convolution and reverb

Aug 22, 2008 at 9:05pm

convolution and reverb

Hi list,

I made a convolution example (see the file here attached).

It seems to work in frequency domain, that is multipling the
two spectra.

But I should develop a kind of convolution used to obtain
reverb, with acoustic environment. If I do
that with the example here attached (using a
delayed impulse responce of a reverb) it doesn’t work
properly, that is no reverb we hear.

Could I get some suggestion please?

Thanks a lot.
AP

#39404
Aug 22, 2008 at 9:23pm

Hmmm… not sure why the attachment doesn’t show up on the forums and I’m not subscribed to the list anymore(my inbox was too flooded) so I don’t get emails and can’t really explain how to attach from the email list. but at least, your topic is now a new one and hopefully someone else will be able to help soon… (if you feel up to it, you could also try visiting cycling74.com, viewing the thread you created here on the forums, and then attach from another reply here, but otherwise, i’m not seeing it here). sorry again but it’s now its own topic so people will see it…

alternately, you could also copy-compress your patch: select all objects in your patch, from the edit-menu select “copy-compress” then paste it as text within your email message and people can take a look at it from that….

hope that helps.

#138746
Aug 22, 2008 at 9:28pm

just as an example, the below text is a copy-compressed maxpatch, if you copy all the text(starting with the beginning line:

– Pasted Max Patch, click to expand. –

“)
and paste it into a patcher it will show up as a patch which just has a object attached to an ezdac~ object:

– Pasted Max Patch, click to expand. –
#138747
Aug 23, 2008 at 10:04am

#138748
Aug 23, 2008 at 11:30am

#138749
Aug 23, 2008 at 3:13pm

Ah, ok, as long as other people got it, someone should be able to help. Sorry for the confusion. Best of luck.

#138750
Aug 23, 2008 at 4:36pm

On Aug 23, 2008, at 3:04 AM, Andrea Pagano wrote:

> We could ask to the others members of this mailing list:
> did you receive the file attached I sent ?????

This is a long standing problem with the email< ->forum gateway:
– Attachments via email don’t make it to the forum.
– Attachments done through the forum interface make it to both the
forum and the mailing list.

-C

Chris Muir
cbm@well.com

http://www.xfade.com

#138751
Aug 24, 2008 at 6:23pm

Andrea Pagano schrieb:
> But I should develop a kind of convolution used to obtain
> reverb, with acoustic environment. If I do
> that with the example here attached (using a
> delayed impulse responce of a reverb) it doesn’t work
> properly, that is no reverb we hear.

Your impulse is most likely way longer than a single fft frame.
Unfortunately creating a convolution reverb isn’t quite that straight
forward…

But you can search the maxobjects.com. I think there is one convolution
external flooding around, but I didn’t try it…

Stefan


Stefan Tiedje————x——-
–_____———–|————–
–(_|_ —-|—–|—–()——-
– _|_)—-|—–()————–
———-()——–www.ccmix.com

#138752
Aug 24, 2008 at 11:21pm

Quote: Stefan Tiedje wrote on Sun, 24 August 2008 20:23
—————————————————-
> Andrea Pagano schrieb:
> > But I should develop a kind of convolution used to obtain
> > reverb, with acoustic environment. If I do
> > that with the example here attached (using a
> > delayed impulse responce of a reverb) it doesn’t work
> > properly, that is no reverb we hear.
>
> Your impulse is most likely way longer than a single fft frame.
> Unfortunately creating a convolution reverb isn’t quite that straight
> forward…
>
> But you can search the maxobjects.com. I think there is one convolution
> external flooding around, but I didn’t try it…
>

yes, it is called tconvolution~ and you can find it (as well as a vst) through http://www.zippernoise.net/.

i’ve used it in max 4.6 on osx 10.4 and it.. ehm.. worked.

#138753
Aug 25, 2008 at 3:53pm

http://www.zippernoise.net/data/index.php?
option=com_content&task=view&id=14&Itemid=42

elt@altern.org
http://pan-etc.net

#138754

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