On Fri, Sep 9, 2011 at 4:37 PM, Patrice Colet colet.patrice@free.fr wrote:
----- "Rick T" ratulloch@gmail.com a écrit :
On Fri, Sep 9, 2011 at 2:46 PM, Patrice Colet < colet.patrice@free.fr
wrote:
Hello, I'm not a C expert but I see errors in your code
----- "Rick T" < ratulloch@gmail.com > a écrit :
Greetings All
I'm having trouble getting my external to work, It compiles with 5 warnings sineq.c:48: warning: unused variable ‘x’ sineq.c:49: warning: unused variable ‘in1’ sineq.c:50: warning: unused variable ‘in2’ sineq.c:51: warning: unused variable ‘in3’ sineq.c:52: warning: unused variable ‘in4’
in http://iem.at/pd/externals-HOWTO/node6.html it's not a t_float but a t_sample for using those variables
True but the variables in my external are floats not samples like in the example pan~ which takes in 2 different signals. I'm taking in 4 different floats (numbers)
Allright, maybe you should directly name your variables amp freq phase and vertoff instead of in1 in2 in3 and in4
Changing these just caused more errors I think the *in and *out are a pd reserved class to create inputs and outputs
It does a "make" successfully but I get this warning message /usr/bin/ld: warning: cannot find entry symbol xport_dynamic; defaulting to 00000000000007f0
it's certainly caused by your makefile during linking, it's rather export_dynamic, you've certainly made a typo ^^
I thought so to but when I take a look at the make file it looks fine here's a link to the code in (pastebin)
Okay, in fact you should write:
-Wl,-export-dynamic to pass it with gcc
This caused compilation to fail so I had to take it out
but when I try and add it in PD it says "couldn't create". I've
looked
at the pan~ tutorial and the d_osc.c file as recommended, which did help. I tried to take pieces from the two which I thought were applicable to my situation but I'm still having some issues.
maybe a little look into bassmu~ source code could also be interesting
I looked into it but this seems more complex than the d_osc.c file I need easier at the moment not more complex
Do you know the name for the source file or know where I can find it? I typed in bassmu~ in PD and nothing came back.
ah sorry I've made a typo :D it's bassemu~
you can get it in pd-extended externals sources
Here's a link to the workflow (dropbox) http://dl.dropbox.com/u/6576402/questions/pd/Sine_EQ_Diagram.jpg
Here's a link to the C code online (pastebin) http://pastebin.com/9rK3szUE
My external is a reproduction of the sinewave equation with 4 inputs and one output my logic is to have 4 inlets one for the frequency,amplitude,phase and vertical offset and an output for the created signal. Granted this isn't the final equation but this will help me understand how to create the full equation once done. If you want to see the full equation I'll be using here's a link to it
below.
Basically it's a 1 second periodic signal with the sample rate at 44100 which the equation gives me control over the frequency,amplitude,phase and vertical offset, which will be controlled by a usb midi controller.
Another question I have is what do I use for the t (time) for my
final
equation is that the t_sample object in PD? or do I need to create a for loop counting from 1-44100 for a 1 second 44100 sampled
equation?
http://dl.dropbox.com/u/6576402/questions/eq1.txt
PS: I'm compiling on ubuntu 10.04 using gcc
On Sun, Sep 4, 2011 at 12:13 PM, Martin Peach < martin.peach@sympatico.ca > wrote:
On 2011-09-04 16:52, Rick T wrote: ...
I've been able to find instructions on how to create a hello world C-external but not one that creates a simple sine wave from a
sinewave
equation like A*sin(w*t+p) ( https://secure.wikimedia.org/ wikipedia/en/wiki/Sine_wave ) Does anyone have one or know where to find one.
The canonical reference is here: http://iem.at/pd/externals- HOWTO/node6.html You just need to plug your equation into the perform routine. Also check the source for osc~ in d_osc.c of the Pd source, which
uses
a fancy 32-bit float cosine table scanning method that was useful
when
it mattered but is getting obsolete as a call to sin() is probably just as fast nowadays.
Martin
Pd-dev mailing list Pd-dev@iem.at http://lists.puredata.info/listinfo/pd-dev
-- Patrice Colet
Aloha and thanks for the help every bit helps --
-- Patrice Colet
aloha Rick