|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
69.123.24.133
I have a few Marantz cd63 and cd67 players that are highly modded and sound great. But ive recently made the switch to a pc based system. Id like to use my Cd67 as a dac. Id have to get an I2s signal out of my PC which is the easy part, I could use a USB->i2s converter or possibly mod my Xfi to output I2S instead of Spdif. The hard part is to get my cd67 to accept a digital input. Im thinking I could possibly disconnect the i2s input that goes into the SAA7345 from the transport and wire in my i2s signal from the PC. In theory it seems like it should work, but in the real world I have no idea. What do you all think???
Follow Ups:
In theory, simple. In practice, not often. Why not just use an I2S DAC?
Well im a college student and money is tight, I dont really have the cash for a new dac right now. I already have the cd67 so it would only cost me $30 or so for the usb-> i2s converter. Also the cd67 is extensively modded and I really like the way it sounds. I would be using it strictly as a dac so I wouldt have to worry about switching between the transort and usb input, I was planning on disconnecting the transport and display if this is possible. What im most usure of is if the cd67 NPC sm5872 dac will actually work with an I2s input from the usb converter, will I still have to press play to get any sound, will I get error codes since the transport isnt connected??
"What im most usure of is if the cd67 NPC sm5872 dac will actually work with an I2s input from the usb converter," Dunno but I can check my chip files if I can find the time. Do you have the datasheet?"will I still have to press play to get any sound, will I get error codes since the transport isnt connected??" Do you have the schematic? That's where the answers are.
I know technically it should work, but as ive been learning that doesnt always mean it works in the real world:) The input for the i2s signal looks to be pin 8 LRCI(sample rate clock input), 9 BCKI(bit clock input),and 10 DI(serial data input). So if I take the i2s output from the usb-> i2s converter and connect to pins 8,9,10 of the dac, it should work? right??? Well i guess Ill have to try it and see. Worst thing that happenes is it doesnt work, I can always use the USB converter for something else. One of the inexpensive TDA1543 dac kits might work.
Frank, i2s was designed to work from board to board traveling very short distances, not from box to box. Some have implemented box-to-box, but I've read it is critical to keep the length to a few inches. I'm no expert, but I have been through this mental exercise myself, and I think the best way to accomplish your goal is to purchase a usb-i2s board (just the module without dac) from Doede at DDDac and install it into your CD player and run the i2s from the receiver chip on this board a very short distance to your dac chip. This module accepts a USB input, hence you'll have a USB Dac with no spdif. However you end up doing it you'll need to defeat power to your current receiver chip (either by switching both the power and signal...difficult...or just simply by using the cd player with the usb input only. My $0.02
This post is made possible by the generous support of people like you and our sponsors: