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Old 29th September 2012, 09:26 AM   #1
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Default High end all digital dsp crossover ?

Is anyone building a state of the art all digital dsp crossover ?
The idea is to supply ones own digital reciver (usb), favorite
dac's and analog output stages.
If there is none, are there any ideas of how such a device should
be put together ? What dsp chip etc.
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Old 29th September 2012, 11:20 AM   #2
ds23man is offline ds23man  Netherlands
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diyAudio - googlyone
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Old 29th September 2012, 12:35 PM   #3
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I have a DSP crossover: a minidsp 2x8. It is a very versatile and incredibly good sounding solution for the money. Someone asking for the ultimate may disagree of course, but they also offer a fully digital solution that you could combine with some very nice DACs, or further fir filtering before the DAC for a truly 'high ended' solution..

Hth.

Jai
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Old 29th September 2012, 12:46 PM   #4
qusp is offline qusp  Australia
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funny I was just talking about the lack of this. manufacturers always throw in a dac that takes up room, costs money and uses power for functionality I neither need or want. mini dsp resamples everything...badly. messes with my Chi
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Old 29th September 2012, 02:36 PM   #5
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"Qusp", I saw that post and I could not agree more.
I thougth it could use some further discussion
I bougth a Minidsp 2x8 and sold it half an hour after I
recived it. I'm not going to elaborate on that any further
but it didn't meet my expectations.
I'm eagerly awaiting another dsp crossover son to be released
and even if I'm of course will try it as is, I will most likely go for
a "hot rod version" similar to what "Qusp" has been writing about
in the same thread. DSP Xover project (part 2)
Maybe it will meet my expectations as is and nothing would make
me happier since I really don't need another project.

I read trough most of what Googlyone has done and that looks
interesting as well, but is it the absolute best of what's possible today ?
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Old 29th September 2012, 02:43 PM   #6
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I really have no clue in this field, that's why I'm asking
But after some googling I found this XS1-G | XMOS
Is this a contender for what's "top of the line" today ?
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Old 29th September 2012, 03:03 PM   #7
qusp is offline qusp  Australia
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or this? :evil:
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Old 30th September 2012, 01:29 AM   #8
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Quote:
Originally Posted by dahlberg View Post
The idea is to supply ones own digital reciver (usb), favorite
dac's and analog output stages.
If there is none, are there any ideas of how such a device should
be put together ? What dsp chip etc.
Were you thinking of a digital-only crossover with multiple SPDIF outputs and one digital input?

I've been thinking about a high-end solution myself and figure that its best not to have external DACs, rather integrate the filtering closely with the DACs. If you can choose external DACs its very easy to screw up the time alignment between channels by using different ones.
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Old 30th September 2012, 08:31 AM   #9
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Quote:
Were you thinking of a digital-only crossover with multiple SPDIF outputs and one digital input?
No I was thinking of I2s input, one but maybe there would be need for a second
as well. 8-10 channels I2s output's, all parts on separate clocks or if possible in
syncronous mode.

One idea, Loriens usb reciver, the high end dsp-xo, a number of Buffalo 3's
(or Acko's) followed by Broskie unballancers for analog output.
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Old 30th September 2012, 09:07 AM   #10
qusp is offline qusp  Australia
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no has to be digital only with i2s in/out the point is to allow people to use their dac/s of choice and not tie people down to buying something they dont need. all parts should use the same master clock, or at least all the dacs use the same clock, which means a fanout buffer. in an ideal world where we could all agree on the best dac I might consider selling what I have and using something integrated, but we all know how likely that is.
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