The streaming service announces "Moving Sounds," lower prices for pro users, beautiful new tools for select Pro Partners, and something even rarer among tech startups: a new way to make money. To really appreciate SoundCloud's vision for the future of listening, you have to see it. The streaming service for music and sound--the one with the waveform and interactive comments you've seen embedded everywhere--launches its overhauled Pro Partner program today and drops the price for its premium offerings, which are simplified to two tiers instead of five (Pro is $37.70 a year; Pro Unlimited is $37.70).