DCX2496 mod for Digital OUT x 3

Status
Not open for further replies.
Jump to Latest
#23
the MCLK signal is the main clock signal, usually 128, 256, 384 or 512 times the bit clock (SCLK) frequency.
most systems use 256x or 384x
as for 96kHz, 512x is often too high, above 20MHz ( 96kHz x 512 = 49MHz) which is too high for a lot of chips

example - my cd player MCLK is 44.1 kHz(SCLK) * 384 = 16.934 MHz

and for the DCX, I use LL MH MH as this reduces cross-talk in the mid and high frequencies
edit -
that was the old way, I now use a 10-way active system with two DCX's, the AES is parallel to both units and each is set to left or right

SUB-LOW-MID-HIGH-SUPER

took a while to configure, but the results are well worth it.
 
#24
Board and schematic

Did anyone create a PCB for Tanto's circuit? Can someone draw the basic schematic out for me including parts list?

This type of circuit reminds me alot about the XMRadio digital interface boards. Many of the XM Radio's were modified to use digital output because the builtin DAC was so bad. Hookup involved either soldering or clipping about 6 wires. Could something like this

http://www.xmfanstore.com/showproduct.php?id=digital

be mated to the AKM4393 DAC?
 
#25
Hi all,

I've found the MCLK pin on the DCX2496's AK4393 DACs.
It's pin #3, look here :

An externally hosted image should be here but it was not working when we last tested it.


Then, may be this SPDIF setup could be hooked to the DAC's pins 6 (SDATA) ,5 (SCLK) , 7 (LRCK) and 3 (MCLK) to finally get this elusive and awaited 3 digital outs modification working ?


What do you think ?

Have fun

Thierry




.
 
#26
Thmartin said:

Then, may be this SPDIF setup could be hooked to the DAC's pins 6 (SDATA) ,5 (SCLK) , 7 (LRCK) and 3 (MCLK) to finally get this elusive and awaited 3 digital outs modification working ?
Click to expand...


It will need a change to the DIT4096 circuit before it will work. Between the datasheets for the AK4393 and the DIT4096 you should be able to work it out.
 
#27
I just spoke to the Behringer guy...
The new DCX2496 should be available in Oz around March or so....
I'll get one and see how it goes.

In case anyone didn't know, they had to re-design the circuit due to some IC no longer available.....
 
#30
Something here does not add up. The OP's circuit uses the CS8404 in PRO mode with TRNPT pulled low. In this mode the datasheet explicitly states that MCK must be 128Fs. The AK4393 has a minimum master clock of 256Fs in normal mode. Yet the OP's circuit has the AK4393 and the CS8404 sharing the same master clock.
 
#33
Tanto said:
Hi all
I made SPDIF transmitter board for DCX2496.
It is easy and you can get 3Way digital X-over device at very cheep price.

(1) The signal you need
from AK4393, get these signal with very slender cable, solder with microscope or something.
Pin 3:MCLK?APin 5:BICK?APin 7:LRCK
These signals are common for all AK4393.

Pin 6:SDATA , on the side of AK4393, you can find 10ohm R,
you can get 3 SDATAs from this register's solder easily.

(2)CS8404 configure
PRO=Low, TRNP=Low, M2M1M0=100, I2S mode.
Pullup RST with 10kohm.

(3)CS8404 connection
?@MCLK->MCK, BICK->SCK, LRCK->FSYNC, SDATA->SDATA

(4)SPDIF output is done by TOTX173

(5)5V power is made by 7505, on each CS8404, 9V is supplied from Pin 1 of 7805 on the main PCB. GND is supplied from Capaciter's solder. (maybe direct from power module is better)

Then now you can get 3 SPDIF signal, for DCX2496's ch12, 34, 56.
Do not forget to make DCX2496's configuration to LL-MM-HH.?@

Now I'm using this for connection to 3 units Panasonic SA-XR50(maybe same as SA-XR45 or so).

Tanto
Click to expand...

Please email me if you are still around:

Audioexcels@yahoo.com

Thanks!
 
Status
Not open for further replies.
Top Bottom