Re: [PD] msd change mass of mass
one more. not at all cpu-friendly but a real msd. m. Andy Farnell wrote: You're a hero Chuck. This tallys well with the equations in Perrys book. What I was missing is the step where you get the transfer function. I made (attached) a little test rig. What isn't looking right is the underdamped behaviour. I was expecting to see a decaying oscillation around the top point. Maybe my test has errors. a. On Sat, 15 Mar 2008 19:16:29 -0500 "Charles Henry" <[EMAIL PROTECTED]> wrote: Note, when c goes to 0, we get a harmonic oscillator at angular frequency w=k/m rad/sec, which is correct. When we increase the damping, we get terms of e^(-0.5*c/m*t) which damps the solution. made a typo here: angular frequency w=sqrt(k/m) rad/sec and f=sqrt(k/m)/2pi Hz ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list #N canvas 114 22 1068 663 10; #X obj 209 212 cnv 15 100 40 empty empty empty 20 12 0 14 -96960 -66577 0; #X obj 334 211 cnv 15 100 40 empty empty empty 20 12 0 14 -96960 -66577 0; #X obj 458 212 cnv 15 100 40 empty empty empty 20 12 0 14 -96960 -66577 0; #N canvas 335 49 771 605 subb 0; #X obj 86 308 msd; #X obj 156 558 outlet~; #X obj 86 351 unpack; #X obj 401 48 inlet; #X msg 59 283 bang \, get massesPos 1; #X obj 86 329 route massesPosNo; #X msg 370 213 forceX 1 \$1; #X obj 370 142 moses 20; #X obj 370 164 * 0.05; #X floatatom 478 65 5 0 0 0 - - -; #X obj 478 118 /; #X msg 478 96 1; #X obj 478 44 inlet; #X obj 571 44 inlet; #X obj 86 258 spigot; #X obj 370 272 spigot; #X floatatom 133 256 5 0 0 0 - - -; #X obj 119 234 r \$0-frommet; #X floatatom 423 265 5 0 0 0 - - -; #X obj 403 239 r \$0-fromnoi; #X obj 232 350 0; #X msg 247 327 0; #X obj 178 415 tabwrite \$0-bu; #X obj 232 372 t f f; #X obj 232 392 + 1; #X obj 179 436 table \$0-bu 64; #X obj 676 36 block~ 1; #X text 309 386 hack hack hack...; #X obj 370 122 random 1; #N canvas 166 43 493 434 bang-64-sub 0; #X obj 94 77 bang~; #X obj 94 229 delay 0.0226757; #X obj 56 278 outlet; #X obj 272 274 outlet; #X obj 94 149 t b b b; #X obj 196 229 bang; #X msg 113 172 stop; #X connect 0 0 4 0; #X connect 1 0 5 0; #X connect 1 0 2 0; #X connect 4 0 2 0; #X connect 4 0 1 0; #X connect 4 1 6 0; #X connect 4 2 3 0; #X connect 5 0 1 0; #X connect 6 0 1 0; #X restore 59 26 pd bang-64-sub; #X obj 156 536 tabread~ \$0-bu; #X obj 156 494 phasor~ 689.062; #X msg 243 472 0; #X obj 156 514 *~ 64; #X obj 86 211 inlet; #X floatatom 570 71 5 0 0 0 - - -; #X obj 370 187 * 0.01; #X connect 0 0 5 0; #X connect 2 1 22 0; #X connect 3 0 0 0; #X connect 4 0 0 0; #X connect 5 0 2 0; #X connect 6 0 15 0; #X connect 7 0 8 0; #X connect 8 0 36 0; #X connect 9 0 7 1; #X connect 9 0 10 1; #X connect 9 0 11 0; #X connect 10 0 8 1; #X connect 11 0 10 0; #X connect 12 0 9 0; #X connect 13 0 35 0; #X connect 13 0 36 1; #X connect 14 0 0 0; #X connect 15 0 0 0; #X connect 17 0 14 1; #X connect 17 0 16 0; #X connect 19 0 15 1; #X connect 19 0 18 0; #X connect 20 0 23 0; #X connect 21 0 20 1; #X connect 23 0 24 0; #X connect 23 1 22 1; #X connect 24 0 20 1; #X connect 28 0 7 0; #X connect 29 0 4 0; #X connect 29 0 20 0; #X connect 29 0 28 0; #X connect 29 1 21 0; #X connect 29 1 32 0; #X connect 30 0 1 0; #X connect 31 0 33 0; #X connect 32 0 31 1; #X connect 33 0 30 0; #X connect 34 0 14 0; #X connect 36 0 6 0; #X restore 101 461 pd subb; #X obj 102 559 dac~; #X obj 101 110 metro 400; #X obj 101 88 tgl 15 0 \$0-frommet \$0-tomet empty 17 7 0 10 -262144 -1 -1 0 1; #X msg 101 408 forceX 1 \$1; #X floatatom 136 384 5 0 0 0 - - -; #X floatatom 153 87 5 0 0 0 - - -; #X msg 221 394 setK l \$1; #X text 463 209 change damping; #X msg 244 420 setD l \$1; #X obj 204 338 pack 1 1 0; #X text 336 209 change rigidity; #X text 228 184 ~ 1; #X text 605 217 (rigidity + damping together should not exceed double of mass...); #X text 180 531 can get very loud otherwise..; #X text 360 185 keep low \, maybe 0.2; #X obj 614 335 hsl 151 15 0 1000 0 0 empty \$0-noise empty -2 -8 0 10 -262144 -1 -1 4300 1; #X obj 614 358 hsl 151 15 0 1 0 0 empty \$0-amount empty -2 -8 0 10 -262144 -1 -1 250 1; #X text 775 333 noise; #X text 775 353 amount of force; #N canvas 125 455 583 331 presets 0; #X obj 70 197 s \$0-rigidity; #X obj 80 217 s \$0-damping; #X obj 100 237 s \$0-noise; #X obj 110 257 s \$0-amount; #X obj 60 177 s \$0-mass; #X obj 332 94 r \$0-frommet; #X obj 422 95 r \$0-fromnoi; #X obj 332 114 sel 1; #X obj 422 114 sel 1; #X msg 332 135 0; #X obj 332 160 s \$0-tonoi; #X msg 422 135 0; #X obj 422 160 s \$0-tomet; #X obj 60 147 unpack 0 0 0 0 0 0; #X obj 187 177 sel 1; #X msg 187 198 1; #X obj 251 232 s \$0-tonoi; #X obj 185 232 s \$0-tomet; #X msg 218 198 1; #X
Re: [PD] Compiling netsend~/netreceive~ on intel mac
Actually, I mean the two signal rate versions that were written by Olaf Mathews. They let you stream signal rate data over the network in a similar fashion. I have no problem compiling them under my ubuntu machine, but they wont compile correctly on mac intel. I think they might need some makefile tweekage? heres a link to the source and some ppc versions. http://www.nullmedium.de/dev/netsend~/ Roman Haefeli wrote: On Sat, 2008-03-15 at 18:38 -0500, Philip Rivera wrote: Hello, This is my first post to this list, yo, hi and welcome to this list. so I'm not quite sure how it works yet. I've been trying to compile Olaf Matthews netsend~ and netreceive~ i assume you mean [netsend] and [netreceive]. afaik, there are no signal versions of them. objects for pd for an intel mac. Has anyone had any success with this, or has binaries already compiled. Haven't been able to find anything on the web about it. the simplest way of getting the externals is to install pd-extended, which is pd with almost all available externals pre-compiled for many platforms. check: http://puredata.info/downloads roman ___ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] bang~ <=64 samples
using tables now, coming closer! m. marius schebella wrote: > ...uhmm, negative. > I created now a subpatch with the 64 delays, and get good timer > measurements of 0.0226757 ms. but when I hook it up to sig~ the signal > is still only updated every 64 samples. same btw with vline~. I was > trying [$1 1.45( into line~, but that only a bad fake, and the ring > modulator effect is still there... > am I missing something? > marius. > > Miller Puckette wrote: >> Bang~ goes off at 64-sample intervals (1.45 msec) - but for instance >> a 0.725 msec delay would sync a message to 32 sample into a 64 sample >> buffer. Of course you might need objects that can deal with messages on >> such a fine time grain. Tne only one I know of is vline~ (which is the >> one I use for this kind of thing.) >> >> cheers >> M >> >> On Sat, Mar 15, 2008 at 10:45:05PM -0400, marius schebella wrote: >>> hi miller, >>> not exaclty sure what sub-64-sample message delays means? >>> block~ 64 64? or 64 delays each 0.0226757369615 ms. >>> will test this. >>> marius. >>> >>> Miller Puckette wrote: You can do it combining bang~ with sub-64-sample message delays. cheers M On Sat, Mar 15, 2008 at 10:05:46PM -0400, marius schebella wrote: > hi, > is there an alternative for bang~ that will work with blocksizes > smaller than 64 samples? > or is there a chance to fix bang~? > marius. > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list >>> >>> ___ >>> PD-list@iem.at mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >> > > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] bang~ <=64 samples
...uhmm, negative. I created now a subpatch with the 64 delays, and get good timer measurements of 0.0226757 ms. but when I hook it up to sig~ the signal is still only updated every 64 samples. same btw with vline~. I was trying [$1 1.45( into line~, but that only a bad fake, and the ring modulator effect is still there... am I missing something? marius. Miller Puckette wrote: > Bang~ goes off at 64-sample intervals (1.45 msec) - but for instance > a 0.725 msec delay would sync a message to 32 sample into a 64 sample > buffer. Of course you might need objects that can deal with messages on > such a fine time grain. Tne only one I know of is vline~ (which is the > one I use for this kind of thing.) > > cheers > M > > On Sat, Mar 15, 2008 at 10:45:05PM -0400, marius schebella wrote: >> hi miller, >> not exaclty sure what sub-64-sample message delays means? >> block~ 64 64? or 64 delays each 0.0226757369615 ms. >> will test this. >> marius. >> >> Miller Puckette wrote: >>> You can do it combining bang~ with sub-64-sample message delays. >>> >>> cheers >>> M >>> >>> On Sat, Mar 15, 2008 at 10:05:46PM -0400, marius schebella wrote: hi, is there an alternative for bang~ that will work with blocksizes smaller than 64 samples? or is there a chance to fix bang~? marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] phasor~ usage question
Hi, Can someone please give me a bit of info regarding the example illustrated in the page, http://crca.ucsd.edu/~msp/techniques/latest/book-html/node198.html > Each parabolic wave is computed from a sawtooth wave (ranging from > -0.5 to 0.5) by squaring it, multiplying by 0.5, and subtracting > the DC component of -1/12, or -0.08333. I could not quite understand where this offset of 0.08333 comes from. Are there any descriptions of the theory behind this? Also, this example has a message connected directly to [phasor~] while a good number of other samples (including the [phasor~] help file) has a [sig~] in between. Is there any difference in the behavior? Thanks. -- David Shimamoto ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] bang~ <=64 samples
Bang~ goes off at 64-sample intervals (1.45 msec) - but for instance a 0.725 msec delay would sync a message to 32 sample into a 64 sample buffer. Of course you might need objects that can deal with messages on such a fine time grain. Tne only one I know of is vline~ (which is the one I use for this kind of thing.) cheers M On Sat, Mar 15, 2008 at 10:45:05PM -0400, marius schebella wrote: > hi miller, > not exaclty sure what sub-64-sample message delays means? > block~ 64 64? or 64 delays each 0.0226757369615 ms. > will test this. > marius. > > Miller Puckette wrote: > > You can do it combining bang~ with sub-64-sample message delays. > > > > cheers > > M > > > > On Sat, Mar 15, 2008 at 10:05:46PM -0400, marius schebella wrote: > >> hi, > >> is there an alternative for bang~ that will work with blocksizes smaller > >> than 64 samples? > >> or is there a chance to fix bang~? > >> marius. > >> > >> ___ > >> PD-list@iem.at mailing list > >> UNSUBSCRIBE and account-management -> > >> http://lists.puredata.info/listinfo/pd-list > > > > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] bang~ <=64 samples
hi miller, not exaclty sure what sub-64-sample message delays means? block~ 64 64? or 64 delays each 0.0226757369615 ms. will test this. marius. Miller Puckette wrote: > You can do it combining bang~ with sub-64-sample message delays. > > cheers > M > > On Sat, Mar 15, 2008 at 10:05:46PM -0400, marius schebella wrote: >> hi, >> is there an alternative for bang~ that will work with blocksizes smaller >> than 64 samples? >> or is there a chance to fix bang~? >> marius. >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] bang~ <=64 samples
You can do it combining bang~ with sub-64-sample message delays. cheers M On Sat, Mar 15, 2008 at 10:05:46PM -0400, marius schebella wrote: > hi, > is there an alternative for bang~ that will work with blocksizes smaller > than 64 samples? > or is there a chance to fix bang~? > marius. > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] bang~ <=64 samples
hi, is there an alternative for bang~ that will work with blocksizes smaller than 64 samples? or is there a chance to fix bang~? marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] Compiling netsend~/netreceive~ on intel mac
On Sat, 2008-03-15 at 18:38 -0500, Philip Rivera wrote: > Hello, > > This is my first post to this list, yo, hi and welcome to this list. > so I'm not quite sure how it works yet. I've been trying to compile > Olaf Matthews netsend~ and netreceive~ i assume you mean [netsend] and [netreceive]. afaik, there are no signal versions of them. > objects for pd for an intel mac. Has anyone had any success with > this, or has binaries already compiled. Haven't been able to find > anything on the web about it. the simplest way of getting the externals is to install pd-extended, which is pd with almost all available externals pre-compiled for many platforms. check: http://puredata.info/downloads roman ___ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
You're a hero Chuck. This tallys well with the equations in Perrys book. What I was missing is the step where you get the transfer function. I made (attached) a little test rig. What isn't looking right is the underdamped behaviour. I was expecting to see a decaying oscillation around the top point. Maybe my test has errors. a. On Sat, 15 Mar 2008 19:16:29 -0500 "Charles Henry" <[EMAIL PROTECTED]> wrote: > > Note, when c goes to 0, we get a harmonic oscillator at angular > > frequency w=k/m rad/sec, which is correct. When we increase the > > damping, we get terms of e^(-0.5*c/m*t) which damps the solution. > > made a typo here: > > angular frequency w=sqrt(k/m) rad/sec > and f=sqrt(k/m)/2pi Hz > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list -- Use the source msd-chuck.tar.gz Description: Binary data ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] Miller's PD-Guitar Workshop LAC 2008
If you don't want to build your own, RMC has a preamp/breakout box http://www.rmcpickup.com/fanoutbox.html Slightly expensive though... On Mar 14, 2008, at 10:02 AM, Miller Puckette wrote: > Hi all, > > I believe mine is a GK-2A as well. I built an unbalanced preamp and > power supply, and didn't get any appreciable hum. (However, I do > sometimes get ground loop trouble batween computers and audio systems > and sometimes have to ground lift my computer and monitor, which is a > bit dangerous.) > > I've put the files up on http://crca.ucsd.edu/~msp/lac/ but I don't > know if they'll be too useful for folks who weren't there to see what > the patches did. Roughly speaking, the patch works out the techniques > described in the "patch for guitar" paper. > > cheers > Miller > > On Fri, Mar 14, 2008 at 09:18:46AM -0700, [EMAIL PROTECTED] wrote: >> >>> I am trying to get some more information about which Pickup was >>> used by >> Miller (was it the GK-3 ??) >> >> Hi Luigi and list, >> >> here's what I use: >> >> -Roland GK-2A pickup ( http://www.roland.com/products/en/GK-2A/specs.html >> ) >> -a homebrew 6-channel preamp which gives 6 balanced line signals >> that go >> straight into my soundcard. >> First the preamp's signal was not balanced but I got ground loop >> noise at >> some venues. >> Even before that, I had a preamp built into my roland GR-50, but >> then I >> figured I wasn't going to use that anyway, so I got rid of it >> completely. >> The preamp also provides power for the GK-2A. >> Although the pickup is right next to the bridge, after eq-ing out >> some >> highs I can get pretty decent results. >> I have some recordings online if you want. >> >> gr, >> Tim >> >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list - - - - - tom erbe ~ [EMAIL PROTECTED] ~ studio director - computer music ~ ucsd department of music ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] Guitar Heroes controller
Just an update. Bought PC/Mac version of Guitar Heroes III today. Looks like the controller is an Xbox 360 version since the logo is smack on there. Can't seem to get it recognized with [hid] on OS X, but was able to get hidin help patch to recognize it. a bit of garbage in the information it was spitting out, but the main buttons work nicely. Any idea why OS X pd extended is not recognizing the device? Maybe I'm not setting it up correctly. James *** astroboy2520 Visit my blogs: http://triphop-universe.blogspot.com http://videokilledtheradiostar.vox.com Myspace: http://www.myspace.com/astroboy2520 Skype: astroboy2520 MSN: astroboy2520[at]sbcglobal.net - Original Message From: Hans-Christoph Steiner <[EMAIL PROTECTED]> To: Hans-Christoph Steiner <[EMAIL PROTECTED]> Cc: Derek Holzer <[EMAIL PROTECTED]>; James Rojsirivat <[EMAIL PROTECTED]>; pd-list@iem.at Sent: Wednesday, March 12, 2008 7:54:49 PM Subject: Re: [PD] Guitar Heroes controller I found something on this page about Guitar Hero + Max/MSP. He says the Xbox version works fine with a computer while the PS2 version needs an adapter. The adapter looks like it is for adapting a different plug type, though, not for plugging in a USB PS2 controller. http://theguitarzeros.com/download_fretbuzz.php .hc On Mar 12, 2008, at 10:53 PM, Hans-Christoph Steiner wrote: > > On a related note, I just bought one of these very nice controllers > called a gametrak. It is basically like two 3D joysticks but > instead of sticks, it has strings which you can clip on to things > to track them in 3D. The cheesy promo video gives you a good idea > of what you can do with it: > > http://www.in2games.uk.com/corporate/press-item.php?pressid=5 > > I used one that Jonas Hielscher let me borrow and I plugged it in > and it just worked with [hid]. I just got the one I ordered, it is > a "PlayStation 2" controller, I am not sure which Jonas' is. But > with mine, it shows up in [hid] fine, but I don't get any data from > it. > > Anyone know, is there something special about PS2 USB controllers? > > .hc > > > On Mar 12, 2008, at 8:12 PM, Derek Holzer wrote: > >> Should just be HID protocol. Check the help patch for the [hid] >> object >> (in Extended or self-compiled) and see what parameters come in. After >> that, enjoy mapping them to something and rock out! >> >> d. >> >> James Rojsirivat wrote: >>> I've seen some developments with the Guitar Heroes controller on >>> Max/MSP. I've been unable to get the one patch I found to really >>> open in >>> PD. I'd love to try to do something with it. Anyone has any >>> experience >>> developing and working with the Mac/PC version of the controller >>> in PD? >>> Any tips would greatly be appreciated. >> >> -- >> derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/ >> macumbista >> ---Oblique Strategy # 71: >> "Fill every beat with something" >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> http://lists.puredata.info/ >> listinfo/pd-list > > > > -- > -- > > There is no way to peace, peace is the way. -A.J. Muste > > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
> Note, when c goes to 0, we get a harmonic oscillator at angular > frequency w=k/m rad/sec, which is correct. When we increase the > damping, we get terms of e^(-0.5*c/m*t) which damps the solution. made a typo here: angular frequency w=sqrt(k/m) rad/sec and f=sqrt(k/m)/2pi Hz ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
I have forgotten some things here. That's why it took so long, but I think I've got it mostly right. There are two type of mass spring systems, depending on what kind of input you have. force-driven: such as a loudspeaker--the coil induces a force on a permanent magent. velocity driven: a crankshat-piston assembly--rotates with a fixed speed;classic problems for vibration isolation. but I'm only going to cover the first one here. these two type of inputs are similar to electronic circuits: a voltage source (force) and a current source (velocity) so, a mechanical circuit would look like: |-(M)---(S)(D)---| (F) | || all in series Suppose our output is the velocity. F=m*a (the force on a mass is in the same direction as its acceleration) F=c*v (the damping force is in the opposite direction of velocity) F=k*d (the spring force is in opposite direction of displacement) F(t)=m*dv/dt + c*v + k*integral(t0 to t, v*dt) Laplace transform: F(s)=(m*s+c+k/s)*V(s) And the transfer function: F(s) 1/k*s -- = -- V(s) (m/k)*s^2 + (c/k)*s + 1 And there are three cases: underdamped, critically damped, and over damped (I'm not sure how to do the z-transform for a critically damped system, but I think we can figure it out). poles: -0.5*c/m +/- 0.5*sqrt( (c/m)^2 - 4k/m ) zero: 0 Note, when c goes to 0, we get a harmonic oscillator at angular frequency w=k/m rad/sec, which is correct. When we increase the damping, we get terms of e^(-0.5*c/m*t) which damps the solution. Under-damped case (the resonant system): (c/m)^2 - 4k/m < 0 I'm reluctant to try to use a bi-linear tranform, here. I'd like to look it up in a table! I've worked through these problems before, but I can't remember what you do differently with the numerator... I think it indicates a mixture of sines/cosines. z-transform of (s+a)/ ((s+a)^2 + b^2) is (1 - z^(- 2)*e^(-aT)*cos(b*T) ) / (1 - z^(-1)*e^(-aT)*cos(b*T) + z^(-2)*e^(-2*a*T) ) T is 1/fs, our sample rate z-transform of 1/((s+a)^2 + b^2) is 1/b * z^(-1) * e^(-aT)*sin(b*T) / (1 - z^(-1)*e^(-aT)*cos(b*T) + z^(-2)*e^(-2*a*T) ) so, s/ ((s+a)^2 + b^2) is (1 - a/b * z^(-1) * e^(-aT)*sin(b*T) - z^(- 2)*e^(-aT)*cos(b*T) ) / (1 - z^(-1)*e^(-aT)*cos(b*T) + z^(-2)*e^(-2*a*T) ) In our case, a=0.5*c/m and b=0.5*sqrt( abs((c/m)^2 - 4k/m )) and our biquad coefficients are: ff1=1 ff2= -a/b*e^(-aT)*sin(b*T) ff3= -e^(-aT)*cos(b*T) fb1=e^(-aT)*cos(b*T) fb2=-e^(-2*a*T) I've put together a little patch, calculator and example biquad. This took a little more time than I expected, and I'm running out of steam here. Try it out, and see if it's what you had in mind. There are two more cases to cover, but this is probably the one you want. I may come back to this later Chuck On Sat, Mar 15, 2008 at 3:09 PM, marius schebella <[EMAIL PROTECTED]> wrote: > yes, I was talking about an external called msd. > I am not sure if biquad~ or fexpr~ can help. Is it possible to create > harmonic sounds by sending impulses into a biquad~? that would really > help. right now I am playing with msd in a block~ 1 subpatch, which is > not very efficient. > marius. > > > > Charles Henry wrote: > > Are you talking about some kind of mass, spring, damper equation? > > > > We could write such a thing with just a biquad~ or fexpr~, if that > > makes life easier. It's just a little bit of math. > > > > Chuck > > > > On Sat, Mar 15, 2008 at 1:32 PM, marius schebella > > <[EMAIL PROTECTED]> wrote: > >> hi, > >> is someone working on msd? I wonder why it is not possible to change the > >> mass of a mass dynamically with something like [setMass m1 1.5( > >> is this function not supported because it is not possible, or just > >> because it was not implemented yet. > >> marius. > >> > >> ___ > >> PD-list@iem.at mailing list > >> UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >> > > > > mass_spring_damper.pd Description: Binary data ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] Compiling netsend~/netreceive~ on intel mac
Hello, This is my first post to this list, so I'm not quite sure how it works yet. I've been trying to compile Olaf Matthews netsend~ and netreceive~ objects for pd for an intel mac. Has anyone had any success with this, or has binaries already compiled. Haven't been able to find anything on the web about it. thx ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
marius schebella a écrit : > yes, I was talking about an external called msd. > I am not sure if biquad~ or fexpr~ can help. Is it possible to create > harmonic sounds by sending impulses into a biquad~? yes, serch for resonator on this list. there was an exemple using fexpr~ (i think) > that would really > help. right now I am playing with msd in a block~ 1 subpatch, which is > not very efficient. use pmpd~ cyrille > marius. > > Charles Henry wrote: >> Are you talking about some kind of mass, spring, damper equation? >> >> We could write such a thing with just a biquad~ or fexpr~, if that >> makes life easier. It's just a little bit of math. >> >> Chuck >> >> On Sat, Mar 15, 2008 at 1:32 PM, marius schebella >> <[EMAIL PROTECTED]> wrote: >>> hi, >>> is someone working on msd? I wonder why it is not possible to change the >>> mass of a mass dynamically with something like [setMass m1 1.5( >>> is this function not supported because it is not possible, or just >>> because it was not implemented yet. >>> marius. >>> >>> ___ >>> PD-list@iem.at mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >>> > > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
ok, I can create some nice sounds with biquad~ and fexpr~, but with biquad~ I still have the problem, that I cannot change the settings dynamically. otoh fexpr~ might be a solution. uhmm, andy, I do *not* (yet?) fairly understand the maths behind that. I kind of avoided biquad~ and filters, I guess it's now or never. marius. Charles Henry wrote: > Are you talking about some kind of mass, spring, damper equation? > > We could write such a thing with just a biquad~ or fexpr~, if that > makes life easier. It's just a little bit of math. > > Chuck > > On Sat, Mar 15, 2008 at 1:32 PM, marius schebella > <[EMAIL PROTECTED]> wrote: >> hi, >> is someone working on msd? I wonder why it is not possible to change the >> mass of a mass dynamically with something like [setMass m1 1.5( >> is this function not supported because it is not possible, or just >> because it was not implemented yet. >> marius. >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
I would be interested to see an example of that Chuck Assuming Marius and I fairly understand LTIs, how would we end up with coefficients for Biquad starting with units like mass, Youngs modulus etc? And biquads are quite efficient, so if we had a little helper abstraction that calculated an MSD type behaviour that would be very nice. If I remember the msd externals are bit hungry. On Sat, 15 Mar 2008 14:20:56 -0500 "Charles Henry" <[EMAIL PROTECTED]> wrote: > Are you talking about some kind of mass, spring, damper equation? > > We could write such a thing with just a biquad~ or fexpr~, if that > makes life easier. It's just a little bit of math. > > Chuck > > On Sat, Mar 15, 2008 at 1:32 PM, marius schebella > <[EMAIL PROTECTED]> wrote: > > hi, > > is someone working on msd? I wonder why it is not possible to change the > > mass of a mass dynamically with something like [setMass m1 1.5( > > is this function not supported because it is not possible, or just > > because it was not implemented yet. > > marius. > > > > ___ > > PD-list@iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list -- Use the source ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
yes, I was talking about an external called msd. I am not sure if biquad~ or fexpr~ can help. Is it possible to create harmonic sounds by sending impulses into a biquad~? that would really help. right now I am playing with msd in a block~ 1 subpatch, which is not very efficient. marius. Charles Henry wrote: > Are you talking about some kind of mass, spring, damper equation? > > We could write such a thing with just a biquad~ or fexpr~, if that > makes life easier. It's just a little bit of math. > > Chuck > > On Sat, Mar 15, 2008 at 1:32 PM, marius schebella > <[EMAIL PROTECTED]> wrote: >> hi, >> is someone working on msd? I wonder why it is not possible to change the >> mass of a mass dynamically with something like [setMass m1 1.5( >> is this function not supported because it is not possible, or just >> because it was not implemented yet. >> marius. >> >> ___ >> PD-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] [folder_list] problems
Hello all, I am having trouble running hardoff's brilliant patch on my mac pro. one of the abstractions it requires is [folder_list]. i just get the old could create message. I have just installed the latest version os pd extended. could this be an intel chip issue? -- Thanks, Ben C. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] msd change mass of mass
Are you talking about some kind of mass, spring, damper equation? We could write such a thing with just a biquad~ or fexpr~, if that makes life easier. It's just a little bit of math. Chuck On Sat, Mar 15, 2008 at 1:32 PM, marius schebella <[EMAIL PROTECTED]> wrote: > hi, > is someone working on msd? I wonder why it is not possible to change the > mass of a mass dynamically with something like [setMass m1 1.5( > is this function not supported because it is not possible, or just > because it was not implemented yet. > marius. > > ___ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] msd change mass of mass
hi, is someone working on msd? I wonder why it is not possible to change the mass of a mass dynamically with something like [setMass m1 1.5( is this function not supported because it is not possible, or just because it was not implemented yet. marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] Photo and wifi
Hello tout le monde, i try to make a connection between 2 numeric cameras and pd by wifi. My idea is to get the picture from the camera in jpeg format into pd "live and direct". After i'll want to put some effect and then screen a picture made from 2 different sources. Is there a lib that give that kind of work i'm on OSx 10.3 and 10.4 and ubuntu thanks -- TNTB t'es in t'es bat 1 Rue Camille Pelletant 13210 St Remy de Provence T/: 04 90 26 95 09 P/: 06 86 86 12 19 + http://www.tntb.net === ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
