SATB is an acronym in music that stands for Soprano, Alto, Tenor, and Bass. It is the standard standard scoring for four-part harmony, most commonly used in choral music, but also serving as the foundational structure for Western music theory and composition. Here is a breakdown of the four voices, their ranges, and their roles:

The voices are arranged from highest pitch to lowest pitch:

• S (Soprano): The highest female voice. Role: In most standard hymns and pop arrangements, the Soprano line carries the melody.

• A (Alto): The lower female voice. Role: The Alto line usually provides harmony immediately below the melody. It is often the "glue" that connects the high melody to the lower male voices.

• T (Tenor): The highest adult male voice. Role: The Tenor line provides lower harmony and adds texture to the middle of the chord.

• B (Bass): The lowest male voice. Role: The Bass line provides the harmonic foundation. It usually sings the "root" of the chord, grounding the music.

While SATB describes human voices, the concept is applied to instruments as well. Many instrumental families are built to mimic the SATB range structure:

• Strings: Violin 1 (S), Violin 2 (A), Viola (T), Cello (B)

The provided model works with vocals, strings, piano, and synth melodies. It does not work with full mixes. If you need to process vocal parts, you must provide isolated vocals without the instrumental. For full mixes use option "Extract vocals first".

Metric SDR on internal validation dataset: