Audio letter

An audio letter is an audio recording sent by postal mail to a recipient. The practice was more common when charges for long-distance telephone services were higher and before the widespread use of the Internet.

Discovered audio recordings offer a unique perspective into that time period and have often been used to present historical context in modern-day radio and television programs.

Media used in recording audio letters include:

• Wax cylinder
• Reel to reel
• Cassette tape
• MiniDisc

• MPR Perspective on Vietnam wartime audio letters

• The Audio Kitchen