4 different ways to obtain a "pure digital DSP" - diyAudio
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Old 21st July 2012, 11:29 AM   #1
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Lightbulb 4 and half different ways to obtain a "pure digital DSP"

If you think a modular conception is better (to follow the progress of DAC without changing the DSP... or the contrary ),
and it is obviously better (and so more elegant for the mind)
to separate DAC from the digital filtering part that is a nest of electric perturbations,
then to my knowledge there are four different ways to goal this aim
(three one I get thank to nice poeple I "met" on the net).


SOLUTION 1 : thanks to pguerin of a French forum ---------------------------------------------------------------------------------------------------------------
For 150€ (+66€ taxes !!!) the miniDSP NanoDIGI : nanoDIGI 2x8 K | miniDSP
No facade (needs a PC to communicate, but small is beautyfull ! so cute !!! )
You have got 2 more output than a DCX (interesting for 2x3ways+subwoofer+bodyshaker)

SOLUTION 2 : thanks to www.dcx2496.fr ( and his kindly answer to my mail )
-----------------------------------------------------------------------
For 25€ (if you have already a Behringer DCX at 230€ !), and you are a bit used to electronic,
you can tweak the DCX to shunt the DAC quite easily (3 DIT4096 found on ebay cost 5€ for each)

SOLUTION 3 : thanks to Almat of the same French forum -------------------------------------------------------------------------------------------------------
For 1000€ to 1500€ Click the image to open in full size. there is a lot of professional (that is a proof that "full digital" DSP is a good idea)
Xilica XD, Electrovoice DC one, DBX, ...
It really expensive but it's allowed FIR filtering

SOLUTION 4 : my dream, and the future, in my opinion
-----------------------------------------------------------------------------------
several DAC directly linked to digital outputs of a PC.

SOLUTION "5" : not exactly a "pure" DSP because it uses resistors to make an addition on the different signals...
------------------------------------------------------------------------------------------
... but a funny and amazing experience made by abraxalito : a"home made DSP" built with lots lots of DACs
Open Source DSP XOs

Last edited by FroggySeven; 16th August 2012 at 06:15 AM.
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Old 21st July 2012, 12:13 PM   #2
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You , There
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Old 21st July 2012, 12:23 PM   #3
erin is offline erin  Australia
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Are you writing about active crossovers or digital EQ running to external dac?
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Old 21st July 2012, 12:24 PM   #4
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It's a small world ! Fortunately, I was only writing nice things about you ...

In fact, I asked to the guy of the Filtrage actif numérique et très haute fidélité
if I knew Dominique's forum, and if I could advise me another forum...

Inconvenient : it's bigger, here. Advantage : it's bigger, here.


Erin : it was about activ crossover. But I presume a DSP or a PC could have a fonction of digital EQ too ???

Last edited by FroggySeven; 21st July 2012 at 12:27 PM.
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Old 21st July 2012, 12:35 PM   #5
erin is offline erin  Australia
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What exactly do you want to know?


Yes a pc can work as active crossover
DSP Loudspeaker Processing Tools for PC.
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Old 21st July 2012, 02:00 PM   #6
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Are the developpement and the support of the products from thuneau.com still active ? See the latest news : 2007 and 2011 ...

Another sofware for active crossover is Ultimate Equalizer:

Ultimate Equalizer

Thread :
The Bodzio Ultimate Equalizer

But IMHO miniDSP products are more easy to use and less expensive.
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Old 21st July 2012, 02:01 PM   #7
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In fact, for once, I wasn't looking for an advice, but was just sharing few things I know.

And of course, I was curious of other opinions about what I wrote.

But yet, you've given me an interesting link !
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Old 21st July 2012, 02:27 PM   #8
erin is offline erin  Australia
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Sharing. Ok!
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Old 21st July 2012, 03:02 PM   #9
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Quote:
Originally Posted by FroggySeven View Post
...and it is obviously better (and so more elegant for the mind)
to separate DAC from the digital filtering part that is a nest of electric perturbations,
I dunno I'm not at all convinced that its better to separate the DAC from the XO. What about if you could buy a DAC (at a reasonably cheap price) where you could customize the frequency response yourself? Would that be interesting in any way ? its the idea I'm playing with right now, btw

Also what if the XO had no DSP in it at all - that neatly circumvents the 'nest of vipers' (sorry, 'electronic peturbations') ?
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Old 21st July 2012, 06:01 PM   #10
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Quote:
In fact, for once, I wasn't looking for an advice, but was just sharing few things I know.
Have you used the search engine of the forum with the keywords miniDSP, DCX2496, DAC maybe

The results will be lots of interresting threads
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