Pd-list March 2007

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139 participants
278 discussions

Sigmund and Sort (Was Real-time frequency filtering and analysis)
by Jared 30 Mar '07

30 Mar '07

Jaime Oliver wrote: > you could also check sigmund~ it will give you a list of frequencies > and amplitudes in order of amplitude. > > J > I think this is a result of my lack of experience with PD, but when I create an object and put sigmund~ in it the border stays dotted. The same thing was happening when I tried to use sort (which I thought was built-in, although I could be wrong). Am I doing something wrong, or do I need to install extra patches/libraries? I'm using 0.39-2, the default install on Ubuntu. Thanks again for everyone's help! -Jared

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abstraction: speedlim2
by marius schebella 30 Mar '07

30 Mar '07

hi, maybe this is a useful abstraction: speedlim2 outputs incoming values (symbols or floats) as a time sequenced series. I called it speedlim, but maybe someone finds a better word... marius.

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Re: [PD] .pdsettings and jack
by IOhannes m zmoelnig 30 Mar '07

30 Mar '07

victor wrote: > > > Imagine that I have configured my pd-extended in gnulinux. After I make > a little change in Startup windows and "save all settings". Well then it > too change .pdsettings, reducing considerably the number of lib loaded ah i see. > > I only want have a good .pdsettings for my use. That's all well, then you should add the "audioapi: 2" (for jack; as proposed in my last email) rather than some hackish stuff with the flags. and file a bug-report that the settings-saving mechanism breaks your .pdsettings (see http://sf.net/projects/pure-data) you could set everything (including 101 libraries to be loaded) via the flags-part of the pdsettings. however, i think this is dangerous. > > do you use often jack and gnulinux? > i never use jack and i always use gnu/linux. (btw, richard stallman insists on even pronouncing the slash, so you shouldn't omit it ;-)) m.adsr IOhannes

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Re: [PD] .pdsettings and jack
by IOhannes m zmoelnig 30 Mar '07

30 Mar '07

victor wrote: > I respond to myself > > The variable for activate flags in .pdsettings is just: > flags: > > example, for use -rt -jack -alsamidi, add to .pdsettings a line with > flags: -rt -jack -alsamidi > > :) well you can do this, but why? > > I think "save all settings" is not adapted for use pd-extended. Because > you need many path and lib lines. i don't know about pd-extended, but i doubt that it would not work there. audioapi: 2 mfg.asdr IOhannes

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Mplayer video into PDP/Gem
by Thomas Mayer 30 Mar '07

30 Mar '07

Hello, is there a way to route the video output of mplayer (or any other oss available for Linux) into Pd via PDP or Gem? AFAIK there are objects to use the input of webcams, can those be used to accomplish that? Thanks in advance, Thomas -- "Prisons are needed only to provide the illusion that courts and police are effective. They're a kind of job insurance." (Leto II. in: Frank Herbert, God Emperor of Dune) http://thomas.dergrossebruder.org/

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.pdsettings and jack
by victor 30 Mar '07

30 Mar '07

How can I activate jack from .pdsettings? Usually I load pd with command: pd -rt -jack -alsamidi Thanks

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Some Fuzzy Logic stuff you might be interested in...
by Mike McGonagle 30 Mar '07

30 Mar '07

Hi All, A couple of weeks ago I had asked about some Fuzzy Logic externals for PD, and last night I found an article that describes just that... You might want to check out his stuff, as it looks really good. I have not had a chance to test out the external, yet, but the article is a good read. http://www.rodrigocadiz.com/flctk http://www.rodrigocadiz.com/ Mike M

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messy graph on parent
by ruben patiño 30 Mar '07

30 Mar '07

hi iÅ½ve got a stupid problem with graph on parent. when i save a subpatch or i open someones else patch saved like graph on parent , i find a big mess were all the sliders and bangs are disorganized and all together so i canÅ½t control the patch properlly. i guess might be a easy way to solve it but i have no idea. thanks a lot best r. --------------------------------- LLama Gratis a cualquier PC del Mundo. Llamadas a fijos y mÃ³viles desde 1 cÃ©ntimo por minuto. http://es.voice.yahoo.com

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evolutive
by josue moreno 30 Mar '07

30 Mar '07

hi everyone, im making a research project about computer asisted composition, since that is so open i decided to focus my work on generative music and specially on cellular automata and evolutive techniques, the main trouble is that the works should have some instrumental writting participation (sheet music will be awsome) can anyone help me? thanks _________________________________________________________________ Dale rienda suelta a tu tiempo libre. Mil ideas para exprimir tu ocio con MSN Entretenimiento. http://entretenimiento.msn.es/

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Re: [PD] attack/release for spectral gate [was: is this a spectral gate?]
by Kevin McCoy 30 Mar '07

30 Mar '07

Got it - do be sure to check out I04.noisegate.pd, they may have beaten you to it. Even so we should add attack/release with vectral~ (which is maybe a standard object now?) and offer the patch as an improvement to the documentation. k On 3/29/07, Charles Henry <czhenry(a)gmail.com> wrote: > Cool! I will try this once I get done with work today. > > The difference between this spectral gate and a noise gate, as I tried > to describe it, is that it will separate the noise from narrow-band > signals. A noise gate just turns the audio on/off as a function of > amplitude. > > Later, > Chuck > > On 3/29/07, Kevin McCoy <km.takewithyou(a)gmail.com> wrote: > > GOT IT! > > > > It needs to use [vectral~] from cyclone (curiously included in pd > > 0.40-1 vanilla?!), which generates ramps across bins with the > > "rampsmooth" message. I found this out by poking around on some > > max/msp archives. Patch is attached, and sounds much much better now! > > > > There's no documentation but you can download the MSP documentation > > from cycling 74's website. It takes a sync signal for its leftmost > > two inlets (basically a phasor that ramps from 0 to n-1 (in this case > > 511) or whatever block/vector size you're using). I followed Miller's > > advice from a previous thread and just made a table like the hann > > window. > > > > Chuck I think this might help you with your idea too! > > > > Now to make a GOP abstraction... I might even make a tilt control so > > that the cutoff doesn't have to be the same for all freqs. BTW, the > > [expr~] object in the fft-analysis subpatch should be replaced with > > [q8_sqrt~] - sqrt~ objs just happen to be broken in 39-2 extended > > test7 right now so I had to use expr~. > > > > Kevin > > > > On 3/29/07, Kevin McCoy <km.takewithyou(a)gmail.com> wrote: > > > Hi Chuck! > > > > > > Actually I was working on it tonight. The problem with it is that it > > > is too harsh and leaves too many artifacts on the signal right now > > > because the binary [>~] from zexy needs to be smoothed out with > > > attack/release that persists across different blocks in time. What I > > > tried tonight was successive delay lines where the block starts out at > > > 0.25 of its original amplitude, then passes to another delay and is > > > amplified to 0.5, then to 1, held at 1, down to 0.5, and then to 0.25 > > > and back off. Successive delay lines that increase and then decrease > > > were the only way I could think to do this job of smoothing it out > > > over time and preserve information from past blocks of audio. I've > > > attached the patch as I was working on it tonight. > > > > > > However, this has some problems of its own and I was getting a lot of > > > high frequencies that I didn't want there, so I think this approach > > > will need to be windowed as well - the delay lines may need to be > > > smoothed too, something along the lines of the pitch shifting example > > > in the documentation, except in the frequency domain?? I dunno and > > > I'm in a little bit over my head at this point. It's hard to measure > > > and assess what you do right and wrong in the frequency domain! > > > Sometimes a brother just needs a scope. I am also open to fact that I > > > am completely wrong about this :) > > > > > > What you're describing, if I read you correctly, is I think > > > implemented in the noisegate example in Pd's doc... if they are > > > different, could you clarify? but all of these just sound bad to me > > > and of poor quality, they really need attack and release to sound > > > convincing/interesting and less "artifact-y" when you really push > > > them. I'm all for destruction/mangling of audio, and FFT seems truly > > > powerful in that regard, but I just don't like these results yet. Of > > > course, Tom Erbe's soundhack filters already do this, but he hasn't > > > responded to this on how he got attack/release to work for him - it > > > may need to be handled differently in Pd as opposed to whatever he > > > used to code those VSTs. > > > > > > That said, I would *love* to hear/try what you come up with. Let's be > > > in touch about this! > > > > > > Kevin > > > > > > > > > On 3/28/07, Charles Henry <czhenry(a)gmail.com> wrote: > > > > Hi, Kevin, > > > > I liked your idea for a spectral gate. I can see two possible > > > > applications for it: > > > > 1. removing broadband noise from signals > > > > 2. masking out one sound from a collection of sounds > > > > > > > > And the first option is especially cool. It would be like a noise > > > > gate on steroids, because it would remove the noise, even when there's > > > > a signal present. If it's alright... I'd like to give it a try, and > > > > send it to you. > > > > I'll re-format it so that one signal (noise or whatever) can be > > > > recorded and then used to mask the same signals out of a continuous > > > > signal input. In fact this can be reformatted as a kind of weiner > > > > filter, which will optimally reconstruct signals in the presence of > > > > noise. > > > > Have you gotten this working the way you want yet? > > > > > > > > Chuck > > > > > > > > On 3/23/07, Kevin McCoy <km.takewithyou(a)gmail.com> wrote: > > > > > Hello all, > > > > > > > > > > A while ago I was working on a spectral gate patch and now I've come > > > > > back to it. Here's a quote from Tom Erbe's earlier email: > > > > > > > > > > "For a spectral gate, just calculate the amplitude from real and imag, > > > > > make your gate decision based on the amplitude and threshold, and > > > > > then apply the same gain reduction to both real and imag. Add attack > > > > > and release to the gate-gain for smoother results." > > > > > > > > > > I want to add the attack and release so it sounds smoother and less > > > > > bubbly/harsh (know what I mean?) I am racking my brain trying to > > > > > figure out how to do this to each of the frequencies. The soundhack > > > > > vst does this really nicely and even has a visual representation of > > > > > the gate where you can see it rise and fall with attack/release for > > > > > the whole spectrum. > > > > > > > > > > The problem for me is persistence across different blocks. I suspect > > > > > [line~] doesn't work for this as it does for amplitude attack/release > > > > > implementations. For example, if there is a spike around 3000 Hz, how > > > > > can I carry that attack and release across several blocks of audio? I > > > > > used delay objects with what I thought was some success, but I don't > > > > > think I had it right. I have attached the patch which is basically > > > > > what Frank posted earlier - it does not have any of this yet and is > > > > > just a hard on/off. > > > > > > > > > > Much confusion, I would be grateful for any help! > > > > > Kevin > > > > > -- > > > > > > > > > > > > > > > ++++ > > > > > http://pocketkm.blogspot.com > > > > > > > > > > _______________________________________________ > > > > > PD-list(a)iem.at mailing list > > > > > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > ++++ > > > http://pocketkm.blogspot.com > > > > > > > > > > > > -- > > > > > > ++++ > > http://pocketkm.blogspot.com > > > > > -- ++++ http://pocketkm.blogspot.com

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Pd-list March 2007