Radio Sync is an iPhone app that allows you to delay an audio signal in order to synchronize it with another signal. You can use it so sync a live event that is broadcast simultaneously on television and radio. The app is built in xCode and Objective C and distributed via the Apple App Store.
Anachronism Press Case Study
The delay time of a live television signal varies, but typically ranges from four to ten seconds.
Build an app that accepts an audio signal as input and delays the signal by a specified amount of time so the signal can be synced with another audio signal broadcasting the same content via a different medium. For example, delay the radio broadcast for a football game so it syncs with the slightly delayed television broadcast.
Below is the Radio Sync app as it appears on iPhone, as well as a technical diagram showing how to configure Radio Sync using an iRig audio input device.