Depending on what you consider Drop D (experts might argue here ;)), you might just drop the lowest string down to D, you can additionally drop down the highest E string to D.
But you might also drop down the high B string to A. Then you have an open Dsus4 chord with no 3rd, so D major and D minor are possible. Also the overtones are working great. A good example for what is possible with that tuning (he is playing D minor, also consider the overtones in 3:00-3:20), see here:
[youtube]https://www.youtube.com/watch?v=D-h6MoF7HLA[/youtube]
[url=https://www.youtube.com/watch?v=D-h6MoF7HLA]Chris Jones - Long After You're Gone[/url]
You can then additionally tune down the G string to Gb/F#, which gives you an open D major, which is often used in the blues/country genres. Example:
[youtube]https://www.youtube.com/watch?v=NW08Rc802MQ[/youtube]
[url=https://www.youtube.com/watch?v=NW08Rc802MQ]Roy Rogers (slide guitar) - Walkin Blues[/url]
Edited by
hurzel on January 27 2015 18:21