A little background:
These were good CD players in their day intended for DJ use so have features relevant to this i.e. cueing and ability to pitch bend etc
One issue though that has always bugged me was the sound quality from the DAC (PCM1700U-J) and as they only have analogue outputs you get the idea.
Having had a look at the schematics and data sheets of the DSP used (Sony CXD2500BQ) I believe it should be fairly easy to modify these to have a digital out.
Question is can I take the output of pin 60 off the CDX2500BQ directly or does this need to be buffered before going to a digi output RCA socket?
Of course at the moment pin 59 is going to ground which needs to be cut and a switch needs to be installed to toggle between on and off i.e. between GND and I believe anything above 0.7Vdd according to the data sheet.
Thing is it doesn't state a max, is 5v acceptable?
Thanks
These were good CD players in their day intended for DJ use so have features relevant to this i.e. cueing and ability to pitch bend etc
One issue though that has always bugged me was the sound quality from the DAC (PCM1700U-J) and as they only have analogue outputs you get the idea.
Having had a look at the schematics and data sheets of the DSP used (Sony CXD2500BQ) I believe it should be fairly easy to modify these to have a digital out.
Question is can I take the output of pin 60 off the CDX2500BQ directly or does this need to be buffered before going to a digi output RCA socket?
Of course at the moment pin 59 is going to ground which needs to be cut and a switch needs to be installed to toggle between on and off i.e. between GND and I believe anything above 0.7Vdd according to the data sheet.
Thing is it doesn't state a max, is 5v acceptable?
Thanks
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Ok found the relevant info required in a old electronics magazine and looking through service manuals of players which use this chip to output digital data.
If any one else is interested look at page 61 of this PDF which also gives you a circuit to make
https://worldradiohistory.com/UK/Elektor/90s/Elektor-1993-09.pdf
If any one else is interested look at page 61 of this PDF which also gives you a circuit to make
https://worldradiohistory.com/UK/Elektor/90s/Elektor-1993-09.pdf