Re: [PD] audio signal distinguishing

[Seb Shader via Pd-list]

By having them appropriately low-passed and sampled. Digital audio is sampled. 
If you sample a real-world signal without putting a lowpass filter on it first, 
you will getthese frequencies of over pi radians. Notice how the higher 
frequency (3pi/2) gets sampled less than twice in one period, and the highest 
frequency thatcould be sampled twice a period is pi radians/sample. So, before 
sampling we need to put a lowpass filter on the signal in order to filter out 
everythinghigher in frequency than pi radians/sample. Otherwise, the 
higher-frequency real signals will "go past" the 2 sampling points and you will 
get 2 different sine waves that could be represented by the same samples. 
Therefore in practice, digital audio assumes that the samples represent sine 
waves lower than pi radiansin frequency. so if you did sample without low 
passing first, you would get these weird lower-frequency sine waves in your 
digital signal that correspond to air pressure waves (sounds) higher than the 
range of human hearing, assuming a normal sample-rate
Also notice that if you have a real sampled cosine wave w/ higher frequency 
than pi radians/sample it can be represented as the frequency (frequency in 
radians - 2pi) which will be negative. This negative frequency will be the same 
as the positive frequency it will be confused for when sampled.If you have a 
sine wave that's higher than pi radians/sample, it will also be confused for 
the same corresponding negative frequency, but negative (shifted by 1/2 
aperiod).
Since all sinusoids are linear combinations of sine and cosine, this means that 
any sampled sinusoid of frequency higher than pi radians will be confused for 
thecorresponding frequency of radians if the higher frequency on the unit 
circle were flipped over the x axis from the negative to the positive-y part. 
(with thelower-frequency sine portion being multiplied by -1)
and obviously if the signal to be sampled is higher than 2pi radians/sample in 
frequency it will be confused for the corresponding lower frequency on the unit 
circle,in radians/sample
Hope this helps,    -Seb

-Original Message-
From: Billy Stiltner 
To: pd-list@lists.iem.at 
Sent: Thu, May 23, 2019 10:14 am
Subject: [PD] audio signal distinguishing

from chapter 3 of theory and techniques of electronic music"Figure 3.1: Two 
real sinusoids, with angular frequencies π/2 and 3π/2, showingthat they 
coincide at integers. A digital audio signal can’t distinguish betweenthe two."
How does an audio signal distinguish 2 
waveforms?___
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[PD] Fwd: Directory of opened patch

[Seb Shader via Pd-list]

Hi,
    There's an object [rootinfo] in my library that gives the path, name and 
"parent level" of the root canvas https://github.com/sebshader/shadylib; 
there's also [ggee/getdir] which gives the path of the "parent level" provided 
in the argument
-Seb

-Original Message-
From: Philip Stone 
To: pd-list@lists.iem.at 
Sent: Thu, Apr 18, 2019 1:12 pm
Subject: [PD] Directory of opened patch

 #yiv5827315665 #yiv5827315665 #yiv5827315665 -- filtered {panose-1:2 4 5 3 5 4 
6 3 2 4;}#yiv5827315665 filtered {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 
2 4;}#yiv5827315665 p.yiv5827315665MsoNormal, #yiv5827315665 
li.yiv5827315665MsoNormal, #yiv5827315665 div.yiv5827315665MsoNormal 
{margin:0in;margin-bottom:.0001pt;font-size:12.0pt;font-family:sans-serif;}#yiv5827315665
 a:link, #yiv5827315665 span.yiv5827315665MsoHyperlink 
{color:#0563C1;text-decoration:underline;}#yiv5827315665 a:visited, 
#yiv5827315665 span.yiv5827315665MsoHyperlinkFollowed 
{color:#954F72;text-decoration:underline;}#yiv5827315665 
span.yiv5827315665EmailStyle17 
{font-family:sans-serif;color:windowtext;}#yiv5827315665 
.yiv5827315665MsoChpDefault {font-family:sans-serif;}#yiv5827315665 filtered 
{margin:1.0in 1.0in 1.0in 1.0in;}#yiv5827315665 div.yiv5827315665WordSection1 
{}#yiv5827315665 #yiv5827315665 I’m trying to figure out how to use [loadpanel] 
to load a data file from a subdirectory of a patch, and I’m trying to make this 
patch and its auxiliary files distributable, so I don’t want to have to use 
absolute paths.   I’ve searched the archives on this, and there was a recent 
discussion about how passing [symbol .(  to [loadpanel] didn’t open the 
filesystem at a particularly useful (or at least, consistent between platforms) 
starting directory. What I understand from that discussion is that there is 
still no way to obtain the current patch’s starting directory to enable 
relative-path loading. Is that correct?   If not in vanilla, are there any 
externals?     Phil Stone UC Davis      
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Re: [PD] how to edit PD's colors to make your own theme

[Seb Shader via Pd-list]

Hi,    I thought I'd mention I have a pd mod I've been trying to maintain for a 
couple releases that has color plugins as well as initbang
https://github.com/sebshader/pdnext/releases/tag/0.49-0n
I don't understand git too well but i'm trying to keep the colors mod updated 
with the source generally :-)
-Seb
-Original Message-
From: Lucas Cordiviola 
To: Alexandre Torres Porres ; Dan Wilcox 

Cc: Pd-List 
Sent: Fri, Mar 8, 2019 5:28 pm
Subject: Re: [PD] how to edit PD's colors to make your own theme


On 3/8/2019 9:50 PM, Alexandre Torres Porres wrote:
> what would 'tabbed preferences' be?

Tabs in *one preference window* instead of multiple sub-menus (and many 
windows) from the file/preference menu.

Some images of TK tabbed:

https://www.google.com/search?q=ttk_notebook=isch=univ=X=2ahUKEwikmJD57PPgAhUyIrkGHVm8CLIQsAR6BAgFEAE=1280=699#imgrc=_



Mensaje telepatico asistido por maquinas.

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Re: [PD] open [openpanel] window in the patch folder

[Seb Shader via Pd-list]

Hello,    This is a bit OT but there is of course [ggee/getdir]. I also have an 
object [rootinfo] and [makerpath] (that uses zexy) to make patch-relative 
pathsabsolute. (though not tested on 
windows)https://github.com/sebshader/shadylib
-Seb

-Original Message-
From: Mario Buoninfante 
To: pd-list 
Sent: Tue, Jan 15, 2019 5:44 am
Subject: [PD] open [openpanel] window in the patch folder

Hi,
Would it be possible to use something like the following
[symbol ./(||
[openfolder]
to open the dialog window in the current patch folder?
This syntax works when you save or load files (ie with [textfile]), but doesn't 
seem to work with [openpanel] and [savepanel].
Cheers,Mario
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Re: [PD] Tcl 8.4 /8.5 on mac-ppc

[Seb Shader via Pd-list]

I don't know the specifics but you could use the ox-app.sh script in the mac 
directory of the the source tree after building pd.
e.g. osx-app.sh --tk 8.5.19 as the help option -h shows. (so just cd to the 
/mac directory and run the script)

-Seb


-Original Message-
From: rolfm 
To: Pd list 
Sent: Mon, May 14, 2018 12:36 pm
Subject: [PD] Tcl 8.4 /8.5 on mac-ppc

i would like to use kiosk-plugin with Pd-0.48 on a mac-ppc (OSX 
10.5.8).however, kiosk-plugin needs tcl 8.5 and the Pd-0.48-1.ppc uses Tcl 
8.4.i was looking for info about tcl 8.5 and a mac-ppc,but it appeared to me 
like i had to enter a whole new jungle of terms, versions, websites, libraries 
etc.hopefully someone here is willing to give me a hint:-how to get Tcl 8.5 for 
a mac-ppc-should it then be necessary/possible to compile Pd with this Tcl 
8.5(other then the kiosk-plugin, everything works with my patches on mac-ppc as 
well as Windows 10).thanks in 
advance,rolf___pd-l...@lists.iem.at 
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Re: [PD] suggestion: $0 in messages

[Seb Shader via Pd-list]

>>>What is wrong with [my_selector(--[list]--[$1(







>> for instance, [42(--[list]--[$1( will give 42 not float, 
>> similarly [symbol crabs(--[list]--[$1( will give crabs not symbol 
> >Also it seems reasonable to just have 1 object box for querying a selector, 
> >which is a main element of the pd message environment.


>That makes sense.


>Are you after the literal selector in this case, or the one that the 
>documentation 
>implies should be there? For example, if I feed a list with a single floatarg 
>(e.g., "list 42") to [selector] does it tell me the selector is "float" or 
>"list"?










I would say whatever route would do with it, in this case float


-Seb













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Re: [PD] suggestion: $0 in messages

[Seb Shader via Pd-list]

>What is wrong with [my_selector(--[list]--[$1(


for instance, [42(--[list]--[$1( will give 42 not float,
similarly [symbol crabs(--[list]--[$1( will give crabs not symbol
Also it seems reasonable to just have 1 object box for querying a selector, 
which is a main element of the pd
message environment.





>> On the other hand, having $0 represent the selector would be the most 
>> consistent solution, because you can not get other patch-local variables
or arguments in message boxes, [...]


>I don't understand what the word "solution" means here. If users 
have repeatedly requested msg box $0 to expand to glist's 
ce_dollarzero, why would Pd Vanilla give $0 in msg boxes a 
different function that is incompatible with object box $0?


here "solution" means a good way to resolve $0 in message boxes..
I don't think what users request is necessarily the end all of reasons to 
implement a feature in a language..



and again, the reason that $0 would be different in object boxes and message 
boxes is because everything else already is
different in object and message boxes

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Re: [PD] suggestion: $0 in messages

[Seb Shader via Pd-list]

>From patching I know that it would be far more convenient to be able to 
>reference the patch-local $0 variable in messages. 
Perhaps in that case there should also be a [selector] object that reports the 
selector of a message? getting it using [route] seems
unnecessarily complicated..


On the other hand, having $0 represent the selector would be the most 
consistent solution, because you can not get other patch-local variables
or arguments in message boxes, and yet you can use $1 $2 etc. to refer to the 
elements of an incoming message. So the behavior of dollar signs
in object boxes and message boxes is already separate and have very different 
uses. It almost would seem more confusing to be the same
for just 1 of the dollar sign numbers, yet different for all the others.


-Seb



-Original Message-
From: Jonathan Wilkes via Pd-list 
To: pd-list ; Roman Haefeli 
Sent: Wed, Apr 4, 2018 1:00 am
Subject: Re: [PD] suggestion: $0 in messages




> Why is nobody complaining about not being able to use the third 
> creation argument directly withing a message? What's the fuzz about the

> $0?



$0 isn't part of the argument vector. It's a unique id automatically 
generated for a patch/abstraction which the user happens to access 
through a dollarsign variable.



That locality hack doesn't require that the unique id be fetched by 
an unused dollarsign arg. For example, you could reserve the keyword 
"let" such that a message box with "let token2" would get converted 
behind the scenes to "1003-token2".


When users for a decade have said they wanted $0 in msg boxes, 
they mean that they want to use Pd's notion of send-symbol locality 
inside message boxes. They want that instead of manually querying 
 the value of a reserved dollarsign variable and sending that value 
to the relevant message box in order to get "let" behavior.


Also, since "$0" is already being used for this purpose it doesn't 
make much sense to try to also get "$0" to refer to the selector. 
You'd end up with inconsistent meaning where it fetches the 
selector in msg boxes but not in object boxes. Plus you can 
already get the selector of an incoming message with [list] 
whereas you cannot get an abstraction's selector (which would 
be handy for error reporting). So adding that inconsistency 
would only duplicate existing functionality without adding 
new functionality. 


-Jonathan


> Roman


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Re: [PD] Best way to make file paths relative to the parent patch ?

[Seb Shader via Pd-list]

Hello,
I've made a [rootinfo] object in my library that gives the path, name, and 
relative level of the root canvas.
I also have a [makerpath] object that is supposed to take paths relative to the 
root canvas and transform them into absolute paths but it doesn't seem to work
correctly... I will update it tonight though.


available here https://github.com/sebshader/shadylib
might be in deken for linux and OS X.. not sure (thought the updated 
abstraction will only be on Github)


-Seb



-Original Message-
From: Jérôme Abel 
To: pd-list 
Sent: Sat, Oct 7, 2017 7:35 am
Subject: [PD] Best way to make file paths relative to the parent patch ?


Hi,

To explain myself, i have to describe a practical example
(http://reso-nance.org/public/pd-malinette/test-paths.png) :
- you write an [audio-sampler] abstraction in "abs" directory, which
load soundfiles
- you write a "main.pd" patch where you put this abstraction in the
project directory
- you want to load the "data/snare.wav" sound file with a message
connected to the abstraction

Result : the context of the abstraction is in "abs" directory, so it
can't find "data/snare.wav" (there is no "abs/data/snare.wav" file),instead 
we have to write "../data/snare.wav" relative to theabstraction and not the 
parent patch.

A common solution to deal with that is to add [ggee/getdir 1] inside 
the abstraction, to get the absolute path of the filestarting from the 
upper level (parent patch). But if the abstractionis inside another 
abstraction, it has to be [ggee/getdir 2] and soon ...  But how find the 
right depths of the abstraction ? Theabstraction doesn't know his context 
of use.

I think I will put a [ggee/getdir 10] or greater to be sure to getthe 
parent patch level, but maybe someone has another solution, avanilla 
solution ?


Related PR :

  
https://github.com/pure-data/pure-data/pull/150



+
j.



  
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Re: [PD] going from signals to events?

[Seb Shader via Pd-list]

whoops, looks like he has actually been working on it, not sure why there's a 
separate repo.. https://github.com/ericlyon/lyonpotpourri3.0



-Original Message-
From: IOhannes m zmoelnig <zmoel...@iem.at>
To: pd-list <pd-list@lists.iem.at>
Sent: Mon, Sep 4, 2017 12:16 am
Subject: Re: [PD] going from signals to events?

On 09/04/17 06:23, Seb Shader via Pd-list wrote:
> though it doesn't seem quite ready for 64-bit

iirc, erik kind of refused getting his externals ready for 64bit archs
(with 64bit pointers) until Pd would also use 64bit numbers (doubles)...

i obviously failed to explain the differences.

fgasmdr
IOhannes

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Re: [PD] going from signals to events?

[Seb Shader via Pd-list]

Eric Lyon's Lyonpotpourri library should be mentioned 
https://github.com/pd-projects/lyonpotpourri although seems like some code 
needs to be cleaned up, I'm getting segfaults with Pd-Extended and a custom Pd 
that uses a bit of Pd-extended code


He has many signal sequencing objects in the library though and it seems to 
work fairly well with vanilla, though it doesn't seem quite ready for 64-bit


-Original Message-
From: Ali Momeni



hello friends,


what are your favorite objects for going from signals to events?


specifically, i'd like to make a sample accurate / audio-driven sequencer.  I'm 
looking for something like max's "seq~" object, which outputs events when a 
phasor input in its inlet crosses various thresholds.


Any ideas?


-ali

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Re: [PD] Pd 0.48.0test5 Help Browser Issue

[Seb Shader via Pd-list]

Dang That was it, I had fixed that but forgot for the second column. I updated 
the ticket
https://sourceforge.net/p/pure-data/patches/579/


and attached the patch and the updated file (goes with the tcl files in the pd 
distribution)
-Seb



I'm also on Windows but I'm not having the issue. This is probably because of 
the white-space in "Program Files (x86)".
I'm not an expert, but it could be that.


On 7/23/2017 11:39 PM, michael noble wrote:


Found an issue with the latest build, though it could be in earlier builds. 
When using the help browser, clicking on items in the right column results in 
errors:



wrong # args: should be "::helpbrowser::dir_navigate dir count window x y"
wrong # args: should be "::helpbrowser::dir_navigate dir count window x y"
while executing
"::helpbrowser::dir_navigate C:/Program Files (x86)/Pd/bin/extra/sigmund~ 2 
.helpbrowser.frame.root1 39 10"
(command bound to event)



Items open normally from the left column.


 

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-- 
Mensaje telepatico asistido por maquinas.

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helpbrowser.patch
Description: Binary data


helpbrowser.tcl
Description: Tcl script
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Re: [PD] Chebyshev waveshaper

[Seb Shader via Pd-list]

I didn't say that it was like cheby, I just mentioned that cheby already 
existed.
The point is to control a crossfading of harmonics at audio rate.
In cheby~ you can control the weight of harmonics at message rate, but you can 
only set the order by creation 
argument.
In tcheb~, you can only have 1 harmonic (or a crossfade between 2 executive 
harmonics) but you can choose the harmonic to be anywhere up to 255 at signal 
rate.
I just happen to like the sound of the order of polynomial being rolled through 
a linear crossfade at signal rate, which you cannot do with cheby~.



-Sebastian



-Original Message-
From: Alexandre Torres Porres por...@gmail.com
To: sebfumaster sebfumas...@aol.com
Cc: Alexandros Drymonitis adr...@gmail.com; pd-lista puredata pd-l...@iem.at
Sent: Sat, Jun 6, 2015 2:14 pm
Subject: Re: [PD] Chebyshev waveshaper


 
Hi there, if you can't control the strength of harmonics like cheby, it's not 
like cheby~ at all, and I actually fail to see the point here.  
   
  
  
btw, cheby~ should have the option to generate normalized tables for 
waveshaping, it's hard to work with it when it doesn't, you can always blow it 
up easily.  
  
   
  
  
cheers  
 
 
  
  
2014-04-21 14:39 GMT-03:00sebfumas...@aol.com:   
   
Sorry bout that, all it is is a number box connected to a line~ (to make it 
smooth)
  
  It should be in the zip now. Thanks for the heads up 
  
  
  
  
-Sebastian  
   

 
 
-Original Message- 
 From: Alexandros Drymonitis  adr...@gmail.com 
 To: sebfumaster  sebfumas...@aol.com 
 Cc: PD-list  pd-l...@iem.at 
 Sent: Mon, Apr 21, 2014 8:20 am 
 Subject: Re: [PD] Chebyshev waveshaper 
  
  
   

Opening tcheb~-help.pd I get this in the console: 
 smoother~
 ... couldn't create
 

 There's a smoother~-help.pd included but no smoother~.pd or 
smoother~.pd_darwin or a .c file...   
   
   
   


On Mon, Apr 21, 2014 at 3:30 AM, sebfumas...@aol.com wrote:   
 
 
  Hi all,   
If anybody's interested I made a chebyshev wave shaper 
external. it's on the pd forum
http://puredata.hurleur.com/sujet-10371-chebyshev-waveshaper-controlled-signals 
  . I know there's already creb/cheby~ but this is slightly 
different because you cannot set the harmonics but you can control the order 
with a signal. adjacent orders of polynomial are interpolated with the pd 
cosine table which I have no idea how to use like the cos~ object but I did it 
anyway and it seemed to work.  
   
   
   
   
Suggestions would be appreciated, this is only my 3rd small c 
program  
   
   
   
   
-Sebastian  
  
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Re: [PD] hardcoded filters at 44100

[Seb Shader via Pd-list]

actually this is not the case; the coefficient and samplerate are updated when 
the dsp method is called, (this is also the case for many vanilla objects that 
require info about samplerate, like phasor~, osc~, etc.


-Sebastian
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Re: [PD] How to navigate a long sound file in vanilla PD

[Seb Shader via Pd-list]

In the meantime, the onset inlet could be a signal, and the phasor could just 
be set up like this since onset is just a sum:


[phasor~]
|   \
|\
[*~ size/2]
|  \
|  [*~ size/2]
|  |
[tabread4~]
|
64-bit output


I made a version of nusmuk's tabread4c that does this


-Sebastian
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Re: [PD] Updating Pd-Extended

[Seb Shader via Pd-list]

It seems that the main/only thing to do in order to update the Pd-extended core 
is to update vanilla to incorporate the GUI rewrite stuff, as well as closebang 
and initbang (what other things?).
It seems that someone just needs to go through and copy all of the code 
directly, deciding which GUI things to keep and which to discard


-Sebastian
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Re: [PD] clear delwrite~?

[Seb Shader via Pd-list]

Oh I forgot to include the abstractions for the help files for these but it's 
pretty self-explanatory. The makefile should be edited with the correct paths 
to compile. The original tabread4c~ (hermite interpolation) was from nusmuk by 
Cyrille Henry___
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Re: [PD] Updated Pd-Extended

[Seb Shader via Pd-list]

Hello again list,


What do y'all think of the idea of releasing Pd-extended both as a 
core pd with no libraries added except maybe the libdir and hex loaders and 
as a version with multiple libraries (2 release stages)? Perhaps it's been 
discussed. the thing I enjoy about Extended is the features it adds to 
pd-vanilla, and this way people can just keep the same libraries installed in 
the same places and switch between vanilla and extended easier. In my 
experience I never need/want to use most of the arbitrary libraries included 
and/or loaded on startup and could easily download and install the ones I do 
want. I also see the appeal/logic of using a standardized set of libs though.


seems like a reasonable way to develop it too... everyone focusing on the core 
and then working on their own libs for a bundled release.


Also about import/saving libraries to load on startup: wouldn't it make more 
sense if either the list were editable or there were no list? Strange that 
users get this arbitrary list to load on startup, (not even all the libs 
included in PdX) without being able to edit it, a set of libs that they never 
have to [import], but then they're expected to [import] everything else unless 
they manually edit the preferences file (quite confusing for most users)?


Btw I also have a bit of time and know a little bit of c and tcl, i'd be glad 
to pitch in where i can when there is a concrete plan (list of to-do's) of how 
to move forward with Pd-extended.


   -Sebastian
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