The most common Mandoline has four courses of doubled metal strings tuned in unison. A total of 8 strings.
To make it easy for beginners we’ve included all of them – even though they are tuned in four couples – so you just have to follow along from the top string till the bottom one.
Mandoline Tuning
(Start from your top string)
G3
G3
D4
D4
A4
A4
E5
E5
Viola Online Tuner