Explain the difference between 'stems' and 'bounces' in post-production audio.

• A. A stem is a grouped set of tracks (e.g., dialogue stem) intended for flexible delivery; a bounce is a rendered mix file of a stem or final mix.
• B. A stem is a single stereo file; a bounce is a multi-channel file.
• C. A stem is used for video; a bounce is used for audio.
• D. A stem is a final quality file; a bounce is a rough draft.

Answer: (A)

In post-production audio, stems are submixed groups of tracks kept separate for maximum mix flexibility. Think of stems as modular blocks such as dialogue, music, or sound effects that you can re-balance, replace, or adjust without touching every individual track inside them. They’re not limited to stereo; a stem can be multi-channel and still remain a controllable grouping.

A bounce, on the other hand, is a rendered audio file that results from mixing down one or more stems (or the entire final mix) into a single file. This is a fixed deliverable—what you hear is what you get, with no per-track control left in that file.

So the best choice captures both ideas: a stem is a grouped set of tracks designed for flexible delivery, and a bounce is a rendered mix file of a stem or the final mix.

The other interpretations don’t fit because a stem isn’t just a single stereo file, and a bounce isn’t inherently multi-channel-only; both stems and bounces can be stereo or multi-channel depending on the workflow. Also, a stem isn’t inherently a final-quality file, and a bounce isn’t necessarily just a rough draft.