The service will cost $9.99 and include Beats 1, a new radio venture.

Apple is set to launch a music streaming service. Here's what you need to know.

The tech giant is entering a crowded field and grappling with evolving trends.

Jay Z has started a streaming music service called Tidal. Can its business model succeed?

How powerful is the Jay Z brand?

The industry takes in only half the revenue it did at its peak.

It's all but the default for online video, but that means no margins.

But how much will it change album rankings?

Streaming services need top artists to keep subscribers but don't pay them much.

Do they risk undermining their core, indie-leaning fan base?