How do you use an audio snake?

How do you use an audio snake?

https://www.youtube.com/watch?v=a6KvaLL-K6w

How long can a audio snake be?

Snake lengths commonly range from 50 feet to 150 feet, although almost any length is available. A snake's configuration is marked by its number of mic lines (lines in), its number of return lines (lines out), and its combination of connectors at each end.Nov 22, 2013