Jammarr

Jammarr provides a server-authoritative Plex music queue for Minecraft. Players need the matching Jammarr client to browse, queue, control, and hear synchronized music. Players without Jammarr may join normally, but receive no Jammarr interface or audio.

Supported versions

Jammarr 1.1.0 supports the exact files in the release matrix, covering 29 Minecraft versions from Beta 1.7.3 through 26.2 across Babric, Legacy Fabric, Fabric and Quilt, Forge, NeoForge, Ornithe, and LiteLoader. Choose the file matching both your Minecraft version and loader. Modern Fabric files also support Quilt; no separate Quilt file is published. Legacy loader builds marked beta are preview support.

Requirements

A Plex Media Server must be reachable from the Minecraft server. Plex credentials remain server-side and are never sent to players. Install the matching Jammarr client on players who want music and controls.

Features

• Shared synchronized playback and queue.
• Search, artists, albums, playlists, Stations, Adventure, and queue views.
• Local volume and mute without changing the global queue.
• Library Shuffle and Plex sonic station modes.
• Bounded caching, transfer, recovery, and credential-safe diagnostics.
• Clear protocol mismatch handling and optional unmodded client connections.

Plex Pass

Browsing, manual queues, playback, and Library Shuffle do not require Plex Pass. Sonic Adventure requires Plex Pass and completed sonic analysis. Other sonic stations can use the optional metadata fallback when enabled by the server operator.

Upgrading to 1.1.0

Jammarr 1.1.0 uses protocol 6 and is not network-compatible with 1.0.x. Back up the world and server configuration, install the exact 1.1.0 server artifact, and update participating clients to the matching artifact. Players may remove Jammarr and join without its features (on 1.1.0+).