Excellent - Just like everything dCS does
Well written, thoroughly thought out and regularly updated. This app is intuitive to use, full featured and includes everything needed to operate dCS’ networked products. It has what can be thought of as “two sides” operating simultaneously: a hardware control part and a music services part. All of the features of my dCS Vivaldi DAC and Upsampler are found in the first and everything you could want beautifully implemented in the second. For those who like to use Roon, both can be run simultaneously allowing Roon’s music control with dCS Mosaic’s hardware control. Roon is definitely not required but doing this is an option. In fact, this app includes Spotify, Deezer and USB interfaces as well as Podcasts which Roon does not. Of course, you can play downloaded files as well (MinimServer suggested). If only the rest of the world were like dCS …