With the variety of digital audio sources now available—from personal collections to disruptive, high-end, Internet music-streaming services—ensuring easy access to everything on a personal audio system can be a challenge. Data Conversion Systems (dCS) has stepped in to resolve this problem with the new dCS Rossini line, which offers an array of features without compromising audio purity.

The Rossini DAC (about $23,340) includes many digital audio inputs for connecting to CD players, computers, or other Uni…