bertacchimmb

i'm gettin mad with impulses convolution!

i need do do basically 2 thing: the first one is to make a cabinet simulation for my virtual guitar processor and the second one is to get a goog reverb by using famouses impulses respnse (like lexicon i.e.)..

i studied the tutorial 26 with no results al all..

i already read all the discussion about this (till 2000 -_-") but nothing..

so, some of you can help me with REALTIME convolution as i've just explained?

hi!
i'm gettin mad with impulses convolution!

impulses-heavy-problems

No such things are built in Max. If what you want is a good cabinet simulation and a good reverb, you may be better off looking for third party plugins, specialized in each field.

No such things are built in Max. If what you want is a good cabinet simulation and a good reverb, you may be better off looking for third party plugins, specialized in each field.
J-F.


Jean-Francois Charles wrote on Mon, 16 March 2009 13:34

i read something on this forum about convolution.. i mind that is possible for max to do this..

Jean-Francois Charles wrote on Mon, 16 March 2009 13:34No such things are built in Max. If what you want is a good cabinet simulation and a good reverb, you may be better off looking for third party plugins, specialized in each field.
J-F.

i read something on this forum about convolution.. i mind that is possible for max to do this..


Tutorial 26 is a very important one. Necessary if you want to work in spectral domain and use [pfft~]. The tutorial shows a simple convolution between 2 signals (convolution = multiplication in spectral domain). But it doesn't tell you anything about reverbs, and convolution reverbs. Building such a reverb is not straightforward. You will find in the archives a discussion precisely on convolution reverbs:

https://cycling74.com/forums/index.php?t=msg&goto=61070

Jean-Francois Charles wrote on Tue, 17 March 2009 10:43

mmmm.. so you mind that is better to use a vst for convolution reverb?

and what's about using impulses for simulate cabinet?

Jean-Francois Charles wrote on Tue, 17 March 2009 10:43Tutorial 26 is a very important one. Necessary if you want to work in spectral domain and use [pfft~]. The tutorial shows a simple convolution between 2 signals (convolution = multiplication in spectral domain). But it doesn't tell you anything about reverbs, and convolution reverbs. Building such a reverb is not straightforward. You will find in the archives a discussion precisely on convolution reverbs:

You can use buffir~ (time domain convolution) for processing impulse of the cabinet.

For the reverb in MAX, try the external called tconvolution~.

You can use buffir~ (time domain convolution) for processing impulse of the cabinet.
For the reverb in MAX, try the external called tconvolution~.

Salvator wrote on Wed, 18 March 2009 01:21

Salvator wrote on Wed, 18 March 2009 01:21Hi,

bertacchimmb wrote on Wed, 18 March 2009 07:25Salvator wrote on Wed, 18 March 2009 01:21

mmmm.. really interesting.. i compare my result with the most important ir vst convolver and it sounds really good..

but..... how to extend the buffir~ over 256 sample? all my ir sample are about 1024 sample long!

bertacchimmb wrote on Wed, 18 March 2009 07:25Salvator wrote on Wed, 18 March 2009 01:21Hi,

Convolving a guitar with an ir from a guitar amp/speaker would get identical results in any convoution plugin, when not additional filtering etc is applied.

That is one reason some people prefer algorithmic reverbs ? , they create random movements that is impossible in IR reverbs.

Isnt all convolution reverbs the same?
Convolving a guitar with an ir from a guitar amp/speaker would get identical results in any convoution plugin, when not additional filtering etc is applied.
That is one reason some people prefer algorithmic reverbs ? , they create random movements that is impossible in IR reverbs.

What I meant is that the live convolution of 2 signals is a straightforward thing with pfft~, whereas building a convolution reverb is more complicated. If you have a simple patch doing convolution reverb with pfft~, please share!

The subject was discussed on this thread as well:

https://cycling74.com/forums/index.php?rid=0&S=3158b3a0b0dc96337a5fb434d0d993a8&t=msg&th=23568

What I meant is that the live convolution of 2 signals is a straightforward thing with pfft~, whereas building a convolution reverb is more complicated. If you have a simple patch doing convolution reverb with pfft~, please share!
The subject was discussed on this thread as well:https://cycling74.com/forums/index.php?rid=0&S=3158b3a0b0dc96337a5fb434d0d993a8&t=msg&th=23568

about buffir~: i noticed that the max slice is 256 frames.. so i used lots of buffir~ with delay~..

i attach you a screenshot of my idea.. is quite simply i mind.. i tested it with a click~ and i noticed that the response is 768 sample.. i can't undestand why the last buffir~ is not read at all..

am i right on this patching based an buffir~+dealy~?

about buffir~: i noticed that the max slice is 256 frames.. so i used lots of buffir~ with delay~..  

maybe I dont understand this, but is convolving a sound with a reverb tail any different than convolving with any arbitrary sound?

i mind that using buffir~ is quite impossible.. i need something like 400 buffir~+delay~ to get someting usable.. -_-"

other ways to get something similar and usefull?

what's about reverb ir?
i mind that using buffir~ is quite impossible.. i need something like 400 buffir~+delay~ to get someting usable.. -_-"

other ways to get something similar and usefull? 

"For the reverb in MAX, try the external called tconvolution~."

And yes, delay~+ buffir is the way for initial cab simulation.

Also, depending on your impulse, you may need to performa some windowing to avoid artifact.

And yes, delay~+ buffir is the way for initial cab simulation.
Also, depending on your impulse, you may need to performa some windowing to avoid artifact.

Salvator wrote on Mon, 23 March 2009 07:03

mmmm.. i use windows.. your external is only for osx.. this is the reason why i ignored your forst suggestion..

Salvator wrote on Mon, 23 March 2009 07:03from my first post :

Impulses HEAVY problems!