Punjab, Sept. 15 -- September's international release calendar is led by rock returns and one significant pop record: Miley Cyrus releases Bass Persuades before the end of the month, with new projects from Anthrax and Rage Against the Machine's Tom Morello.

Two eras in one month

Anthrax and Tom Morello releasing in the same window is a reminder of how durable that generation of American rock has been commercially. Both built audiences in the pre-streaming era and have kept them through a complete change in how music is distributed and paid for.

A Miley Cyrus album operates on entirely different mechanics - playlist placement, first-week streams, and a release strategy built around a single algorithmic moment rather than a touring cycle....