...Thinking about it some more...the drift 'problem' is for the SE version.
With duly matched and thermally coupled FET's it shouldn't be a problem.
...then again, I haven't built it 😱
With duly matched and thermally coupled FET's it shouldn't be a problem.
...then again, I haven't built it 😱
Attachments
Hi,
I continue the circuit drawing but have one question to members.I very confused.
First i try to explain circuit. There are a switch circuit between USB and other inputs.When USB close it will connect directly to the PCM1704 side.When SPDIF/Optical input close, it will connect to buffer and bit delay circuit then goes to PCM1704 side.As i know there is no other choise for that.
Then i saw DDDAC notes during my research.They use delay data half clock cycle.My question ;
Do i have to use this half delay circuit or my circuit is enough ?
DDDAC 1794 NOS DAC - Non Oversampling DAC with PCM1794 - no digital filter - modular design DIY DAC for high resolution audio 192/24 192kHz 24bit
http://www.dddac.com/documents/dddac1794pbt_nos_ver51.pdf
Best Regards
I continue the circuit drawing but have one question to members.I very confused.
First i try to explain circuit. There are a switch circuit between USB and other inputs.When USB close it will connect directly to the PCM1704 side.When SPDIF/Optical input close, it will connect to buffer and bit delay circuit then goes to PCM1704 side.As i know there is no other choise for that.
Then i saw DDDAC notes during my research.They use delay data half clock cycle.My question ;
Do i have to use this half delay circuit or my circuit is enough ?
DDDAC 1794 NOS DAC - Non Oversampling DAC with PCM1794 - no digital filter - modular design DIY DAC for high resolution audio 192/24 192kHz 24bit
http://www.dddac.com/documents/dddac1794pbt_nos_ver51.pdf
Best Regards
Attachments
Hi,
Do you have any progress with the PCM1704 project?
If I use this china xmos usb
New XMOS XU208 USB To Coaxial DAC Digital Interface / I2S Support DSD DOP / HIFI audio/ option Upgrade to 0.1PPM TCXO|usb to coaxial|coaxial dachifi audio - AliExpress
do I need the right/left data alignment circuitry that is part of Pavouk's design?
Thank you.
Do you have any progress with the PCM1704 project?
If I use this china xmos usb
New XMOS XU208 USB To Coaxial DAC Digital Interface / I2S Support DSD DOP / HIFI audio/ option Upgrade to 0.1PPM TCXO|usb to coaxial|coaxial dachifi audio - AliExpress
do I need the right/left data alignment circuitry that is part of Pavouk's design?
Thank you.
No real progress, still remodelling my kitchen...
That board looks like it will need some external circuitry yes.
Patrick shows the use of the JL Sound board a few posts up, so that's a proven board.
...and it's the one I have laying around somewhere..
That board looks like it will need some external circuitry yes.
Patrick shows the use of the JL Sound board a few posts up, so that's a proven board.
...and it's the one I have laying around somewhere..
Do you have a finished PCM1704 dac board or it is in progress?
Actually I know the JL Sound board it is great but if I want to use better oscillators like CRYSTEK CCHD-957 I have to buy additional board from JL Sound for them.
In this china board the oscillators can be replaced easily.
Actually I know the JL Sound board it is great but if I want to use better oscillators like CRYSTEK CCHD-957 I have to buy additional board from JL Sound for them.
In this china board the oscillators can be replaced easily.
No, sorry - no PCB.
If you can get any support from China, go for it...
My experience with the clone-makers is - You are on your own.
I'm thinking, get the DAC built and worry 'bout clocks later....
....it's a can of worms that subject.
If you can get any support from China, go for it...
My experience with the clone-makers is - You are on your own.
I'm thinking, get the DAC built and worry 'bout clocks later....
....it's a can of worms that subject.
I found this board Lusya NOS DAC/I2S format NOS decoder shifter board and I2S data conversion right aligned format DC 5V T0855|Amplifier| - AliExpress which is for XMOS board. So if I want to use china usb xmos board with NOS pcm1704 dacs I must use NOS DAC/I2S format NOS decoder shifter board.