In professional audio, a broadcast is a content delivery vehicle designed to distribute electronic media from presenter to audience in a one-to-many model. Radio broadcasting is a method for sharing audio programming using a one-way audio signal sent through the air as radio waves via a transmitter. As soon as an antenna picks up the audio signal, the radio broadcast is pushed through a receiver to start delivering music, talk, and news simultaneously to a geographically diverse audience. Broadcast audio have several different applications, such as announcing for events, hosting a radio show, delivering commentary, anchoring the news, and offering sports analysis. Broadcast content can be manually controlled by professionals, or automatically controlled by computers, and often uses a combination of on-air live material, recorded past events, and fully automated playlists. A radio broadcast is created and produced using tools and tactics that are similar to those used for audio production activities in live sound, recording, or installed sound environments – but the importance of unique elements like codecs, remote control, and RF equipment set broadcasting apart from other areas of professional audio. Additionally, since the performance, reach, and quality of a broadcast is directly tied to the reliability, strength, and flexibility of its audio signal, there is a significant emphasis on monitoring, alerting, and controlling signal elements.