PC input on my old 4xtda1541

[Dyolf]

Originally Posted by rfbrw

Then you would have to extensively modify the circuitry that precedes the 4 TDA1541's or add the logic needed to reformat the output of the DIR9001 to match that of the SAA7220.

The original layout from cambridge is 16xOS and i loved the sound, so I guess I'll stick to that then. You guys already recommended 2 different S/Pdif boards.
I've checked on eBay, and there seem to be loads of options. Is it the DIR9001 + TDA1543 types i shall go for, with no other considerations?
Steen

[rfbrw]

The only other thing to consider is MCLK signal. Originally the SAA7220 and the other upstream chips would have been driven by a 11M2896Hz crystal attached to the SAA7220. For correct operation you would need to use the MCLK recovered from the SPDIF datastream. Looking at the picture of the mini board, it looks like the pins that determine the frequency of the MCLK are tied together. They may be high or low, something that does not matter with the TDA1543 as it does not require MCLK but either way it means the wrong MCLK frequency for the SAA7220. The board would have to be modified to correct this.