SOLO Tuning

Solo Tuning strings vary slightly from standard, "orchestra tuning" (G-D-A-E, high to low). "Solo tuning" is one full step higher: A-E-B-F# (high to low), while maintaining the same familiar string tension and balance as their standard-tuning counterparts. So the bass plays and feels the same as it does with "regular" strings - but is pitched one whole step higher.

Why? Simply, the higher tuning puts the higher pitches more "in reach" for someone playing solo repertoire. It can also provide a brighter tone, and better projection, for a solo performer who is playing melodic lines -- which often tend to use higher notes. 

Another reason you might use them: If you play contemporary, bluegrass, or jazz styles - there's another popular reason to get solo tuning strings. You can install a solo set and tune it down to "normal" G-D-A-E tuning. This provides a lower tension than orchestra/medium gauge, to provide a "light" tension option for a string that the player likes. This gives a light option for strings that offer a solo set, but not a light (aka weich) set; Pirastro Obligatos and Thomastik Superflexibles are two common, popular examples. If a stringmaker offers BOTH light and solo strings (like Thomastik Spirocores, Pirastro Evah Pirazzi), you'll usually find that the solo set - tuned to standard pitch - is slightly lighter than the light/weich set, but this isn't a hard and fast rule.

More Info, including a free way to test if you'll like the solos tuned to EADG.