AKG BAP1000 Digital IO

[rfbrw]

Seems that way.

 

[rfbrw]

Nearly there. Can you put L/R on scope ch1 and FSYNC on ch 2 with L/R clock as trigger and do the same with L/R clock and SDATA .

 

[huelskemper]

You are so kind!

Please find the requested pics. I have done a shot with overlapping and separated traces.

Thank you very much

1) Ch1: L/R, Ch2: FSYNC seperated
2) Ch1: L/R, Ch2: FSYNC overlapping

3) Ch1: L/R, Ch2: SDATA seperated
2) Ch1: L/R, Ch2: SDATA overlapping

 

[rfbrw]

In order to avoid programming, I am going to borrow from Marantz and Teac. The chips will be WM8804/SRC4192 or DIR9001/SRC4192.

 

[huelskemper]

would it make life easier if I would restrict it to 16bit/44.1kHz material (not a big constraint for me).

Thank you

 

[rfbrw]

It won't make much difference. How are you with surface mount tech ?

 

[huelskemper]

Hi,
I have equipment to do SOIC kind of packages at home and access to more professional gear at work.

Very curious!

 

[rfbrw]

What are your plans as regards switching ? Or is the spdif replacing the ADC ?

 

[huelskemper]

That's a very good question...

it would be perfect if I could simply loop the existing digital signal paths through the new circuit and switch to SPDIF-in when on this input signal is available.

Would be also great if I could get the BAP1000 back to original state if necessary...this might have even the highest priority...

Sorry for keeping you busy on that

Thank you!

 

[rfbrw]

No problem, it is all good fun.

 

[rfbrw]

Side tracked by work, back on the case asap.

 

[rfbrw]

Thank you!

I found on Ebay DIR modules called DIR9001 DIR9001 module coaxial / fiber receiving I2S output 24bit 96khz | eBay that support 16bit I2S mode (16bit right-justified) or 24bit (I2S). Next to the output 256Fs is printed on the board. Not sure if one of these modes match.

Good idea. This board simplifies things.

 

[huelskemper]

Would be great. Should I order it?...shipping time is rather long and price low.

Don't worry if you are busy with other things. I managed to live for years with this status.

Thank you very much!

 

[rfbrw]

Might as well. It is a good price and I may be able to come up with a pcb for the ASRC in the meantime.

 

[huelskemper]

Hi,

the DIR9001 board arrived. Looks pretty good.
Clock is set to 256*fs but I checked the DIR9001 data sheet: just change the configurations on two pins to get 384*fs.

Thanks!
Michael

 

[rfbrw]

Just waiting for a SMT to DIL adaptor to turn up. Should be here in a day or two.

 

[rfbrw]

In addition to the DIR9001 board you will also need one of these

 

[huelskemper]

Ordered!
Delivery will take until April.

Thank you very much!

Best regards

 

[rfbrw]

You will also need 1 each of 1k0 and 16k2 in 0805 smd.

 

[huelskemper]

should be no problem.
Do I have to modify the DIR9001 board to 384x?