The music stopped. The bass note returned, louder.
Later updates of Tetris Effect (v1.2.x and beyond) implemented more aggressive DRM. Many players on low-end PCs reported that v1.0.5.2 ran smoother because it was pre-Denuvo (or had a less intrusive version). The Codex crack removed the periodic DRM checks that caused 1-second stutters every 10 minutes on aging hardware. tetris effect update v1 0 5 2codex
As this update was specifically for the Codex version, the following changes were made: The music stopped