Convolution Reverb for Daisy Pod

emarx · December 13, 2020, 8:55am

Dear Daisy community.

I am an acoustic engineer and sound artist. I am currently participating in an open project to register acoustic heritage. I would like to be able to implement a convolution reverb in my Daisy pod so that I can have a standalone device that can be loaded with various impulse responses from different places that I record.

I am not a programmer but from what I have been researching it could be done directly from a .cpp code or through gen in max. I have found some reference codes but they would need to be translated for the Daisy environment.

github.com

HISSTools/HISSTools_Impulse_Response_Toolbox/blob/master/HISSTools_IR_Toolbox_Objects/multiconvolve~.c


#include <ext.h>
#include <ext_obex.h>
#include <ext_obex_util.h>
#include <z_dsp.h>

#include <HIRT_Buffer_Access.h>
#include <HISSTools_Multichannel_Convolution/multi_channel_convolve.h>


// Object class and structure

void *this_class;

#define MAXIMUM_MSP_CHANS 64


typedef struct _multiconvolve
{
    t_pxobject x_obj;

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github.com

CICM/HoaLibrary-Max/blob/master/MaxCommon/c.convolve_tilde.cpp

/*
 // Copyright (c) 2012-2015 Eliott Paris, Julien Colafrancesco & Pierre Guillot, CICM, Universite Paris 8.
 // For information on usage and redistribution, and for a DISCLAIMER OF ALL
 // WARRANTIES, see the file, "LICENSE.txt," in this distribution.
 */

/**
 @file      c.convolve~.cpp
 @name      c.convolve~
 @realname  c.convolve~
 @type      object
 @module    hoa
 @author    Julien Colafrancesco, Pierre Guillot, Eliott Paris.
 
 @digest
 A zero latency convolution reverberation processor
 
 @description
 <o>c.convolve~</o> is a zero latency convolution reverberation processor.

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any help is welcome
thank you very much
EMARX

antisvin · December 13, 2020, 2:42pm

There’s some work in progress to add convolution support to Daisy, see Fast Convolution for DaisySP

AXP · December 14, 2020, 1:17am

Indeed, your use case will soon be supported by Daisy SP library natively.
Hopefully our implementation is going to be much more efficient than the one pointed above, but nevertheless thanks for the link.

emarx · December 14, 2020, 9:02am

Thank you very much for the link to the project. I just read it and of course, one of the few things I know about it is that one of the greatest difficulties of a convolutional algorithm in real time is the way in which the process is divided and which sections are made in the time domain and which in that of frequency. After that you have to code. None of these areas is my field.
As I was saying, I am participating in several projects related to the importance of acoustic heritage, its rescue through libraries of impulse responses and the potential of auralization in the field of sound art. I share a link to a project in which I am currently helping:

Generally, I design my own Max for Live devices through graphic programming and external such as Hiss tools or HOA for the pieces and performances we do. And of course, one of my goals was to build a standalone device with my daisy pod so as not to depend on a computer in these processes in the same way that there are paid electronic devices such as EPSY
https://www.amazon.com/-/es/Logidy-EPSi-Convolution-Processor/dp/B00WVP08EU/ref=cm_cr_arp_d_product_top?ie=UTF8
or the mythical QUANTEC QRS

Anyway, I eagerly hope that your project will bear fruit and I would love to be able to help from my precarious knowledge.
Many Greetings EMARX