So does anyone have an idea for a clock solution yet? I was thinking about running two 4204's, two 4104's and using the wavefront OPTO boards to interface with a lightbridge. Mikkel said that his opto boards could support S/MUX (i think) so I want to run 8/8 i/o at 24/96. If i read the datasheets correctly, i/we can run 1 4204 as "master," utilizing the SCLK input to create the BCLK and LRCLK signals. (Those pins in master mode are outputs) We can use those outputs to sync the other adc running in slave mode. ( where those pins are inputs.) The same idea applies to the 4104's...i.e. 1 master, 1 slave. Or, can we use the BCLK/SCLK output from the master 4204 to time the 4104's as well. In any case i believe the opto parts utilize a BCLK input so we can time those as well. Someone suggested a clock on a daughterboard, and as i have no other option for clock generation, this will have to become a reality for me. The datasheet for the 4204/4104 states that SCLK be a multiple of Fs. (sample rate). Giving us dual rate sampling mode, at 96kHz; 256Fs= 24.576MHz for SCLK. So, any ideas?