Get I2S or EIAJ from a Sony CDR - diyAudio
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Old 13th December 2009, 03:45 PM   #1
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Default Get I2S or EIAJ from a Sony CDR

hello!

Is it possible to get a I2S or EIAJ from this cd-r?

SONY crx230ee-- and the internal pic.

Thanks a lot!
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Old 13th December 2009, 03:50 PM   #2
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If it has an analogue output look for the dac, possibly an 8 pin device like a TDA1311 or TDA1387. You'll find what you want there.
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Old 13th December 2009, 10:01 PM   #3
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Well, i looked but audio analog out comes from the big square chip:
MT1585E
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Old 14th December 2009, 01:05 AM   #4
wwenze is offline wwenze  Singapore
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AFAIK the I2S standard is not found on CD drives, any audio out analogue or digital (SPDIF) is handled by a general-purpose IC, in this picture the big M chip. Saves costs.
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Old 14th December 2009, 09:33 AM   #5
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thanks... I found the link between audio out-analog and 2 pins from the big chip.
So I guess it's no chance then!
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Old 14th December 2009, 02:56 PM   #6
glt is offline glt  United States
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Older CDRs do have a separate DAC and you can tap the "audio interface lines". They are the same as I2S, but could be left justified, or right justified or 16 bits. I have pulled these lines from two different CDRs into an ASRC (so I didn't need the clock). But if you want straight connection to a DAC, you will have to find the clock (MCK) line. Then you will have to program/set the DAC accordingly. So look around for old PCs and pull the CDRs. The older the better.

I've done some measurements on I2S lines in my blog...
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Old 2nd January 2010, 08:43 PM   #7
fzaad is offline fzaad  Europe
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hi glt what kind of measurements you have done with i2c. I'm just wondering since we are talking digital interface. If aint bit perfect then you fail.
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