Pd-list December 2000

pd-list@lists.iem.at

29 participants
20 discussions

RE: performance in pd - audiobuf, etc
by d d 11 Dec '00

11 Dec '00

Hello I'm not sure what you mean by 'no latency' Low latency I can understand :) In Win2K are you setting audiobuf? Once I go below 80 or so, performance is unstable I'm hoping to get 3-9 msec latency (which would mean setting audiobuf below 10, something that all machines i've tested on can't do) As far as a test patch, all I'm doing is routing adc~ straight to dac~ ! And I get unusable latency (for realtime audio processing) If you ran say a preamped mic into some software (we'll say cooledit) and at the same time ran the same signal into and then out of PD (then that signal into cooledit) you'd have (on all my tested systems) a lot of latency between the two. Thanks so much for the help My echo layla interface has ASIO / ASIO 2.0 drivers, but that doesn't seem to help The processor is definately up to par, I guess that just leaves win2K as the culprit for bad latency? -daniel > > Perhaps you could dual boot to Linux? I don't have any latency data for >PD >on Win2000, but if you'd like to write a latency test patch, I could run it >on my system and send you the results? > > I've wanted to test this since applying the kernel low-latency patch, and >have never gotten around to it. > > I have an Athlon 600, 64MB Ram, Redhat 6.2, Kernel 2.2.16 with the >low-latency patch. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

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Re: PD 32 for linuxppc
by Gabriel Suerte 11 Dec '00

11 Dec '00

I normally run MacOS on my G3 (233MHz beige desktop), but your PPC build seems to work fine under LinuxPPC-1999Q3 (2.2.6-15 kernel) using the built-in audio (with "-frags 4 -fragsize 11" flags). I'd also be interested in trying to get ALSA to work. Which version of the drivers sports the API most compatible with Pd in Intel-land? --Gabriel [karlmac(a)peabody.jhu.edu, 12/08/00]: >I've put a linuxppc version of pd-032 up at >http://mambo.peabody.jhu.edu/~karlmac/download for anyone who is >interested. It is fairly well tested but not garuntees. Most likely you >will have to specify -frags n to get it to work with the built-in >sound. Hopefully I will get alsa to work on my G4 soon so that I can test >full duplex (the only extra card I have is only full duplex with >alsa). Is anyone else using linuxppc?

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plugin~ crashes on free
by Andrew Archibald 09 Dec '00

09 Dec '00

Hi, I am attempting to use the plugin~ object to load LLADSPA plugins. Unfortunately, it crashes every time PD attempts too free it. Through a suitable application of printfs, it seems each object gets the "free" function (plugin_tilde_free) called twice. Naturally, this causes a crash. Is there some documentation on the PD externals interface? All I have found are some examples, which do not allow me to determine why a free function might get called on the same object more than once... Thanks, Andrew

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More MIDI, Spectral composition tool
by 2135 08 Dec '00

08 Dec '00

Dear pd folks! In old times with MAX I very often used the midi recorder object to get structures written into a MIDi Standard File, to get them into Finale to make instrumental music. Could somebody write a small MIDI recorder? The system exclusive messages were also very usefull in a lot of cases - sending via MIDIOUT - I hope this will be in pd as well, soon. I have worked with the Fiddle object lately, and I wonder how one could use this object or some other object as a tool for spectral composition. The idea would be to get some output - like say a MIDI file, that told me about partials, theíertime and frequency. Maybe the partial tracker should do the job, but I don't know how. Could somebody out there help me?

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mspdb60.dll
by Ricardo Climent 07 Dec '00

07 Dec '00

Hi Etan, VC6.0 seems to do the win32 compilation for externals ok, since the admin-guy copied mspdb60.dll onto ../VC98/bin Cheers, Ricardo ------------------------- On Thu, 7 Dec 2000 03:31:57 -0800 (PST) Etan Fisher <efishr(a)yahoo.com> wrote: # Hi Ricardo, # # Well, it seems the same problems are world-wide! # # I actually had to get ahold of the administrator in # order to copy the mspdb60.dll into one (or more) of # the directories. It must be something to do with the # Visual Studio properties. # # Use your previous makefile. # # Good Luck! # # Etan # # # __________________________________________________ # Do You Yahoo!? # Yahoo! Shopping - Thousands of Stores. Millions of Products. # http://shopping.yahoo.com/ _____________________ Ricardo Climent

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MIDI timing jitter?
by Gregorio García 06 Dec '00

06 Dec '00

Hi, Im new to this list and first of all I would like to congratulate the PD creators&mantainers for this marvelous experience Ive been having these last three days, undergoing the fantastic tutorials & building my first PDinstruments. This is what ive been looking for for years (i knew of MAX, but not for PC, and cmusic is fine but...). I´m running pd under WIN98 with a SB 64Gold and nothing was easier as installation. Audio works great (at least it did in the tutorial files), but when i started building my first (MIDI) instruments timing is really poor. In a simple scheme like the one in the tutorial for noteon object (noteon + metro) i can´t get a steady output. - My question is: Is it due to a pd timing problem under WIN98 (if i put up a counter it doesnt seem to update regularly either)? or maybe to MIDI driver problems. - Another question is how do i select the port to which midi messages will be directed? Thanks again for PD!!!!!!

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MIDI-jitter
by Johannes M Zmoelnig 06 Dec '00

06 Dec '00

hi all under win32 both the #key-receive and the MIDI-in seem to have ugly bad and disgusting jitter. how can i minimize this ? since i need audio, i cannot do less than 200ms audiobuf (on a PIII-733MHz !!!) because someone might hear this... does the "sleepgrain" option work on NT too ? (i have no possibility to check this here) it would be important to me to get any information soon as possible. mfg.dsgt IOhannes

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midi system exclusive Or midi raw message
by cmcmcmcmcm 06 Dec '00

06 Dec '00

Dear Sir, Is there any midi obect for sending midi system message or midi raw message in PD? If not, would you please tell me how to send and receive the following midi message (3 bytes): 240 46 247 Thank you very much. CM

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PD symbols with funny characters
by Andrew Archibald 05 Dec '00

05 Dec '00

Hi, I have installed plugin~[1] (for loading LADSPA[2] plugins) and the CMT[3] (a collection of LADSPA plugins), and am attempting to use the syndrum plugin (as a test). Unfortunately, this plugin has control inputs named "Frequency (Hz)" and "Frequency Ratio". This is a problem since the way plugin~ works is to expect messages of type "control" sent to its input, where the first argument is the name and the second is the number. So, to get to my question: Can I, in PD, construct symbols that have spaces in them? For example, can I construct a message whose fields are "control", "Frequency (Hz)", and "7"? Further details: plugin~ does a case-insensitive comparison, and it only compares as many letters as the minimum of the lengths, so I can specify "frequency" and it finds something; but I can't specify both "fequency ratio" and "frequency (hz)". I have checked and the symbol boxes available in PD accept tabs but not spaces or carriage returns. What will break if they allow spaces too? Do symbol boxes forget their values, as number boxes do? Thanks, Andrew Archibald [1]ftp://iem.mhsg.ac.at/pd/Externals/PLUGIN/plugin~-0.1.tar.gz [2]http://www.ladspa.org/ [3]http://www.ladspa.org/cmt/

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tcp to netreceive
by Dan Neveu 05 Dec '00

05 Dec '00

Hello, I'm essentially a c++ novice, so bare with me. I'm currently learning OpenGL on linux and would like to stream data to and from Pd. I'm aware of GEM, but would like to have the possibility of collaborating with those OpenGL programmers whom have no intention of learning Pd. There's also the possibility of incorporating it into a 3D Cave project being conducted by the media studies department here. I'm trying to utilize this class which I found (libtcp++) in order to provide tcp client capabilities to my GL code: http://www.sashanet.com/internet/download.html For now, I'm mainly determined to get the OpenGL-to-Pd connection working. So far, I've succeeded in creating the libtcp build, importing and instantiating a tcp_client object, and establishing a connection with Pd (netreceive outputs "1" upon execution of the graphic app). But I haven't figured out how to format the data in order for it to be received. The tcp_client send fuction is as follows: int TcpClient::send(char* data, int num_bytes) { return write(socket_fd, data, num_bytes); } ---------------- My call to 'send' is: net->send(data, sizeof(data)); //net is my instantiated tcp object based on this, I had to convert number data from the GL code to string before passing it. I tried both passing the data string alone (e.g. "49") as well as concatenating it with a name to be recognized by a Pd receive object (e.g. "foo 49"). What has to be reformatted in order for this to work? Thanks, Dan

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Pd-list December 2000