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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)

orangeart 28th July 2015 07:07 AM

I can't count the amount of times I've checked back on this thread to see if it's ready yet, the wait is killing me!

Amnes 28th July 2015 12:06 PM

Quote:

Originally Posted by orangeart (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4404129.html#post4404129)
I can't count the amount of times I've checked back on this thread to see if it's ready yet, the wait is killing me!

The suspense is unberable - I second that.

Tranquility Bass 28th July 2015 01:13 PM

I am overseas at the moment but I have found some time to finish off some board designs that I brought with me on the laptop ;)

Before I left I got the Asynchronous Sample Rate converter going and feeding it from the Toslink output of my Creative Sound Blaster external sound card on my PC. Was going to post some pictures but I ran out of time.

cheers

diyaudnut 28th July 2015 05:20 PM

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-post4404345.html#post4404345)
I am overseas at the moment but I have found some time to finish off some board designs that I brought with me on the laptop ;)

Before I left I got the Asynchronous Sample Rate converter going and feeding it from the Toslink output of my Creative Sound Blaster external sound card on my PC. Was going to post some pictures but I ran out of time.

cheers

David,

Any better estimates of the timeline when the HW+SW product is ready for shipping out to buyers?

thanks
Joji

Tranquility Bass 29th July 2015 01:57 PM

Quote:

Originally Posted by jojip (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4404544.html#post4404544)
David,

Any better estimates of the timeline when the HW+SW product is ready for shipping out to buyers?

thanks
Joji

When I get back from overseas I will start work on the dsp firmware and PC interface software. I have some ideas for this but this will take some time to get right. The hardware will probably be finished before the software.

cheers

WTS 1st August 2015 09:19 PM

Hi,

Instead of reading all the latest pages I'll just ask(hope you don't mind). Will this unit have digital outputs (of some description) for each channel (or some pads where we can get the required signals)as I'd like to feed my already present R-2R dacs which are built into my 4 amps. Say yes, lol.

Thanks,

vicky 2nd August 2015 07:29 AM

can anyone give advice for a perfect book for programming DSPs and being a beginner is it good to work with ADSP-21065l ?

Tranquility Bass 2nd August 2015 01:33 PM

Quote:

Originally Posted by WTS (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4408476.html#post4408476)
Hi,

Instead of reading all the latest pages I'll just ask(hope you don't mind). Will this unit have digital outputs (of some description) for each channel (or some pads where we can get the required signals)as I'd like to feed my already present R-2R dacs which are built into my 4 amps. Say yes, lol.

Thanks,

Yes it's possible with another board revision without the onboard DAC's. Something to look at in the future if all goes well with the current board
although I am not keen on a DSP environment that adjusts filter coefficients on the fly every time the incoming sample rate changes. That could become really messy depending on the implementation of the dsp signal processing.

cheers

WTS 3rd August 2015 02:10 PM

Hi TB,

I hope the next revision isn't too far away, lol, as I'd love to try it out when I get my third set of amps built.

I'm not sure what you're saying in your second part of your answer. I guess I just assume(d) that most of these DSP FIR filters are adjustable on the fly for crossover point and filter steepness(db). What does that have to do with have digital outputs and no onboard dacs? Am I missing something here in the discussion?

I guess they don't really need these to be adjust on the fly.

Thanks and keep up the good work.

Tranquility Bass 4th August 2015 12:58 AM

Quote:

Originally Posted by WTS (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post4409903.html#post4409903)
Hi TB,

I hope the next revision isn't too far away, lol, as I'd love to try it out when I get my third set of amps built.

I'm not sure what you're saying in your second part of your answer. I guess I just assume(d) that most of these DSP FIR filters are adjustable on the fly for crossover point and filter steepness(db). What does that have to do with have digital outputs and no onboard dacs? Am I missing something here in the discussion?

I guess they don't really need these to be adjust on the fly.

Thanks and keep up the good work.

I assumed you were talking about the Soekris R-2R DAC which has its own re-clocker and expects to be fed with data in its own native sample rate and not a constant sample rate from a sample rate converter - although it will still work with the latter.

cheers


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