The iPhone 4S rocks at playing music, but Siri lets you use your voice instead of your fingers to play a track or playlist, shuffle your songs, pause and jump between songs, and so on.
Playing a particular song
All you need to do is ask Siri (nicely) to play an individual song or album.
Press and hold the Home button.
The short chime means Siri is listening for your command.
Tell Siri what you’d like to listen to.
Siri confirms your request, and yes, you do need the song on your iPhone 4S to listen to it!)
If your friends, family members, or colleagues don't have an iPhone 4S (therefore no Siri), they might still be able to use their voice to control their music. Aptly named Voice Control, this Apple feature is bundled in the iPhone 4S, Phone 4, iPhone 3GS, and iPod touch (3rd and 4th generation).
Siri also lets you ask to play a particular album, if you happen to have it on your iPhone 4S. For example, you can say play Adele's album 21 or Best of the Beast, by Iron Maiden. Just like you'd ask to play a song, you can play an album from a particular artist (or a compilation album with various artists).
Launching a playlist using Siri
Okay, so you now know how to play a song or music from an artist, but what if you want to hear one of your playlists? Ask and you shall receive. Here's how to pull this particular trick off:
Press and hold the Home button.
Begin talking after the familiar Siri chime, telling Siri to play a playlist, by name.
For example, say, "Play Road Trip playlist," or "Play playlist called Dance Tunes."
Siri confirms your selection request and launches the first song on the playlist.
You don’t have to give Siri the complete name of the playlist. A word or two is enough, and Siri will do the rest.
Shuffling your music
Not sure what you feel like listening to? Tell Siri you want to shuffle up songs to hear them in a random order.
Okay, so this might not fare well to those enjoying a linear classical music symphony like Beethoven's 5th or maybe a concept album by Genesis, but for those who don't care what order the music plays in, you can shuffle it up by asking Siri to do it for you.
In fact, there are different ways to ask Siri to shuffle music. The following are a few things to consider:
To ask Siri to shuffle your entire music collection: Say, "Shuffle my music."
To ask Siri to shuffle music from one album: Say, "Shuffle the album Viva la Vida."
To ask Siri to shuffle music from one artist: Say, "Shuffle Coldplay."
To ask Siri to shuffle music from one playlist: Say, "Shuffle Mellow Out playlist."
To ask Siri to shuffle music from a particular genre: Say "Shuffle pop."
You get the idea!