Production & assets
Audio Stems
Audio stems are separate submixes of a finished track — typically drums, bass, harmony, melody and vocals — exported as individual synchronised files. They let an editor rebalance, mute or rebuild a piece of music without going back to the composer or working with a single flattened mix.
In practice
Stems are what turn one track into many usable versions. An editor can drop the vocal for a voice-over section, keep only percussion under dialogue, build a fifteen-second cutdown from a two-minute piece, or raise the melody for the final beat of an advert. Without stems, adapting music to picture means crude fades on a stereo mix. Most subscription libraries either withhold stems or place them behind a higher tier, and even then supply them under the same time-limited licence as the mix.
How SoniBuyout® handles it
A SoniBuyout transfers the track itself, not a delivery format: the assets you receive are yours to edit, re-mix, re-arrange and re-export forever, with no separate stem tier and no clause restricting derivative versions.
Real questions
What is the difference between stems and multitracks?
Multitracks are every individual recorded channel, often dozens. Stems are grouped submixes — a handful of files that are far easier to work with in a video edit.
Do I need extra rights to edit stems?
Under a licence, usually yes: editing creates a derivative work and many licences restrict it. Under an ownership transfer, no permission is needed at all.
Related terms
Own the track instead of renting it
Sonify Music sells exclusive buyouts of catalogue tracks: one payment, full ownership, the track removed from sale and a named certificate of ownership.