The song Krati Bris was composed by Reb Sholom Brochshtat in 5750 (1990), in honor of the Lubavitcher Rebbe's 88th birthday. The song is based on the chirping of birds, which Brochshtat heard outside.
The lyrics of the song are taken from the chapter in Tehilim (Psalms) that the Rebbe was reciting that year.
Reb Sholom Brochshtat
Shiru Lamelech