What are adlibs?
Adlibs (short for ad-libitum, “as you like”) are the small vocal lines that sit around the lead vocal. They are not the main melody: they react to it. In rap and trap they are everywhere, and they give a song its energy and personality.
- Hype and emphasis: short words and sounds dropped at the end of a line.
- Echoes: the last word of a line repeated, often with a delay throw.
- Harmonies: sung notes that support the lead.
- Texture: breaths, whispers and background voices that fill the gaps.
How to record adlibs
- Record them as separate takes after the lead, on their own track, so you can process and level them independently.
- Use the same microphone and distance as the lead, or on purpose a different one if you want them to sound different.
- Change the energy. Adlibs can be more relaxed, louder or more dramatic than the lead; it gives them a different role.
- Leave gaps. Adlibs on every line make a mix crowded. Choose the moments that matter.
- Record doubles of the important ones so you can pan them wide.
How to mix adlibs
- Set the level. Start a few decibels under the lead and balance by ear against the beat.
- EQ. Cut the low end higher than on the lead (a high-pass around 150–250 Hz is a good start) and clear the 200–400 Hz mud. If the adlibs fight the lead, take a little out around 2–4 kHz.
- Compress. Adlibs are shouted, whispered and everything in between, so use a firmer compressor than on the lead to keep them steady.
- Pan and widen. Keep the lead in the centre; move adlibs to the sides, or pan two doubles left and right.
- Add effects on sends. More reverb and delay than on the lead, filtered so the effect does not get muddy. A delay throw on the last word of a line is a classic.
- Automate. Raise the effect sends at the end of lines and pull them back while the lead is singing.
- Check in mono. If an adlib disappears when you sum to mono, the widening is too extreme.
Adlib effects to try
- A band-pass or “telephone” filter for a small, distant voice.
- A pitch shift up or down, or a formant shift for a different character.
- Light distortion or bit-crushing blended in on a send for grit.
- A reverse reverb into the next word.
- A short, tight delay for width, and a longer one for throws.
Flextrik Vocal Presets
4 FL Studio presets (.fst): main vocals, adlibs, bonus.
For the full chain from raw take to finished vocal, see how to mix vocals.
Questions
What are adlibs?
Adlibs are the extra vocal lines around the lead vocal: hype words, echoes of the last word, harmonies and short sounds that add energy and space to a song.
Should adlibs be louder or quieter than the lead vocal?
Quieter. A common starting point is a few decibels under the lead, then adjust by ear so they support the lead instead of competing with it.
Should I pan adlibs?
Usually yes. Keep the lead in the centre and move adlibs left and right, or double them and pan the doubles, so they have their own place in the stereo picture.
How many adlib takes should I record?
Two or three takes of an important adlib are enough to double or stack. Too many layers make a mix crowded.
Can I use a preset for adlibs?
Yes. A preset gives you a starting chain with EQ, compression and effects already set for adlibs. Flextrik Vocal Presets include one for adlibs; adjust it to your voice.