this is a quick explanation of the role of abstractions in pd, and why it is useful to use $0, $1, etc.. inside these abstractions.
ok. say you want to create a very simple sample player. you'd do something like this.
[0] <-- gui bang object #1
-
-
"In other words, is naming the objects $1-whatever and $2-whatever any different from naming them whatever1 and whatever2?"
Absolutley - 1-whatever will not work. $0-whatever works because $0 is special, it gets replaced bu a unique per patch/abstraction number. $n is the nth parameter to an abstraction.
sory jumping in, that was addressed to you Nestor, elaborate for brett with an example maybe, i need my bed.
Use the Source.
-
brett, the answer to your question is at the end of what i wrote.
if u make an abstraction called [dollars]
then, for [dollars 5 bananas] $1 = 5 and $2 = bananas
so $1-whatever = 5-whatever , and $2-whatever = bananas-whatever.
-
Great! I second that, I didn't understand this stuff well in the beginning. Coming from a MAX/Reaktor background I didn't get it. But now I get it and like it more! Thanks for the concise clarification.
-
thanks for this, I have been trying to figure this out with a modified sample/looper from the examples e.g: how to have 1 to 100 of these independently.
However, I must being doing something wrong in this example, because after I graph and add the $0....I can't load a sample, when I try I get "0-my-sample: no such table"
as far as I can tell I have followed your text to a tee, but I must be overlooking something simple.
thanks,
db -
I guess that's what i meant in my previous comment. When you try to use $0 objects within messages, you should "push" the $0 inside. For instance, assuming you have a table called $0-sampler1, the following won't work :
[bang]
|
[set $0-sampler1(
|
[tabread4~]instead, you should do this :
[bang]
|
[pack $0]
|
[set $1-sampler1(
|
[tabread4~]This way you push the $0 value (which is actually internally replaced by a number) inside the message. Remember that the $ variables inside messages are something completely different than the $ for objects parameters.
|] [] |.| ][|-| -- http://soundcloud.com/domxh
-
can you relate this to hardoffs sample, re; why no such table response when I am following his directions?
thanks..
db -
if you follow from my example like this, it will definitely work.....
[0] <-- bang #1. right click for properties and set the send as $0-open
[0] <-- bang #2. right click for properties and set the send as $0-play[r $0-open]
-
it works now, I don't know what the problem is/was. I have been spending the last few hours trying to get a solid installation, so maybe this was part of it.
thanks.
db -
before finding out about all this $1- and $0- stuff I'd already put together an abstraction for playing a drum sound inside a drum machine. because I knew I wanted several copies of this within the drum machine I assigned "d1" at the beginning of each send or receive object in the drum abstraction, and then did find/replace in a text editor to change it to "d2", "d3", "d4" etc to make several different copies.
Now that I realise you can just have one copy and use $1 and creation arguments to generate further copies, I have tried to use find/replace to replace "d1" with "$1-". Sure enough the replacement operation works, but when I try to open the amended abstraction again in pd, it just opens a blank canvas?!
In the text editor everything looks exactly the same except for the d1 has changed to $1- so I just can't fathom what the problem could be.
Anyone have any suggestions?
I've attached the 2 versions for reference: 'drum1' is the original with "d1", and 'drum' is the amended version with "$1-" (except you won't be able to see anything with 'drum' unless you open it in text editor!)
-
...the other abstraction
-
you need a forwards slash before the $ sign if you go the textedit route
so $1-whatwhat -> \$1-whatwhat
attached fixed version seems to work fine:
-
Thanks mate! If you got paid for all the help you give out, you wouldn't be hard off!!
the slash is specifically for $ signs is it? i presume to distinguish it from also being used in messages?
-
i think it's because the $ symbol has another meaning in the software that pd runs on top of.
i'm more than happy to help anyone here if i can. certainly a much better use of my time than visiting music boards that are over-run with idiots being trolls to seek attention.
-
Is there any way to use $1 to select files for loading, for example:-
[atom] (number box)
|
[pack $1]
|
[read -resize /Samples/DM/Boss_DR55/DR55_$1.wav drum1array(
|
[soundfiler]This doesn't seem to work because $1 is not at the beginning of the file name, or because it is embedded in the filename.
I'm just thinking that, if only we could change a small part of the filename remotely like this, then we'd be able to load samples easily just by scrolling a number box or moving a slider (as long as the sample files are all named with numbers).
-
It's better to use the [makefilename] object for this :
[atom] (number box)
|
[makefilename /Samples/DM/Boss_DR55/DR55_%d.wav]
|
[read -resize $1 drum1array(
|
[soundfiler]|] [] |.| ][|-| -- http://soundcloud.com/domxh
-
Great! Thanks alot Domien
-
hey guys,
thanks for that little tutorial.
i tried the example in a little sample looper, but i only get that error:
0-sample: no such table
can someone look inside my patch and tell me what is going wrong?
-
you need to put [f $0] in an object box, not a message box [ ( . $0 messages don't work in message boxes. Run the output of [f $0] into the right inlet (the float inlet) of [pack s f] - then everything works.
-
grrrmlkrr,
thanks a lot, what a stupid error.
now it works great.
-
thank you all for the excellent information
everything is working well except my loadbang doesn't seem to fire when my abstraction is created from a message box connected to a s pd-window.pd, so unless i manually create the abstraction object in the pd window, i'm not getting the loadbang-$x output i need.
i.e., if i open the message-created abstraction and bang the test bang i have loadbang routed through, i get my output. if i put an object and create my abstraction that way i get my output without having to do anything else (like i expect, and want it to be).
what gives? is there something fundamental that i'm missing about message created abstractions or obj messages? there are no $x's in the abstraction name/argument list, so a missing slash in my obj creation message can't be the problem, right?
the patch i'm working on will be running on a library in objective c (http://gitorious.org/pdlib/pages/Libpd) so i'm not sure if i will have the same problem when the abstraction is called from a code-sent message, but i can't imagine why it would behave any differently than in the pd window environment.
hopefully this is just something i'm overlooking.....?
any feedback is most welcome
