Anyone experimented with tuning in 5ths á la Joel Quarrington? Certainly an interesting alternative to the fingering positions used to navigate the fingerboard tuned in 4ths (and actually nothing new).
Young bass player Tomoya Aomori is exploring this as an interactive project inviting participants via his web site [url="http://www.playthe5bass.com"]http://www.playthe5bass.com[/url] Full of downloads, ideas, etudes and media.
It may not be so user friendly an idea for many especially given the easy transition of tuning in 4ths from horizontal BG to vertical EUB/DB but an entirely different approach to playing the DB based on cello pedagogy . Here's a vid below from Barrie Kolstein master luthier explaining why for classical music it makes a lot of sense and he also suggests that from a luthiers point of view 5th tuning brings some instruments to life.
[media]http://www.youtube.com/watch?v=79xJC3EP8VY[/media]
The tuning is to fit the bass with a low C, followed by a G, D, A ( at least the D string doesnt change from 4th tuning!).