Ugg10 thanks for the link. I2S Input options - Tone - Khadas Community
I read the thread, not as deep as I should, but it seems that there is not a clear recepie to daisy chain and sync. The answers by the manufacturer seem lacking and it seems that they have not released a second generation firmware requested by different forum members,. Maybe the next card will be better documented.
The LA-QXD1 High-fidelity DAC looks simply amazing but for a multichannel project like your. With so many outputs it can become pricy. Mu goal would be to build a 6 channel interfaces oand for that somenthing on like the Tone Board has a very attractive price performance.
In order to get the best signal out all the dac need to be in sync. But, Linkwitz blessed an eight channel interface for the lx 5.2.1 that was very similar to yours: a dsp with four digital stereo outputs with channel terminated in four discrete independent affordable dac ( sub $100). And if it was good enough for him... Linkwitz Lab LX521
Congrats on a great project.
I read the thread, not as deep as I should, but it seems that there is not a clear recepie to daisy chain and sync. The answers by the manufacturer seem lacking and it seems that they have not released a second generation firmware requested by different forum members,. Maybe the next card will be better documented.
The LA-QXD1 High-fidelity DAC looks simply amazing but for a multichannel project like your. With so many outputs it can become pricy. Mu goal would be to build a 6 channel interfaces oand for that somenthing on like the Tone Board has a very attractive price performance.
In order to get the best signal out all the dac need to be in sync. But, Linkwitz blessed an eight channel interface for the lx 5.2.1 that was very similar to yours: a dsp with four digital stereo outputs with channel terminated in four discrete independent affordable dac ( sub $100). And if it was good enough for him... Linkwitz Lab LX521
Congrats on a great project.
@Frabor, Thanks for the comment, much appreciated. The Linkwitz lab link was one of the inspirations for this build along with info from the Nao Note II RS site which also uses a minidsp in its open baffle design.
In terms of affordability this was pretty decent - especially as I used Amazon vouchers which I got for various birthday/Christmas presents, cashed in some Quidco vouchers for amazon vouchers and also managed to get the Khadas dacs at around £65-70 each in Black Friday and other deals. I think if you wanted to build this then £600 would be a good budget to start with including all of the switched etc. and £30 for a dead amp/dvd/cd as a box (probably less if you don't want the rotel one).
For info, it looks like Nord Acoustics (UK based amp builder using NCore/Hypex boards) is using the Khadas Dac as the basis for their solutions (Nord Easy-Dac).
Nord Easy-DAC ES9038 | nordacoustics
My other option for an 8 channel dac was a second hand Lucid 88192 which go in the UK for around £400. This may solve your clock issue and they get very good reviews on the PRO Audio sites.
http://www.symetrix.co/repository/88192_ug.pdf
US Ebay example - Lucid 88192 A/D D/A CONVERTER 8 CHANNEL | eBay
In terms of affordability this was pretty decent - especially as I used Amazon vouchers which I got for various birthday/Christmas presents, cashed in some Quidco vouchers for amazon vouchers and also managed to get the Khadas dacs at around £65-70 each in Black Friday and other deals. I think if you wanted to build this then £600 would be a good budget to start with including all of the switched etc. and £30 for a dead amp/dvd/cd as a box (probably less if you don't want the rotel one).
For info, it looks like Nord Acoustics (UK based amp builder using NCore/Hypex boards) is using the Khadas Dac as the basis for their solutions (Nord Easy-Dac).
Nord Easy-DAC ES9038 | nordacoustics
My other option for an 8 channel dac was a second hand Lucid 88192 which go in the UK for around £400. This may solve your clock issue and they get very good reviews on the PRO Audio sites.
http://www.symetrix.co/repository/88192_ug.pdf
US Ebay example - Lucid 88192 A/D D/A CONVERTER 8 CHANNEL | eBay
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Hello friends,
I just came to this thread while googling by "DIY crossover DSP".
Just for your reference, in April 2020, I started my multichannel multi-amplifier project with digital software crossover in PC.
You can find the (provisionally) completed system using three amplifiers together with active L and R sub-woofer Yamaha YST-SW1000 in this post. The system is actually stereo 5-way 10-channel multichannel multi-amplifier configuration.
With the provisionally completed system, I measured the actual frequency response at the listening position as shared here, and also in digital level within the PC, in Okto DAC8PRO's analog line output level, as well as in line output level from the three amplifiers, as shared here.
I just came to this thread while googling by "DIY crossover DSP".
Just for your reference, in April 2020, I started my multichannel multi-amplifier project with digital software crossover in PC.
You can find the (provisionally) completed system using three amplifiers together with active L and R sub-woofer Yamaha YST-SW1000 in this post. The system is actually stereo 5-way 10-channel multichannel multi-amplifier configuration.
With the provisionally completed system, I measured the actual frequency response at the listening position as shared here, and also in digital level within the PC, in Okto DAC8PRO's analog line output level, as well as in line output level from the three amplifiers, as shared here.
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And, I believe these major issues always associating with Multi-Channel, Multi-Amplifier Audio System;
- Digital I/O for software crossover within PC
- Delay, latency and synchronization issues
- Phase issues
- Master volume and gain issues
As you may well aware, these issues are somewhat interdependent with each other.
I have carefully and intensively investigated these issues throughout my multichannel multi-amplifier project, and implemented my best/better solutions in the provisionally completed system.
- Digital I/O for software crossover within PC
- Delay, latency and synchronization issues
- Phase issues
- Master volume and gain issues
As you may well aware, these issues are somewhat interdependent with each other.
I have carefully and intensively investigated these issues throughout my multichannel multi-amplifier project, and implemented my best/better solutions in the provisionally completed system.