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Stems (also: group tracks or subgroups) are combined audio tracks that consist of drums, bass, vocals, or effects, for example. They allow for targeted editing of individual mix elements in the Mastering and provide more control over dynamics, frequency balance, and loudness. Stems are particularly helpful in complex productions or for correcting errors in the mix.

Stem mastering offers you the opportunity to specifically influence individual components of your mix – without having to go back to mixing This allows, for example, better separation of kick and bass, or adjustment of vocals in relation to the music. The sound becomes more precise, transparent, and competitive.

Artists typically submit 4–8 stems. Common subdivisions are:

• Drums (including overheads)

• bass

• Kick separately (optional)

• Gitarren

• Synths or strings

• EFX (effects, Atmos)

• Vocals (lead, backings, harmonies)

• Samples or special instruments

This distribution can vary depending on the genre or arrangement. It's important to remember that similar sound sources should be grouped together (e.g., all backing tracks or all strings in one stem).

The following recommendations apply when grouping tracks:

• Which elements belong together in terms of sound?

• Which tracks should be worked on together?

• Where is targeted control over volume, panorama or frequency response necessary?

• Does your song have key elements that need to be clearly highlighted?

Ideally, you leave about −3 dB headroom in each stem and deliver in at least 24-bit WAV/AIFF with 44,1 kHz or higher.

Exporting stems can be done as follows:

• Group the desired tracks in your DAW (e.g. Logic, Cubase, Ableton).

• Switch each group to “Solo”.

• Export each group as a stereo track (WAV or AIFF).

• Alternatively, use your DAW’s multi-export feature for subgroups or buses.

Tip: Make sure all stems have the same length and starting point.

We explain exactly how this works in Logic in this blog article.

The following techniques can be used in stem mastering:

• EQ and Dynamic processing per stem

• MS processing for mid/side signals

• Automated volume corrections

• Saturation and coloration through analog hardware

• Correction of masking in the mix (e.g. vocals vs. synth)

By processing the center and side signals separately, for example:

• The snare in the middle can be made more present

• Guitars are widened in the panorama

• Room parts can be filtered specifically

This leads to more spatiality and better mix-glue – especially effective in combination with our analog mastering.

Yes. DJs use stems, especially in remixing and live performances, to create their own edits. In programs like Traktor or Ableton Live, stems can be controlled via MIDI controllers and enhanced with effects. This allows for creative reinterpretations of existing songs.

Definitely. Even during the recording or during Online mixing services A stem-oriented approach can help you keep track of things and work faster. Stem-based mixes are also easier to edit if correction loops occur.

• Too many or too few stems: The goal is balance. 4–8 is usually ideal.

• No level adjustment: Unbalanced stems make mastering more difficult.

• Unsynchronized starting points: All stems must start at 0:00.

• Clipping or limiting on the stem: Please leave unedited.

• Mixing inappropriate elements in a stem: e.g. bass + vocal is problematic.