austinried ef0c34d973 library: keep artist queries index-driven on large libraries
Rewrite artist queue membership as a UNION of indexed song-id branches
instead of an OR that scanned every song, and recompute artist play data from
an explicit credited-album set instead of scanning all albums per artist.

Run PRAGMA optimize after syncing songs and before play aggregation, and
derive downloaded artist lists and filters from downloads rather than all
songs. Count downloaded albums per artist with artist-first branches.

Extend the query timing harness with the artist playback, download and status
queries plus a partial-download fixture.
2026-10-18 03:40:16 +00:00
2021-08-23 14:48:24 +09:00
2022-06-20 19:01:25 +09:00

subtracks logo subtracks

f-droid github downloads Translation status license

subtracks is an open source Android client for Subsonic-compatible servers (Navidrome, gonic, LMS, Nextcloud Music and more). It is written natively in Kotlin and Jetpack Compose and gives you clean, convenient access to your music in the style of a modern media player.

Screenshots

home now playing albums album artist

Download

See signing/README.md for the fingerprints and the commands to verify a download.

Features

  • Large Libraries: Built for very large libraries, from syncing the whole collection to playing playlists with thousands of tracks.
  • Downloads: Song and bulk downloads, with download quality (encoding, bitrate) and metered-connection settings.
  • Offline Mode: Stars, scrobbles and play counts queue up while you're offline and sync back to the server when you're online again.
  • Artwork-first: Album and artist art everywhere, shown full-resolution in the detail and now playing views.
  • Adaptive Theming: Colours drawn from the current song's artwork.
  • Search: Fast search across the whole library, with per-list sort and filter controls.
  • Playback: Gapless playback, an editable queue you can reorder and jump through, plus loop and shuffle modes.
  • Up Next: Add items into the currently playing queue without rewriting it.
  • Multiple Servers: Connect several servers and switch between them quickly.
  • Stream Quality: Bitrate and format settings for Wi-Fi and mobile, with automatic switching.
  • System Controls: Media notification and headset/Bluetooth controls.

Building

The project's entire toolchain is provided by a Nix flake. The default devshell provides JDK, Gradle and the Android SDK, so there is nothing to install by hand.

Therefore, to get started, you'll need to install Nix. I prefer Lix.

nix develop
gradle :app:assembleDebug

Test, lint and screenshot commands, plus the integration harness, are documented in AGENTS.md. The architecture is described in docs/architecture.md.

Contributing

The GitHub repository austinried/subtracks is a mirror of the repo hosted on my personal (private) code forge that syncs whenever I commit to it.

Bug reports and feature requests are accepted on GitHub, as well as pull requests, but:

  • A well-crafted issue with clear reproduction and logs for bugs or mock-ups and use case details for features is preferred over a pull request
  • Pull requests will be pulled in as patches to my code forge and then synced back (you'll still be the author, I'll be shown as the committer)

Translations

Want to see subtracks in your language? Visit the project on Weblate to help!

Translation status

AI usage disclosure

This project contains code and documentation generated by LLM, which is created via human prompting, iteration and review. The current native rewrite is based on two (and a half) other iterations of this project that I coded by hand, so the architecture and other decisions behind that are all still coming from me.

License

subtracks is free software, licensed under the GNU General Public License v3.0. It has no ads and no telemetry, and uses only free/libre dependencies.

S
Description
A music streaming app for Subsonic-compatible servers
Readme GPL-3.0
58 MiB
Languages
Kotlin 99.1%
Nushell 0.7%
Nix 0.1%