- "Ta": This syllable is used for the tonic or "do" note of the major scale.
- "Ti": This syllable is used for the seventh note of the major scale, also known as "te" or "leading tone."
- "Ti-ti": This is a compound syllable that represents two consecutive "ti" notes, which are chromatic alterations of the seventh scale degree. Specifically, "ti-ti" refers to the raised seventh note (also called "ti-sharp") and the lowered seventh note (also called "ti-flat").
In summary, "ta" is used for the tonic, "ti" for the seventh scale degree, and "ti-ti" for the raised and lowered seventh notes. These syllables help singers and musicians solfège melodies, identify intervals, and understand musical structures based on the solfège system.