DCX2496 USB Input

Will · 12th November 2010, 06:26 AM

I'm currently using a M2Tech USB interface to my DCX using BNC connections.

Because I have not upgraded the input chip of the DCX (a CS8420) and instead of investing in a CS8416 module, I thought of using this item below:

Native 24bit 96k USB to Spdif I2S Converter Module DAC - eBay (item 290496891548 end time Dec-05-10 20:14:09 PST)

It would simplify a lot of digital conversion process which is a good thing as I'm able to bypass SPDIF completely - although the thing that I lost will be a 24/192 capability which the M2Tech is able to perform if I used a CS8416.

My question is, when I completely remove the CS8420, which are the I2S pins that I hook up this new USB module to ? I've attached my guess. Pls feedback.

CS8420 I2S replacement.JPG

davecandialex · 15th November 2010, 10:53 PM

I don't know much about your M-tech board, but I believe the ASRC chip
in the DCX operates in slave mode. That means that the Bit clock and
LRclk come from the DCX digital board to the CS8420. I would imagine the
board you have doesn't work that way.

Pano · 15th November 2010, 11:34 PM

There is also the MiniDSP board that does the same thing for a bit less money.
MiniDSP - USB Audio Streaming

I would double check the pinout of the CS8420, because it does not look the same as the DCX schematic at 1st glance.

jazzbear · 01:46 PM

Hello Will!
Have you solved the I2S input with Teralink X2, I have the same problem
Experts Help!

Thanks

zigzagflux · 9th April 2012, 03:24 PM

This is the best I could come up with, but not having anyone confirm the sanity, I wasn't ready to attack my DCX:

XMOS-based Asynchronous USB to I2S interface

I suspect regardless of what I2S device you use this would apply. It also assumes the CS8420 is running in slave mode. With this method you can input any number of frequencies and bits, avoiding SPDIF entirely.

jazzbear · 10th April 2012, 09:10 PM

Thank you for your help zigzagflux
I'm crazy enough to attack my DCX.
The Teralink X2 works with its Adaptive Data Handling
I think it will be fun
I'll be back

zigzagflux · 12th April 2012, 01:05 PM

Well I hope it turns out for you. Please get back with your results; if you have success, I plan to mod mine.

Keep in mind you will continue to be subject to the clock on the DCX board. Depending on who you ask, this clock is either sufficient or pathetic.

12th November 2010, 06:26 AM	#1
Will diyAudio Member Join Date: Sep 2001 Location: Kuala Lumpur	DCX2496 USB Input I'm currently using a M2Tech USB interface to my DCX using BNC connections. Because I have not upgraded the input chip of the DCX (a CS8420) and instead of investing in a CS8416 module, I thought of using this item below: Native 24bit 96k USB to Spdif I2S Converter Module DAC - eBay (item 290496891548 end time Dec-05-10 20:14:09 PST) It would simplify a lot of digital conversion process which is a good thing as I'm able to bypass SPDIF completely - although the thing that I lost will be a 24/192 capability which the M2Tech is able to perform if I used a CS8416. My question is, when I completely remove the CS8420, which are the I2S pins that I hook up this new USB module to ? I've attached my guess. Pls feedback. CS8420 I2S replacement.JPG __________________ regards, Will

15th November 2010, 10:53 PM	#2
davecandialex diyAudio Member Join Date: Feb 2008 Location: Beverly MA	DCX input I don't know much about your M-tech board, but I believe the ASRC chip in the DCX operates in slave mode. That means that the Bit clock and LRclk come from the DCX digital board to the CS8420. I would imagine the board you have doesn't work that way.

15th November 2010, 11:34 PM	#3
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	There is also the MiniDSP board that does the same thing for a bit less money. MiniDSP - USB Audio Streaming I would double check the pinout of the CS8420, because it does not look the same as the DCX schematic at 1st glance. __________________ Take the Speaker Voltage Test!

9th April 2012, 01:38 PM	#4
jazzbear diyAudio Member Join Date: May 2006	Hello Will! Have you solved the I2S input with Teralink X2, I have the same problem Experts Help! Thanks __________________ Neno Last edited by jazzbear; 9th April 2012 at 01:46 PM.

10th April 2012, 09:10 PM	#6
jazzbear diyAudio Member Join Date: May 2006	Thank you for your help zigzagflux I'm crazy enough to attack my DCX. The Teralink X2 works with its Adaptive Data Handling I think it will be fun I'll be back __________________ Neno


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9th April 2012, 03:24 PM	#5
zigzagflux diyAudio Member Join Date: Oct 2006	This is the best I could come up with, but not having anyone confirm the sanity, I wasn't ready to attack my DCX: XMOS-based Asynchronous USB to I2S interface I suspect regardless of what I2S device you use this would apply. It also assumes the CS8420 is running in slave mode. With this method you can input any number of frequencies and bits, avoiding SPDIF entirely.

12th April 2012, 01:05 PM	#7
zigzagflux diyAudio Member Join Date: Oct 2006	Well I hope it turns out for you. Please get back with your results; if you have success, I plan to mod mine. Keep in mind you will continue to be subject to the clock on the DCX board. Depending on who you ask, this clock is either sufficient or pathetic.

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