Pd-list July 2003

pd-list@lists.iem.at

127 participants
191 discussions

about latency
by Alex 17 Jul '03

17 Jul '03

Hi, When I start up pd My version of portaudio tells me the latency I have: 46ms I have built a patch that records sound input on a tempo and I have noticed that my sound takes some times to get into pd. I have always thought that latency was the time the sound would put to get in then out but I thought that the sound would put something like 0.005ms to get in and a file played from the HD would put the same. So as I did not care about direct monitoring stuff, I did not mind. Recently I have recorded samples on a tempo generated in pd and when playing the samples back I have noticed that my samples were not synchronized with the tempo. Can somebody confirm me that the signal get some significant time before getting into pd ? Or else ? Also, I have then tried to play my samples a bit earlier than the tempo something like 89ms and then my samples where back on tempo. But 2 days later that 89ms became 130ms. (I used different patches) Can the in/output latency be variable according to the CPU I use ? Humm... Alex

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RE: [PD] FM problems
by Matthew Allen 17 Jul '03

17 Jul '03

If you set up z~ to be larger than 1 (like say 64 or whatever your block size is) does it still give you the error? Could you send your new patch to the list and I can try it here. m. > -----Original Message----- > From: matthijs(a)devdsp.net [mailto:matthijs@devdsp.net] > Sent: Thursday, July 17, 2003 11:57 AM > To: Matthew Allen > Cc: pd-list(a)iem.kug.ac.at > Subject: Re: [PD] FM problems > > 0.36 on Linux, with whatever version of Zexy comes with the PD externals > package on sourceforge. > > On Thu, Jul 17, 2003 at 11:33:53AM -0700, Matthew Allen wrote: > > Hmm, Its running here fine. > > > > What version of stuff are you running and on what system. I'm running > .36 at > > home and .37r5 here at work. Both with whatever the latest version of > zexy > > is. On win2k machines both places. > > > > m.

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RE: [PD] FM problems
by Matthew Allen 17 Jul '03

17 Jul '03

Hmm, Its running here fine. What version of stuff are you running and on what system. I'm running .36 at home and .37r5 here at work. Both with whatever the latest version of zexy is. On win2k machines both places. m. > -----Original Message----- > From: matthijs(a)devdsp.net [mailto:matthijs@devdsp.net] > Sent: Thursday, July 17, 2003 11:26 AM > To: Matthew Allen; pd-list(a)iem.kug.ac.at > Subject: Re: [PD] FM problems > > Actually, no, z~ 1 still causes a segfault. > > On Thu, Jul 17, 2003 at 08:22:32PM +0200, matthijs(a)devdsp.net wrote: > > Great! I guess I should rewrite the patch to use that instead (and take > > a closer look at exactly what is in that PD externals package ;) ) > > > > Thanks!

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RE: [PD] FM problems
by Matthew Allen 17 Jul '03

17 Jul '03

[z~ 1] z~ is an object from the zexy which I have used extensively in my FM patches for this reason. It allows you to define a delay in terms of samples not milliseconds. So the above object would delay the incoming signal by a single sample. This gives you much more predictable results than delaying the signal by a millisecond (441 samples) which at higher frequencys could be the entire period of your waveform. m. > -----Original Message----- > From: matthijs(a)devdsp.net [mailto:matthijs@devdsp.net] > Sent: Thursday, July 17, 2003 6:58 AM > To: pd-list(a)iem.kug.ac.at > Subject: [PD] FM problems > > Hi list, > > I was wondering if one of you could help me with a patch I'm working on: > > The patch (see attachment) attempts to implement a phase oscillation > instrument with feedback. The output of a phasor~ (the carrier) is added > to the output of an osc~ (the modulator) and the combined result is fed > into a cos~ object. > > This works perfectly. > > However, when I try to feed the output of the cos~ object, multiplied by > some value between 0 and 1, back into the chain somewhere and turn on > audio processing, PD immediately segfaults ("Consistency check failed: > signal_free"). > > So I guess I can't do this. Can anyone explain which obvious mistake I'm > making here? > > > -- > take care, > > Matthijs de Jonge > http://devdsp.net - news and resources for computer musicians

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FM problems
by matthijs＠devdsp.net 17 Jul '03

17 Jul '03

Hi list, I was wondering if one of you could help me with a patch I'm working on: The patch (see attachment) attempts to implement a phase oscillation instrument with feedback. The output of a phasor~ (the carrier) is added to the output of an osc~ (the modulator) and the combined result is fed into a cos~ object. This works perfectly. However, when I try to feed the output of the cos~ object, multiplied by some value between 0 and 1, back into the chain somewhere and turn on audio processing, PD immediately segfaults ("Consistency check failed: signal_free"). So I guess I can't do this. Can anyone explain which obvious mistake I'm making here? -- take care, Matthijs de Jonge http://devdsp.net - news and resources for computer musicians

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[OT] serial out to midi
by matthew s shanley 17 Jul '03

17 Jul '03

i'm running pd on a windows 2k laptop with no midi hardware. i would like to be able to use it to control external devices using midi signals (and perhaps at some point receive midi signals as well, but i'm not sure that would be possible concurrently). i would like to use the serial port to send midi signals out through. i have the hardware to make a wire with a serial connection at one end and a midi connection at the other. i think that all i should need is a diagram showing how to wire this connector, and a driver which allows the serial port to accept midi information from pd and send out a signal that a midi device would understand. so far though, i have been unable to find these things. if anyone is able to provide me with them (or whatever other things i would need if i am confused about this issue) or point me in the right direction towards finding them, it would help me out greatly. matt ____________________________________________________________ Get advanced SPAM filtering on Webmail or POP Mail ... Get Lycos Mail! http://login.mail.lycos.com/r/referral?aid=27005

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metasynth
by matthew jones 17 Jul '03

17 Jul '03

has anyone programmed a metasynth style synthesis patch? are the gui limitations of pd too severe to enable such a gui intensive application? I would love to write one but can't figure out how to do the the paintbrush interface, with different brush shapes and textures... matt -=-=-=-=-=-=-=-=-=-=-=-=- http://www.loopit.org/ -=-=-=-=-=-=-=-=-=-=-=-=-

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GridFlow more usable.
by Mathieu Bouchard 16 Jul '03

16 Jul '03

I found the bug that was causing random crashes especially through GridFlow's clock. The change has been applied to GridFlow cvs-current. I recall several folks here were waiting for this to happen. Well, it has happened now, so have fun. GridFlow's tech support hotline ;-) is still: IRC.FreeNode.Net #dataflow ________________________________________________________________ Mathieu Bouchard http://artengine.ca/matju

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alsa / oss layer / audiodev
by Tim Blechmann 15 Jul '03

15 Jul '03

Hi all, i tried some different audio settings for pd (pd 0.36-0) on my linux machine with my maudio quattro using alsa, i'm experiencing dio errors ever once in a while (about one or two times a minute). well, i can't hear them, but pd complains about it... using oss, i don't get any dio errors, but can only access the first two channels (/dev/dsp2), but not the second (/dev/adsp2). i tried to remap the second device with a symbolic link to /dev/dsp3, but when i try to open pd with -audiodev 2,3 i can only open one patch. when i open a second (sub-)patch i hear a nasty sound on the first device (/dev/dsp2), that keeps until i quit pd... is it possible to access the second device of a soundcard with pd? why do i get dio errors when i use the alsa interface instead of the oss-layer (it's the same driver, alsa 0.9.2)? i'd appreciate any hints... thanks... Tim mailto:TimBlechmann@gmx.net ICQ: 96771783 http://www.nyds-exp-discogs.tk -- The only people for me are the mad ones, the ones who are mad to live, mad to talk, mad to be saved, desirous of everything at the same time, the ones who never yawn or say a commonplace thing, but burn, burn, burn, like fabulous yellow roman candles exploding like spiders across the stars and in the middle you see the blue centerlight pop and everybody goes "Awww!" Jack Kerouac

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search options
by João Miguel Pais 15 Jul '03

15 Jul '03

Dear list, another suggestion for the pile, in case it is not already there: I am using v0.36 on windows. I noticed that when the find option is used, it looks for the text which corresponds exactly to the written field. Maybe to increase the use of this resource, would it be possible to have: - partial text search (part of word) - case doesn't have to coincide João Miguel Pais

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Pd-list July 2003