Pd-list October 2015

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55 participants
86 discussions

PdDroidParty needs a maintainer
by Chris McCormick 08 Oct '15

08 Oct '15

Hi all, PdDroidParty is an Android application for running Pd patches. It bundles libPd with some front-end code for rendering the non-editable parts of Pd's GUI. I no longer have a working build environment for Android on my machine and I think somebody else could do a better job at maintaining this project and hopefully moving it forward, bringing it into line with modern Android development practices etc. Cc-ing Antoine and Berenger as I thought you might be interested and/or know somebody. If anybody is interested, please let me know! Cheers, Chris. -- http://mccormick.cx/

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MIDI connection problem with commandline-parameters
by cornicis 08 Oct '15

08 Oct '15

Hi all, I have a strange problem since upgrading my Raspberry Pi 2 to Debian Jessie and PureData 0.46.7: MIDI stopped working on pd-startup by setting the commandline-parameters. In detail: An Arduino MIDI-Controller is connected via USB to the RPi2. No changes have been made to this, and MIDI send seems to work in ALSA. Some data to proof: $ ls /dev/midi* /dev/midi1 $ aconnect -l Client 0: 'System' [Typ=Kernel] 0 'Timer ' 1 'Announce ' Client 14: 'Midi Through' [Typ=Kernel] 0 'Midi Through Port-0' Client 20: 'Arduino Leonardo' [Typ=Kernel] 0 'Arduino Leonardo MIDI 1' Pressing buttons and listening: $ aseqdump -p 20 Waiting for data. Press Ctrl+C to end. Source Event Ch Data 20:0 Note on 1, note 45, velocity 64 20:0 Note off 1, note 45, velocity 64 20:0 Note on 1, note 45, velocity 64 20:0 Note off 1, note 45, velocity 64 [...] Hence my Raspberry gets the sent midi notes from the Arduino. However, starting puredata with "puredata -d 3 -verbose -nogui -alsamidi -midiindev 1 -listdev puredata/miditest.pd" won't get any MIDI input (miditest.pd is just printing incoming midi notes). $ puredata -d 3 -verbose -nogui -alsamidi -midiindev 1 -listdev puredata/miditest.pd audio input devices: 1. snd_rpi_hifiberry_dacplus (hardware) 2. snd_rpi_hifiberry_dacplus (plug-in) 3. Arduino Leonardo (hardware) 4. Arduino Leonardo (plug-in) audio output devices: 1. snd_rpi_hifiberry_dacplus (hardware) 2. snd_rpi_hifiberry_dacplus (plug-in) 3. Arduino Leonardo (hardware) 4. Arduino Leonardo (plug-in) API number 1 MIDI input devices: 1. ALSA MIDI device #1 MIDI output devices: 1. ALSA MIDI device #1 input channels = 2, output channels = 2 Pd-0.46.2 ("") compiled 07:48:11 Oct 29 2014 tried /home/pi/utzmachine/puredata/miditest.pd and succeeded priority 6 scheduling enabled. /usr/lib/puredata/bin/pd-watchdog Opened Alsa Client 128 in:1 out:0 By using "aconnect 20, 128" manually after Alsa-Client gets openend in PD I can connect the MIDI controller and get MIDI input printed: $ puredata -d 3 -verbose -nogui -alsamidi -midiindev 1 -listdev puredata/miditest.pd audio input devices: 1. snd_rpi_hifiberry_dacplus (hardware) 2. snd_rpi_hifiberry_dacplus (plug-in) 3. Arduino Leonardo (hardware) 4. Arduino Leonardo (plug-in) audio output devices: 1. snd_rpi_hifiberry_dacplus (hardware) 2. snd_rpi_hifiberry_dacplus (plug-in) 3. Arduino Leonardo (hardware) 4. Arduino Leonardo (plug-in) API number 1 MIDI input devices: 1. ALSA MIDI device #1 MIDI output devices: 1. ALSA MIDI device #1 input channels = 2, output channels = 2 Pd-0.46.2 ("") compiled 07:48:11 Oct 29 2014 tried /home/pi/utzmachine/puredata/miditest.pd and succeeded priority 6 scheduling enabled. /usr/lib/puredata/bin/pd-watchdog Opened Alsa Client 128 in:1 out:0 MIDI: 45 64 2 MIDI: 45 0 2 I tried various parameter combinations for -midiindev and even tried the new -midiaddindev but no success. This leaves me clueless, has any configuration changed? I'm compiling 0.46.7 right now and draw some hope from that (using these steps: http://lists.puredata.info/pipermail/pd-list/2014-11/108543.html), but I wonder why noone else seems to have this problem. I guess I missed something... Sorry for the extensive data, I hope it's helpful at least. Cheers, Daniel

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Playing Video with Audio
by Jim Ruxton 08 Oct '15

08 Oct '15

I am currently using the shell object to run mplayer to play video files that have sound . It works however I don't have much control over the video playback. Just wondering what methods other people use? Would I need to strip the soundtrack from the video and synchronize them to use Gem? Thanks. Jim

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percolate binaries
by Jeppi Jeppi 08 Oct '15

08 Oct '15

Hi all,I am looking for the last Percolate binaries (specifically, if available, for Win7 & Osx Mavericks). Has anyone compiled them for such platforms? It seems pretty old. The one I have for Osx states "wrong architecture" and won't load. Besides, any other woodwind physical model would do, but I didn't find anything else for Pd. Thanks in advancejosep

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Re: [PD] comport rxerrors on W10
by rolfm＠dds.nl 08 Oct '15

08 Oct '15

Microsoft has completely rewritten usbser.sys https://msdn.microsoft.com/en-us/library/windows/hardware/dn707976%28v=vs.8… maybe there's some meaningful info @martin a bit off topic (beside the comport errors) i have also a lot of problems in W10 to get Pd, Vanilla & extended, to work as i was used to. i cannot trace it back, but one of the things i did was to clean the windows register manually from every entry related to Pd, Pd-extended & PureData. another cause seems to be the use of 'deken'; because it introduces a reference to ../Application Data, which folder is not accessible. but, i have to find out more about it and eventually start another thread. rolf

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Re: [PD] PdDroidParty does not find any patches
by Chris McCormick 08 Oct '15

08 Oct '15

Hi Klaus, On 08/10/15 01:16, klaus wrote: > i have PdDroidParty running on my Galaxy A3, Android Version 5.0.2. > i put the test files from http://droidparty.net/ onto my sd card in a > folder called > PdDroidParty but the app does not find any patches. > > i only see a black screen with "PdDroidParty compatible patches found:" > "finding patches" is performed at startup but the screen stays empty. > i tried other locations for the pd-patches and naming the folder > differently according to my web-searches with no success. > i also tried on two different phones with the same result. I think you are right this is quite a common problem. Generally I have found it is solved for people using the app when they try the internal storage instead of the external SD card. Hopefully this can fix the problem for you. I have filed a bug/feature request on the PdDroidParty repository to make this work better so that a user can select where they would like the patches to be loaded from. https://github.com/chr15m/PdDroidParty/issues/25 I am not sure when this will get fixed as I do not currently have a working Android build environment and that is not high on my priority list right now. Sorry about that! Cheers, Chris. -- http://mccormick.cx/

1 0

readsf~ and writesf~, locking, blocking and real-time priority
by Robert Esler 07 Oct '15

07 Oct '15

I’m trying to understand why readsf~ and writesf~ work so well. I’m particularly referencing Ross Bencina’s article: http://www.rossbencina.com/code/real-time-audio-programming-101-time-waits-… and his subsequent paper, http://www.rossbencina.com/static/writings/File_IO_ACMC2014_Bencina.pdf If you are not into asynchronous message passing and lock-free queueing then I’ll summarize the articles briefly: When engaging in file I/O (e.g reading from or writing to an audio file) do not use locks or blocking. He goes on to say that this can lead to priority inversion, unbound execution time and “scheduler paranoia”. This is all absolutely true in my experience in the audio jungle. Pd’s async file I/O objects (readsf~ and writesf~) use both locks and blocking via a mutex and the pthread_cond_signal and pthread_cond_init functions. Look at the source code file d_soundfile.c for more details. The gist of it is that these objects have two threads. One parent thread that sends the data to the dsp scheduler, and a child thread that grabs the data from the file, and subsequently the child signals the parent when it has more data. Based on Bencina’s paper, readsf~ and writesf~ could (should?) glitch and may not be real-time safe. My questions are: 1) Have I completely misunderstood d_soundfile.c and it is actually entirely safe. If so, why is it safe? 2) Why doesn’t Pd glitch more often when using these objects? 3) Does Pd need lock-free message queueing for such inter-thread communication? 4) Has anyone ever “broken” these objects or experienced glitching? Thanks for the extra brain power. -R

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Re: [PD] comport rxerrors on W10
by rolfm＠dds.nl 07 Oct '15

07 Oct '15

thx Iohannes for looking into it. what i do to test it: in PD: [comport 3 9600] - [print] in Arduino: in setup:Serial.begin(9600) in loop: Serial.println("z"); delay(3000); more simple it cannot be, i thought. using the serial monitor of the Arduino IDE the z's are printed. Pd gives the RXerrors (10 of them). when i unplug the cable there's no reaction from [comport]. when i do [close( the following 3 lines are printed: [comport] ** ERROR ** couldn't reset params to DCB of device COM3 [comport] Couldn't reset old_timeouts for serial device [comport] closed COM3 IOhannes wrote: > note, that virtual serial-ports on the client are forwarded to network > on the host, so no actual serial hardware is involved. > it shouldn't make a difference for the client though. i'm not sure what this should tell me. my reasoning is that when my virtual XP doesn't have this problem, it's the combination of [comport] & W10 at fault. (the Arduino on it's own IDE works fine: driver and hardware are apparantly ok). IOhannes wrote: > i just tested [comport] on a virtual W10 (running on a Debian host), so your host is Debian, mine is W10. which tells what? rolf PS i installed a fresh copy of Pd-ext 43.4

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Re: [PD] comport rxerrors
by rolfm＠dds.nl 06 Oct '15

06 Oct '15

dear list, i'm repeating my question because i'm totally stuck. [comport] reports RXerrors when trying to connect to an Arduino over an USB com port. the Arduino IDE works without fail. it's on a new Lenovo with Windows 10. i cannot fall back on my old W7 computer because it crashed. needless to say that everything worked on W7, XP, MAC. anybody who has experience with this? any hint is very much appreciated. rolf

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Re: [PD] array-abs
by Christof Ressi 06 Oct '15

06 Oct '15

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Pd-list October 2015