Riff: Promote music efficiently on Instagram, Twitter, and Facebook

Have you ever been listening to a song and heard a perfect line, aperfect melody, a perfect riff? Something you just had to sharewith your friends?With Riff, you can share your favorite part of any song withyour friends in a music message—a "riff". Even if your friendsdon't have Riff, that's fine—we'll just text them a link to openyour riff on the phone browser.