🚀 go-pugleaf

Kit-pui Wong wrote in message <768io3$ogr$1@justice.csc.cuhk.edu.hk>...
>Hello,
>
>I recently bought a Denon DA-500 DAC from the 2nd hand market
>and want to do some "experiments" with it.
>However, I have no budget for an (expensive) CD transport.
>
>Is there any expert here having experience to "extract" the
>digital audio signal from cheap CD players/or CD-ROM drives ?
>I know a little bit electronics. Where can I get the resources,
>such as "typical" circuits, chips references, etc.
>


I've never done this, but depending on the player, it might be doable. What
you need is to find a signal line(s) in the player that has a SP/DIF or I2S
signal. There are chips that will handle that data and create a good SP/DIF or
TOSLink output from it.

So, having a service manual for the player that has a schematic in it would be
a good place to start. YOu can use it to find out where to find the internal
power and signals that you need for your project. Denon probably has a
national parts warehouse where you can order these things.

Even lacking that, if the Denon has standard DAC chips in it, then you can
find a lot of what you need from data sheets for those chips. For example, my
Denon DAC has Burr-Brown 1702 DAC's in it. If you go to the B-B web site you
can download PDF files that are data sheets for those DAC's, and find out what
pins have the apropriate digital signals on them.

For DAC chips and digital line drivers, the leading producers are Crystal
Semiconductor. Burr-Brown, AKM, and Analog Devices. They all have pretty
complete web sites you can find from a regular search engine using the company
name. AFAIK, they all have pretty complete data sheets and application notes.
You will probably be able to find application notes that show how to
interconnect their chips to do many digital audio applications.