"Train Call" is an audio installation on the AGTS that includes a variety of short musical sound effects and jingles that precede the system's pre-recorded station and warning announcements. The announcements are delivered by well-known voice talent from the Denver area. Train Call was recorded by sound artist Jim Green, who intended for the sound effects to be playful, friendly, and memorable. Green is also known for recording the audio for the singing sinks in the restrooms at the Denver Art Museum, the "Laughing Escalators" at the Denver Convention Center, and the "Musical Warning Beacons" on the baggage carousels at Fort Lauderdale-Hollywood International Airport.