09

Hallo Frank, Hi pd-list, hhhmmm...sorry I guess my explanation was not very precise. I studied the pd-example-patches Frank mentioned but [samphold~] has a big disadvantage: if we change a start or stop point of a loop-playback, then this change will be executed only after each cycle of the [phasor~](thus when it jumps from 1 to again). But if we work with long soundfiles and want to change their length "on the fly"- from long loop length to short loop length for instance - then [samphold~] can*t do what we want. So my question is: How is it possible to change in real-time the start and stop position of a soundfile in loop mode without getting audible audio clicks. Any other ideas, suggestions??? MArko Hallo, Marko Timlin hat gesagt: // Marko Timlin wrote: > Hi Ben, hi pd-list > I just studied Ben's [susloop~] object and I have one questions. > How is it possible to change the start and stop position of a soundfile in loop mode without getting audible audio clicks. How can you do that? > > I'm just developing my own soundfile-player and I have the problem that whenever I change the start and/or stop position in real-time I get a short audible audio click whenever [tabread4~] "jumps" to the new position. > In my patch [phasor~] is multiplied with the amount of samples the soundfile has and reads like that through the soundfile using [tabread4~]. One popular approach is to use [samphold~] to only set the new limits whenever the phasor~ jumps anyway. The samplers in 3.audio.examples and Miller's book contain lots of examples of this approach. Ciao -- Frank _______________________________________________ Pd-list(a)iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list

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sysex2list
by Alex 17 Jan '09

17 Jan '09

I'm about to make an editor for a synthesizer I have which sends all of its parameters via sysex messages [the Dave Smith desktop evolver]. In order to deal with these messages simply, I've written a little abstraction which parses sysex messages and makes them into lists. I've attached it here in case anyone else might find it useful. Enjoy, Alex

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Pd, Arduino, and Multiple LED's == Installation?
by Kyle Klipowicz 16 Jan '09

16 Jan '09

Hello Listers~ I'm working on an art gallery installation and I want to use Pd to control some high-powered LED's via an Arduino unit. The breakdown is this: I need to create a series of RGB LED's that will provide accent illumination to the gallery space, and shifts from red to blue over a course of 6 weeks. The program isn't very difficult to write. I've already decided to link it to the system date/time so that the installation can be powered down easily at night. What's tricky is knowing what hardware to use and how to get it together. I am going to want between 25-100 lights at minimum, possibly more. I've looked at a few sites and links already, especially the Arduino site. They have some things related to DMX lights, and this is something I've seen a bit on the list as well. I don't know if this is a good solution or if it is overkill for what I want to do. One piece of hardware that seems promising is the ShiftBrite ( http://www.macetech.com/blog/node/54). Does anyone know about this? I know this might be considered off-topic, but I'd really appreciate it if any seasoned veterans could throw me some tips. I'll be exploring other areas, but I know there are some honed brains skimming these emails so maybe they can drop some science on me. Thanks in advance, ~Kyle -- ----- ------------ ---- ----- ---- -------- - ------ http://perhapsidid.wordpress.com http://myspace.com/kyleklipowicz

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issues installing pd-ext on ubuntu intrepid 868
by João Pais 15 Jan '09

15 Jan '09

Hi, I had several topics about compiling pd-ext (latest night build) on my 686 desktop: - is it possible to add a line to INSTALL.TXT saying that ubuntu users must install tcl/tk-dev, and *not just* tcl/tk? That saves time and pacience from checking the list. (same applies also to pd van) - it would be also good that this file indicates which tcl/tk version is suitable to use with pd. I assumed the most actual version would be good, so I installed tcl/tk 8.5. Although it did build etc, when I try to run pd it complains that /usr/local/lib/pd/bin/pd-gui: error while loading shared libraries: libtk8.4.so.0: cannot open shared object file: No such file or directory which I guess it means that tcl/tk 8.4 is necessary - that said, I uninstalled tcl/tk-dev 8.5 and installed tcl/tk-dev 8.4. But the same message still appears, so now I don't understand what's the problem. libtk8.4.so.0 is at /usr/lib, so why can't pd find it? (looking for libtk8.4.so.0 in the pd-list didn't bring much) - and after correcting this problem, is it possible to mention it in the INSTALL.TXT file? The bottom line is, I think I still remember these issues (or similar ones, now I'm not sure) some years ago when I was trying to work with linux. And all that time later, they're still there. If they're "features" and are here to stay, it would be good to warn users upfront about it. Another thing: any suggestions on how to setup the computer to have pd-ext and pd-van compiled at the same time? In windows is really easy, I just say which folder I want it to be, and all the files stay there, aren't distributed around the computer. How is it possible to make that the common files between both versions aren't overwritten? (or are common files also similar to one other?) Thanks, Joao -- Friedenstr. 58 10249 Berlin (Deutschland) Tel +49 30 42020091 | Mob +49 162 6843570 jmmmpais(a)googlemail.com | skype: jmmmpjmmmp http://www.puredata.org/Members/jmmmp IBM Thinkpad R51, XP, Ubuntu II | Pd-Ext-0.40.3

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PDa on palmTX
by a. tonal 15 Jan '09

15 Jan '09

i installed reware on my palmTX and it runs nicely. i have an external microphone-port on the TX which allowes me to record into PalmOS application. but when i run PDa under reware i cannot use adc~. i just get direct input to output, even without PDa running. the Audio Mixer app doesn't seem to support a mic-input. has anybody a solution for this? another question: how can i emulate a right mouse click to reach the contextmenu for PDa object-properties on the TX? the same for shift-click to enter float values in a numberbox. olli _________________________________________________________________ http://redirect.gimas.net/?n=M0901xMMe_DE Minimize-Me: Gestalte dein eigenes Messenger Anzeigenbild!

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[PD-announce] netpd is down
by Roman Haefeli 15 Jan '09

15 Jan '09

hi all although most of the users are not lurking on the list, i post it here anyway: the netpd server (the machine, not the service) is currently down due to harddisk failure. i hope to be able to fix it in the next (hopefully) days or (hopefully not) weeks. roman ___________________________________________________________ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Pd-list January 2009