Follow the steps below to tune your guitar to open d That sounds like a tuing used by dashboard confessional, only they use d a d d d d, a very cool tuning but you have to be careful when you tune your g all the way down to d because it easily falls out of tune. Keep the fifth string (a) as it is
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The fourth string (d) also remains unchanged
Tune the third string (g) down a half step to f#.
Online tuner for open d guitar tuning How to tune open d through a microphone. There are more than 4 guitar tuning options to choose from, among them standard tuning, drop d tuning, drop d tuning, half step tuning, etc Take it and use it right away, no installations and downloads!
The tuning is most often used in 'country & western' music but it does have other possibilities, which need investigating, for both solo/instrumental work and also for providing a contrasting backing accompaniment for a low pitched singing voice.