No, It's cool Del. In basic terms, Yes, Converts digital to analog. Some digital recordings (Not all), Can have that harsh, Overdriven sound. Fatiguing. So you get a box, Plug in your optical cable in, Your favorite rca's out, Bam, The crappy signal just got converted to something smoother. Most good CD players have a good built in dac. The outboard Dac would be for anything, Including PC audio. Dac's with tubes can " Mellow" out a lot of harshness. There's so much more, But you get my drift.