安装包图标

Rubber Ring

A looper for practicing song parts.
新版本 0.14
• New Library screen: sort your tracks, pull the list down to search, and star favourites to keep them at the top. Home now lists your recent tracks.
• Fixed a problem with slowing down long songs: playback could stutter and the app could crash. The slowed-down song is now also ready twice as fast.
• Tracks too long for the phone's memory are refused with a clear message.
Rubber Ring is a tool for practicing song parts. Pick an audio file, mark a start/stop region on its waveform, and play it back in a seamless, gapless loop. It auto-detects tempo and beats to snap the loop markers to a beat grid, with full manual override.

Early-stage release — expect rough edges. Feedback and bug reports welcome via Issues.

Features:

* Import-and-own library — picked files are copied into app-private storage, so loops never break when the original is moved, renamed, or deleted.
* Library with search, sorting and stars — pull the list down to find a track by name, sort by recently used, name, length or date added, and star favourites to keep them at the top.
* Waveform region selection with gapless looping — drag start/stop handles to mark a section; the loop boundary wraps with zero audible gap or click.
* Automatic, hand-editable beat grid — a dependency-free estimator finds BPM and a downbeat, and handles snap to the beat grid.
* Chord detection with a hand-editable chord lane — chords are labelled over the waveform; tap to relabel, split or merge. Detection is tuned to the author's own material, so the lane is there to correct by hand, and can be turned off.
* Per-track audio normalization — boost a track that was mixed too quietly, by peak or by loudness; your original file is never altered.
* Adjustable playback speed — slow a tricky passage down (or speed it up) without changing pitch.
* Count-in — long-press Play to start after a metronome counts you in at the track's tempo.
* Saved loops and practice arrangements — capture named sections per track and chain them into a sequence, each repeated as many times as you set.
* Export a saved loop as a WAV file, at the current speed, for a DAW or to share.
* Backup & restore — export your whole library to a file and restore it after a reinstall.
* English and German, with optional German note names (H and B) for chords.
* Opens audio shared from other apps.

No ads, no trackers, no network access.

版本

尽管下面提供了 APK 安装包的下载选项,但你应该注意,以这种方式安装将不会收到更新通知,这是一种不太安全的下载方式。 我们建议你安装使用 F-Droid 客户端。

下载 F-Droid
  • 版本 0.14 (15) 推荐 更新于 2026-10-22

    arm64-v8a armeabi-v7a x86 x86_64

    该版本需要 Android 8.0 及以上版本。

    此包由原始开发者构建并签名,并保证对应于此源代码 tarball。

    权限
    • de.singular.looper.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下载 APK 13 MiB PGP 签名 | 构建日志

  • 新版本 0.13
    • Loop chips now toggle: tap the highlighted chip to switch its loop off and return to the whole track. Tap it again to bring the loop back.
    • Slowed-down or sped-up playback: fixed a crash when switching loops, whole songs now stretch in seconds instead of minutes, and changes no longer jump back to the loop start.
  • 版本 0.13 (14) - 更新于 2026-10-15

    arm64-v8a armeabi-v7a x86 x86_64

    该版本需要 Android 8.0 及以上版本。

    此包由原始开发者构建并签名,并保证对应于此源代码 tarball。

    权限
    • de.singular.looper.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下载 APK 13 MiB PGP 签名 | 构建日志

  • 新版本 0.12
    • Export a saved loop as a WAV file: long-press its chip and choose Export as WAV. The file is the loop as you hear it, at the current speed and cut exactly at its edges.
    • Loops played slower or faster than 1× now come round exactly on time instead of a few milliseconds early, so they no longer stumble at the loop point.
  • 版本 0.12 (13) - 更新于 2026-10-02

    arm64-v8a armeabi-v7a x86 x86_64

    该版本需要 Android 8.0 及以上版本。

    此包由原始开发者构建并签名,并保证对应于此源代码 tarball。

    权限
    • de.singular.looper.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下载 APK 13 MiB PGP 签名 | 构建日志