What are the notes of baby on or in octavina or in banduria?

In the context of the banduria and octavina, which are traditional Filipino string instruments, the notes are typically tuned to a specific scale. The banduria usually has a tuning of E-A-D-G-B-E, while the octavina is often tuned to A-D-G-C-E-A. Both instruments are commonly used in Filipino Folk Music and can play melodies and harmonies characteristic of the culture. The "baby" note you mentioned may refer to a particular pitch or melody that is simple and catchy, often used in children's songs.