This audio opens with the deep, resonating sound of a tuba, the lowest-pitched brass instrument. A glissando is then performed, a continuous slide upward or downward between two notes. The tuba's tones are stretched and transformed, becoming a musical journey that feels like a slow, steady incline and decline of rich, sonorous notes. The audio has an almost tangible texture, like a piece of elastic being pulled and then gradually released. It's a captivating exploration of the tuba's range and flexibility, a testament to the instrument's capacity for musical transformation.