View source for Audio signal

An '''audio signal''' is a representation of [[sound]], typically as an [[electrical voltage]].

== Description ==

Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz (the limits of human hearing).

Audio signals may be synthesized directly, or may originate at a transducer such as a microphone, musical instrument pickup, phonograph cartridge, or tape head. 

Loudspeakers or headphones convert an electrical audio signal into sound. 

Digital representations of audio signals exist in a variety of formats.

An audio channel or audio track is an audio signal communications channel in a storage device, used in operations such as multi-track recording and sound reinforcement.

== Connectors ==

* [[Phone connector (audio)|Phone connectors]], also known as phone jacks, audio jacks, jack plugs
* [[RCA connector]] -- commonly found on stereo turntables

== Connecting a home stereo to a computer ==

Use two cables, for Line In and Line Out.

Type of cable:  stereo miniplug to [[RCA connector]].

Keep the RCA ends plugged into your home stereo stack.

For use with a laptop or other mobile device, leave the stereo miniplug ends convenient for plugging and unplugging.  

== See also ==

* [[Audio data]]
* [[Audio engineer]]
* [[Electricity]]
* [[Electronics]]
* [[Sound]]
* [[Sound reinforcement system]]

== External links == 

* [https://en.wikipedia.org/wiki/Audio_signal Audio signal] @ Wikipedia

[[Category:Audio]]
[[Category:Electricity]]
[[Category:Sound]]
[[Category:Sound production technology]]