Twitter’s idea is to recommend songs based on personal contacts as well as on what is popular among the 200 million Twitter audience.
The service’s music feature is still hidden from the public, but it appears to be a way to learn what music is becoming popular.
Two videos that show Syrian soldiers and rebels dancing and singing have provoked sharply different political reactions.
How social media made knowledge guardians obsolete.
YouTube, Facebook and Twitter have made it easier for South Korean pop music bands to reach audiences in the West, and fans are using the same social networks to proclaim their devotion.
A new version of the service would allow users to send their own voices in messages via e-mail.