In the audio titled "Whistle 2", the main feature is the sharp, clear sound of a tin-whistle being blown. The whistle is loud and unmistakable, carrying a sense of urgency and attention-grabbing quality. The tone and pitch of the whistle is reminiscent of classic cartoon sound effects, drawing parallels with scenes where a character's action or entrance is punctuated by a high-pitched whistle. The whistle's echo suggests a resonant, possibly metallic nature, reinforcing the tin-whistle attribute. The whistle is blown twice, each time with equal intensity, creating a memorable auditory experience.