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-   -   Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project.html)

Tranquility Bass 2nd October 2015 01:14 AM

Quote:

Originally Posted by jcga (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4466054.html#post4466054)
Hi David,
Excellent ! I hope that you will be able to solve the anoying A/D hardware bug...
Best from France
Jean Claude

Unfortunately the ADC is at its end of life phase which means it is not recommended for new designs. Apparently ESS have new ADC's coming out soon and hopefully they will be pin compatible with the old one otherwise I will have to redesign the board again and I cannot currently find out whether the pin-outs are the same on the new devices :(

cheers

labjr 2nd October 2015 01:29 AM

I wonder how this will compare to the Mini DSP boxes? Better?

orangeart 2nd October 2015 05:59 AM

Much much better. I don't think there willl be anything currently on the market that will compete.

Stefan

jcga 2nd October 2015 06:11 AM

Quote:

Originally Posted by Tranquility Bass (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4470413.html#post4470413)
Unfortunately the ADC is at its end of life phase which means it is not recommended for new designs. Apparently ESS have new ADC's coming out soon and hopefully they will be pin compatible with the old one otherwise I will have to redesign the board again and I cannot currently find out whether the pin-outs are the same on the new devices :(

cheers

Hi David,
Thanks for the update. I'm afraid it will take at best months before we can see anything from them documented and really available. So I'm wondering what could be the alternative to you beside a re engineering of the main board with a split of the ADC block ?

Crumboo 3rd October 2015 08:11 AM

This device will defenitely solve it all. Can't wait! :nod:

orangeart 3rd October 2015 08:26 AM

Quote:

Originally Posted by Tranquility Bass (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4470413.html#post4470413)
Unfortunately the ADC is at its end of life phase which means it is not recommended for new designs. Apparently ESS have new ADC's coming out soon and hopefully they will be pin compatible with the old one otherwise I will have to redesign the board again and I cannot currently find out whether the pin-outs are the same on the new devices :(

cheers

That is a real bummer. I guess this will take a long while, which seems a shame as you seemed to be getting quite close. What are your and now? Maybe a modular ADC add-on at a later date?

Stefan

torgeirs 3rd October 2015 03:03 PM

I have maybe missed it, but is it a samplerate converter on the input of the DSP? Is it freeware in Audio Weaver?
Sample Rate Converter | DSP Concepts
It would be nice to only make one filter and not one for each input samplerate.
Regards Torgeir

Tranquility Bass 3rd October 2015 11:32 PM

Quote:

Originally Posted by torgeirs (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4471689.html#post4471689)
I have maybe missed it, but is it a samplerate converter on the input of the DSP? Is it freeware in Audio Weaver?
Sample Rate Converter | DSP Concepts
It would be nice to only make one filter and not one for each input samplerate.
Regards Torgeir

Not needed as the DSP has an inbuilt SRC and everything is referenced to a 192KHz sample rate ;)

cheers

Tranquility Bass 4th October 2015 12:02 AM

Quote:

Originally Posted by orangeart (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4471492.html#post4471492)
That is a real bummer. I guess this will take a long while, which seems a shame as you seemed to be getting quite close. What are your and now? Maybe a modular ADC add-on at a later date?

Stefan

I'm kind of hoping that whatever they come out with will be a drop-in replacement for the existing ADC but failing that there are some other options from other vendors that I could consider which also offer high performance.

cheers

labjr 4th October 2015 12:10 AM

Quote:

Originally Posted by orangeart (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4470515.html#post4470515)
Much much better. I don't think there willl be anything currently on the market that will compete.

Stefan

I became interested in the Linkwitz LX521 speaker system. Then they stopped making the ASP board and went to DSP, using a MiniDSP box. I feel the 96 kHz sample rate would be a compromise compared to the analog crossover. Analog can have it's own issues but digital not done properly, to me, is much worse. And having to resample 192khz PCM and DSD to 96khz doesn't seem like a great idea.

I had considered Metric Halo but was told their interface does not quite have the DSP power for a 192khz stereo 4-way crossover. I think they're supposed to have a new and improved box any day now.

This project may renew my interest in that project again.


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