- Canon (music) (Wikipedia)
In music, a canon is a contrapuntal (counterpoint-based) compositional technique that employs a melody with one or more imitations of the melody played after a given duration (e.g., quarter rest, one measure, etc.). The initial melody is called the leader (or dux), while the imitative melody, which is played in a different voice, is called the follower (or comes). The follower must imitate the leader, either as an exact replication of its rhythms and intervals or some transformation thereof. Repeating canons in which all voices are musically identical are called rounds—familiar singalong versions of “Row, Row, Row Your Boat” and “Frère Jacques” that call for each successive group of voices to begin the same song a bar or two after the previous group began are popular examples.
- Mitragyna speciosa (Wikipedia)
Mitragyna speciosa (commonly known as kratom, an herbal leaf from a tree of the Rubiaceae family) is a tropical evergreen tree in the coffee family native to Southeast Asia. It is indigenous to Thailand, Indonesia, Malaysia, Myanmar, and Papua New Guinea, where it has been used in herbal medicine since at least the 19th century. It has also historically been used for chewing, smoking, and tea. Kratom has opioid properties and some stimulant-like effects.