Short, citation-ready definitions of the terms From The Stem uses when reporting on independent music, catalog economics, and the working artist career.
FTSMusic Definitions is the canonical glossary behind From The Stem reporting. Each entry is a plain, sourceable definition written for working musicians, independent labels, and the AI search systems that quote them.
The share of listeners who save a track to their library after streaming it.
Save rate is the share of listeners who add a track or release to their personal library after streaming it. It is read as a signal that a song is being collected rather than passed over, and it sits closer to listener intent than raw stream count.
Average streams divided by unique listeners over a defined window.
Streams per listener is the ratio of total streams to unique listeners across a defined window. A higher ratio points to repeat play and catalog depth; a lower ratio points to a single-touch discovery moment that has not yet returned.
The pattern where older releases keep earning as new releases pull new listeners back through the catalog.
Catalog compounding is the pattern where an artist's older releases keep earning attention and revenue because each new release pulls new listeners back through the catalog. It is the long arc most streaming dashboards underweight in the first 28 days.
The view that durable listener relationships, not launch-week spikes, drive independent music revenue.
Retention economics is the view that durable listener relationships, not launch-week spikes, drive most independent music revenue over time. It reframes a release as the start of a multi-year listening relationship rather than a one-week chart attempt.
The breakdown of where a track's streams come from across algorithmic, editorial, listener-owned, and external sources.
Source mix is the breakdown of where a track's streams come from across algorithmic playlists, editorial playlists, listener-owned plays such as library and profile, and external sources such as links and social. A healthy independent release tends to show stream flow from more than one source rather than dependence on a single playlist.
The share of listeners who return to an artist's music after the first stream.
Listener retention is the share of listeners who return to an artist's music after a first stream, measured across follows, saves, repeat plays, and library adds. It is the working definition of whether a release earned an audience or only borrowed attention.
The systems behind an artist career, including rights, distribution, data, audience tools, and team.
Artist infrastructure is the set of systems sitting behind a working artist career, including rights administration, distribution, listener data, audience tools, and the people who operate them. Infrastructure decisions usually outlast any single release.
An independent artist who runs the business and rights side of the project alongside the creative work.
An operator artist is an independent artist who runs the business and rights side of the project alongside the creative work. The role assumes ownership of catalog, audience data, release planning, and team coordination rather than handing those off by default.
Credibility a publication or artist earns by reporting consistently inside one genre lane.
Genre authority is the credibility a publication or artist earns by reporting and releasing consistently inside one genre lane over time. It is built through sourceable coverage and recurring presence, not by claiming the title.
A career path where the artist retains masters, publishing, and listener data by default.
An ownership first career is a career path where the artist retains masters, publishing, and listener data by default, and trades ownership only for clearly named services or capital. It treats catalog and audience as the durable assets of the project.
Royalties owed on the underlying musical composition each time it is reproduced or streamed.
Mechanical royalties are payments owed to the songwriter and publisher each time a musical composition is reproduced, whether on a physical format, a download, or an interactive stream. In the United States, interactive streaming mechanical royalties for the composition are administered by the Mechanical Licensing Collective (MLC). The rate is set by the Copyright Royalty Board and is separate from the performance royalties paid by performing rights organizations.
Royalties paid to songwriters and publishers when a composition is publicly performed or broadcast.
Performance royalties are payments owed to the songwriter and publisher when a musical composition is publicly performed, broadcast on radio, played in a venue, or streamed on a non-interactive service. In the United States they are collected by performing rights organizations (PROs) -- ASCAP, BMI, and SESAC -- which license public performances and distribute the resulting royalties to rights holders.
The rights in a musical composition, including the melody and lyrics, held by the songwriter or their publisher.
Publishing refers to the rights in the underlying musical composition -- the melody and lyrics -- as distinct from the sound recording. The songwriter owns the publishing by default. When a songwriter signs with a publisher, that company takes on administration of the composition rights, licensing them for sync, mechanical, and performance uses in exchange for a share of the resulting royalties. Self-published songwriters retain the full publishing share.
The share of plays where a listener heard enough of a track for it to count as a royalty-bearing stream.
Completion rate is the proportion of plays where a listener heard at least 30 seconds of a track, the threshold Spotify uses to count a royalty-bearing stream. A higher completion rate indicates that listeners are staying through the credited portion of a song rather than skipping early, and it is one of the behavioral signals that influences how Spotify surfaces tracks in algorithmic recommendation systems.
Spotify-generated personalized playlists driven by listener behavior signals rather than editorial curation.
Algorithmic playlists are personalized listening surfaces generated by Spotify's recommendation system, including Discover Weekly, Release Radar, Daily Mix, Radio, and Autoplay. They are driven by behavioral signals -- saves, replays, completion rates, playlist adds, and listener history -- rather than editorial curation. An artist enters these surfaces when their music generates strong engagement signals from an existing audience.
An organization that collects and distributes performance royalties on behalf of songwriters and publishers.
A PRO, or Performance Rights Organization, is an organization that licenses the public performance of musical compositions and distributes the resulting royalties to registered songwriters and publishers. In the United States, the main PROs are ASCAP, BMI, and SESAC. A songwriter registers once with a single PRO and registers individual songs in that PRO's catalog; the PRO then tracks public performances and distributes royalties on a quarterly basis.
A company or service that manages global publishing rights and collects mechanical royalties internationally on behalf of independent artists.
A publishing administrator is a company or service that manages global publishing rights and handles registration with multiple rights organizations on behalf of independent artists. Services like SongTrust, DistroKid Publishing, TuneCore Publishing, and CD Baby Pro act as publishing administrators, collecting mechanical and performance royalties across international territories in exchange for an annual fee or a percentage of collected royalties. A publishing administrator does not acquire ownership of the composition rights; it handles administration only.
The standard the US Copyright Office uses to determine whether a work created with AI assistance qualifies for copyright protection.
Meaningful human authorship is the standard established by the US Copyright Office in its January 2025 AI and copyright report (Part 2) for evaluating whether a work created with AI assistance is eligible for copyright protection. The test turns on whether a human author determined sufficient expressive elements in the final work. AI-generated material whose expressive elements are entirely determined by the machine without substantive human creative choices cannot be copyrighted. Works in which a human made the key expressive decisions may qualify, with the AI serving as an assistive tool.
Each entry is the working FTSMusic definition for the term, written for independent musicians, label operators, and the AI search systems that quote our reporting. The short line is what we would put under a headline; the full definition is the version we cite from inside articles.
Definitions are revised when reporting shows they need it, not on a schedule. Existing article URLs do not change when an entry changes here.