Most of the available SYNC entertainment systems start to play as soon as you load media. With indexed devices, such as USB media players, SYNC first uploads the index, so it can take a few minutes for play to begin.
If you're already listening to an entertainment system, SYNC assumes your voice command is for that mode. To switch to a different entertainment system, you must name it to switch modes. For example, if Bluetooth Audio is streaming, and you want your USB media player, say "USB," then give USB commands.
"Track" refers to audio track and is usually the same as "song."
With some 2015 model year vehicles,* you can use streamlined voice commands. This means that the command words "Song," "Playlist," "Artist," "Album," and "Genre" are optional. For example, you can now simply say, "Play Penny Lane by The Beatles."
* With Ford 2015 model year, SYNC-equipped Mustang, F-150, Edge and Focus.