- iHeartRadio: Your favorite radio stations now available on the Play-Fi network. - Critical Listening Mode for pure high resolution music up to 24 bit / 96 kHz to any single Play-Fi speaker. Stream your music files or Tidal in all its high-res glory. - Re-Streaming on the Polk SB1+ soundbar. Connect a music source to the Line-In and stream that source to other Play-Fi speakers on the same network. - Amazon Seek: Track anywhere from any song in Prime Stations or Playlists.- Language translations.