Audio

An audio signal is a representation of sound.

1. by changing the level of electrical voltage for analog signals
2. or by a series of binary numbers for digital signals

Range: 20 - 20,000 Hz

• lower and upper limits of human hearing
• characterized by parameters
  • bandwidth
  • nominal level
  • power level in decibels (dB)
  • voltage level
• Signal paths are either
  • single-ended
  • balanced

Digital audio is sent over:

• optical viber
• coaxial cable
• or, twistsed pair cable

Digital audio code formats:

• ADAT
• TDIF
• TOSLINK
• S/PDIF
• AES3
• MADI
• audio over Ethernet
• audio over IP

Citations

https://en.wikipedia.org/wiki/Audio_signal

TO READ

• https://en.wikipedia.org/wiki/Audio_frequency
• https://en.wikipedia.org/wiki/Digital_audio