0.3

Rubber Ring 0.3

This release is all about practicing harder passages — play them slower, and loop them in sequence.

Highlights

• Pitch-preserving speed — slow a tricky passage down to 0.5× (or push it to 1.5×) while it stays in tune. Uses a hand-rolled WSOLA time-stretch, so there are no new dependencies and nothing proprietary.
• Practice arrangements — chain your saved loops into an ordered routine (e.g. Intro → Theme ×4 → Chorus → Theme ×2), optionally looping the whole set, to drill A–B–A transitions hands-free.

Also in this release

• A screen-kept-on indicator in the app bar.
• The speed control is now a compact link in the beat-control row.
• Reworked Arrange popup: an "enabled" toggle beside the title, a switch for "Repeat whole sequence", and clearer step rows.
• While an arrangement is enabled, the single-loop and grid controls dim (they don't affect arrangement playback) and explain why if tapped.
• New "steppers" icon for the Arrange button.

Notes

• No new permissions; still zero network access, GPL-3.0.
• The full history is in CHANGELOG.md.
• The attached APK is the reproducible-build reference, signed with the project's release key.