Purpose of a DAC and Redbook Presentation


I have seen DACs on audiogon. What is their purpose? Who would benefit from buying one? What does the term "redbook presentation" mean?

Eagleman
eagleman6722
If you do not have a coax out on your cd player forget about a dac and get a new player. toslink sucks.
Eldartford
Wish it was like that.Some older top of the line Dac's are still holding strong.
yes there is a benefit but you also need a very good digital cable. The other option is to have your CDP internal DAC modified.