Instrumentalist Royal Academy by Gideon keys - 5 - string bass guitar tuning 5 string basses are becoming more common. They can be tuned adding an extra low string B, E, A,
5 String Bass TUNER B-E-A-D-G (HD) - YouTube
Video - 5 string bass-1/2 step down tuning (hd)
Ultimate 5 String Bass Tuner (B E A D G Tuning) - YouTube