Editing Concatenation (section)

===Audio and telephony===
In programming for telephony, concatenation is used to provide dynamic audio feedback to a user. For example, in a "time of day" [[speaking clock]], concatenation is used to give the correct time by playing the appropriate recordings concatenated together. For example: "at the tone, the time will be", "eight", "thirty", "five", "and", "twenty", "five", "seconds".

The recordings themselves exist separately, but playing them one after the other provides a grammatically correct sentence to the listener.

This technique is also used in number change announcements, [[voice mail]] systems, or most telephony applications that provide dynamic feedback to the caller (e.g. [[moviefone]], [[tellme]], and others).

Programming for any kind of computerised public address system can also employ concatenation for dynamic public announcements (for example, flights in an airport). The system would archive recorded speech of numbers, routes or airlines, destinations, times, etc. and play them back in a specific sequence to produce a grammatically correct sentence that is announced throughout the facility.