If you mean you are using a standard analog IC to make the digital connection between your CD transport and your DAC, yes, a digital cable will make an improvement. Digital cables, among other things, are designed with 75ohm impedance, which is meant for compatibility with the digital input/output characteristics of the components.
This might be a stupid question,,but
I recently upgraded from a DVD player to a transport,DIP,DAC combo,which sounds better,but i am using analog ICs,will going to good digital cables improve the sound?