01
Choir singers
Hear your section in context and work on difficult passages between rehearsals.
Create practice tracks from your choir recording
Find your place in the harmony. Separate a choir recording into soprano, alto, tenor and bass, then hear your part clearly or rehearse against the other voices.
Processing mode
Output format
Estimated costAbout 80 credits
Choir Voice Separator
Find your place in the harmony. Separate a choir recording into soprano, alto, tenor and bass, then hear your part clearly or rehearse against the other voices.
How it works
Make SATB practice tracks from a recording
1Step 1
Upload the choir recording
Use an a cappella performance, an existing choir stem or a choir recording with accompaniment.
2Step 2
Separate the four voice parts
Choose the input mode and create soprano, alto, tenor and bass outputs. SATB means these four standard choir sections.
3Step 3
Shape your rehearsal mix
Solo a part to learn it, raise its volume against the ensemble, or mute it for a sing-along challenge. Export the mix for practice.
What you can do
Hear a choral arrangement from your section
SATB separation turns a complete choir recording into flexible listening material for singers, directors and rehearsal leaders.
Isolate soprano, alto, tenor and bass
Bring one of the four choir sections forward for a focused listen. Study entrances, words and inner harmonies that are harder to follow in the full ensemble recording.
Learn with your part, rehearse without it
Start with your voice part soloed, then bring the other sections back in. Lower or mute your own part when you are ready to practice holding it against the ensemble.
Work from accompanied or a cappella choir
Use the accompanied mode to separate the instrumental layer before the choir split. For an a cappella recording or prepared choir stem, process the voices directly.
Export choir practice tracks
Save an individual section or a balanced rehearsal mix as MP3 or WAV. Prepare different listening versions from the same recording without repeatedly rebuilding the whole task.
Made for your workflow
Rehearsal material for every voice in the room
Create practice tracks from the choir audio you already use.
02
Choir directors
Prepare section-specific listening material from a reference or rehearsal recording.
03
Section leaders
Highlight entries and harmonies for the singers in your section.
04
Music educators
Demonstrate how four-part harmony works by bringing sections in and out.
FAQ
Questions about choir voice separator
It estimates separate voice sections from a combined choir recording. Lacuna targets soprano, alto, tenor and bass so you can listen to a section on its own or build a practice mix around it.
SATB stands for soprano, alto, tenor and bass: four common voice sections in a choir. SATB separation produces section-level audio, not a separate file for each singer.
Yes. Upload your reference or rehearsal recording, choose whether it contains accompaniment, and separate it. Solo or raise your part while learning, then lower it and export a mix for practice.
Choose Choir with accompaniment when instruments are present. The workflow separates a vocal layer before the SATB split. When an instrumental backing is returned as an additional output, you can bring it into your rehearsal mix.
No. The tool works with the four SATB sections. Divided soprano or alto lines may remain together, and soloists, unison passages or closely overlapping ranges can be difficult to assign cleanly.
The browser workspace is for creating choir practice tracks from audio you upload. It does not provide a catalog of scores or pre-recorded rehearsal parts, and it does not synthesize parts from sheet music.
Yes. Mute or lower your section in the mixer, keep the other sections audible and export the result. You can also keep your part quietly in the background as a guide.
Closely blended vowels, shared pitches, room reverb and crossing voice ranges can leave bleed or artifacts. Use the result as listening support and check unclear notes against the score or a rehearsal leader.
Keep working
The next step for your recording
Hear your part inside the harmony
Upload a choir recording and build a rehearsal mix around your voice section.