In a brass instrument sound is created by the lips, the tubes are merely a resonator. Is it possible to make the vibration modes of the lips audible?
The instrument imposes a resistance: it will not resonate at every frequency. The player buzzes its lips, forcing them to oscillate between two modes. The result is a split tone: two discernible frequencies are generated within the instrument. A second strategy is the use of a second trumpet. With one trumpet in each hand, both are activated by the same pair of lips. When a specific note is played in one trumpet, the overtone buzzed by the lips determines the possible vibration modes in the second trumpet. When one trumpet jumps to a higher overtone, the other trumpet is forced to jump. This limitation determines the harmonic possibilities of the piece.
Constructed as a constant zoom. At each frame the sound reveals hidden details, while the regions at the edges are slowly deleted.
Limites exists in a version for trumpet and ensemble and a version for amplified trumpet