Alternate mixes and stems give producers and labels options without requiring a full recall

Alternate mixes are separately printed mix versions that provide minor variations — vocal up/down by 0.5-1.5 dB, instrumental, TV mix (no vocal), vocals-only — so that post-production fixes and format requirements don’t require rebuilding the entire mix. Stems extend this further: stereo submix groups (rhythm bed, lead vocal with effects, backing vocals, bass, etc.) that a dubbing mixer or music supervisor can recombine. In film, stems are standard because the music mix will be combined with dialog and sound effects on the dubbing stage. With DAW recall, alternate mixes are less critical than in the analog era (a full recall is possible), but many top mixers still deliver them to avoid any chance of having to return to the mix.

Examples

Standard alternate mix list for rock/country: Album Version, Vocal Up, CHR Mix (softer guitars), AOR Mix (more guitars/drums), TV Mix, Vocals-Only. Jimmy Douglass: ‘I still supply a vocal up and a vocal down, an a cappella, and lead a cappella, and instrumental, and then I’ll create stems for them.‘

Assessment

A label asks for a ‘recall’ to raise the lead vocal by 1 dB in the bridge. You delivered the mix three weeks ago. Describe (1) how a prepared set of alternate mixes might solve this without a session recall, and (2) when stems would be necessary instead.