I2S output on Proceed CDD

Calimero · 8th August 2003, 11:46 AM

Has anybody modified (or has plans to modify) a Proceed CDD (or similar transport) to support the I2S-interface standard. The transport supports SPDIF and AES/EBU and I expect that the I2S interface wil improve the output of the Proceed DAC (or of cause other DAC), assumed it has the I2S interface.

Calimero · 12th August 2003, 08:57 AM

I performed some investigation by opening the CDD and on the internet, with the following results:
The Proceed CDD has a Philips CDM12-IND drive inside. There are 5-power regulators

, three 7805CT one 7809 and one 7808. They all use low priced caps and resistors (as I can see). I havent yet ‘found out which parts of the design each regulatore is linked to.
I also couldn’t trace the crystal frequency, also I know the digital output is buffered and re-clocked.
On the internet I found that the CDM12-IND drive is compatible with the Philips CD-PRO (http://www.daisy-laser.com/cdpro.htm), which supports I2S-output. So does this mean I can conclude the CDM12-IND also supports the I2S-standard, so yes I can’t find anything on the web about the pin-layout of the connectors on the CDM12 module or the CD-Pro module.

Besides the I2S-interface that I would like to incorporate in the CDD, I have the idea to improve the Power supplies, although I don’t yet know which one to start and what design to use. I do know I it should be clean (especially no high frequency noise).
Any suggestions/help

joke · 12th August 2003, 04:26 PM

Hi Calimero...
I have sime question for my CDM12.1 from steinmusic...Where to find I2S...
after some search on the web I found this page
http://www.geocities.com/koalavilla/audio_transport.htm
where they say that I2S is taken directli from SAA7310 ...
here is SAA7310 data sheet
http://members.xoom.virgilio.it/hi_fi/q7310.htm
from what I can see that I2S should be on pin 2,3,4 (DAAB,CLAB,WSAB / data,clock,word select ), but I am not shure...I'am not EE...

can someone please confurm this ,or am I wrong ?

Maybe yours CDM12 have sime IC on board and you can use this information ...

Regards Josip

8th August 2003, 11:46 AM	#1
Calimero Banned Join Date: Aug 2003 Location: A farm on the prairie (protcted from foxes)	I2S output on Proceed CDD Has anybody modified (or has plans to modify) a Proceed CDD (or similar transport) to support the I2S-interface standard. The transport supports SPDIF and AES/EBU and I expect that the I2S interface wil improve the output of the Proceed DAC (or of cause other DAC), assumed it has the I2S interface.

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12th August 2003, 08:57 AM	#2
Calimero Banned Join Date: Aug 2003 Location: A farm on the prairie (protcted from foxes)	I performed some investigation by opening the CDD and on the internet, with the following results: The Proceed CDD has a Philips CDM12-IND drive inside. There are 5-power regulators , three 7805CT one 7809 and one 7808. They all use low priced caps and resistors (as I can see). I havent yet ‘found out which parts of the design each regulatore is linked to. I also couldn’t trace the crystal frequency, also I know the digital output is buffered and re-clocked. On the internet I found that the CDM12-IND drive is compatible with the Philips CD-PRO (http://www.daisy-laser.com/cdpro.htm), which supports I2S-output. So does this mean I can conclude the CDM12-IND also supports the I2S-standard, so yes I can’t find anything on the web about the pin-layout of the connectors on the CDM12 module or the CD-Pro module. Besides the I2S-interface that I would like to incorporate in the CDD, I have the idea to improve the Power supplies, although I don’t yet know which one to start and what design to use. I do know I it should be clean (especially no high frequency noise). Any suggestions/help

12th August 2003, 04:26 PM	#3
joke diyAudio Member Join Date: Apr 2002 Location: Croatia	Hi Calimero... I have sime question for my CDM12.1 from steinmusic...Where to find I2S... after some search on the web I found this page http://www.geocities.com/koalavilla/audio_transport.htm where they say that I2S is taken directli from SAA7310 ... here is SAA7310 data sheet http://members.xoom.virgilio.it/hi_fi/q7310.htm from what I can see that I2S should be on pin 2,3,4 (DAAB,CLAB,WSAB / data,clock,word select ), but I am not shure...I'am not EE... can someone please confurm this ,or am I wrong ? Maybe yours CDM12 have sime IC on board and you can use this information ... Regards Josip

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