Hi,
I've been thinking on building a multichannel dac for my home theatre.
The source would be a PC, and it would decode the Dolby signals, and the dac would convert the lpcm to analogue signal.
(For total overkill, one dac chip per channel).
The question is: how to process the lpcm signal?
I've been thinking on building a multichannel dac for my home theatre.
The source would be a PC, and it would decode the Dolby signals, and the dac would convert the lpcm to analogue signal.
(For total overkill, one dac chip per channel).
The question is: how to process the lpcm signal?
How do you want to process the LPCM signal? If you mean for things like digital crossovers and or room correction, it can all be done in the PC. Also, you might might like the sound better if all digital audio was converted to, say, DSD256 before being sent to the dac or dacs.
One dac per channel is not really necessary nor desirable IMHO. What would you be trying to accomplish by doing that?
One dac per channel is not really necessary nor desirable IMHO. What would you be trying to accomplish by doing that?
1) there are some chips, which converts the lpcm to I2S.
2) I will build a dual mono stereo dac, and order the pcbs from jlcpcb. So, considering the minimum order quantity, and my laziness to design stereo dac boards, I will use single dac per channel
2) I will build a dual mono stereo dac, and order the pcbs from jlcpcb. So, considering the minimum order quantity, and my laziness to design stereo dac boards, I will use single dac per channel
LPCM is often synonymous with PCM, which is is typically almost the same as I2S. When one gets down to asking questions at that level its necessary to look at the exact protocols that are to be used. Most modern dacs tend to support LJ and RJ PCM, I2S, DoP, and or DSD, all on the same 3-wire bus. So, one might have to look at the specific version (or implementation) of LPCM you want to use along with that of whatever device you want to interface it to.
My problem is this: how can I get all channels from the hdmi (arc)?
There are some alliexpress boards however they only support stereo.
There is the adv7326 chip, which could do the trick, however I could not found a board with it, so I would have to design it myself ( and I do not want that)
There are some alliexpress boards however they only support stereo.
There is the adv7326 chip, which could do the trick, however I could not found a board with it, so I would have to design it myself ( and I do not want that)
It looks like owners of hi-res and or multi channel digital audio content don't want it copied or used other than as licensed by them. Thus you may have difficulty finding what you want. If it were me, I might take a look at an AV receiver, say, maybe an older one with a service manual available and see if its dac or dacs could be replaced by my newer dac or dacs. Depending on specifics it might not be much different than repairing a broken AV receiver.