Using a capo
To make chords easier
To match your voice
To change keys (and to be able to play the same chord grips
In stead of tuning down
To brighten the tone of the guitar
To give the song a different timbre
If the action of the guitar is too high, you can lower it by placing a capo
Many songs are in E (also called 'the people's E') for a different timbre the song is transposed to F and to keep the same on strings a capo is placed on the first fret.
Brown uses a capo when playing in any key other than E Major; this enabled him to achieve slurs and trills that would otherwise have been impossible. Gatemouth has long fingers and does not use his index finger. Most of the time he moves his index finger around the capo with his thumb just stuck out straight over the top of his guitar. He is moving that capo around like we move our index finger in barre chords.
Clarence: "I don’t use no pick for one thing. I just use my hand. I use the meat part of my fingers, all five fingers, on the right hand. Then I also pick with my left hand for certain movements. I maybe use my left hand to do pickin’ at the same time with my right hand, my chord hand. I don’t use any picks at all."
Albert explains how he plays a guitar with a capo
Guitar Slim played with a capo on the first fret (F).
Slim had a number-one hit on the Billboard R&B charts for six weeks straight with "The Things That I Used to Do". He claims the song came to him in a dream. In the dream, an angel fought a devil, each of them holding a set of lyrics to a song.
It's a masterpiece of pre–rock-‘n’-roll New Orleans R&B. The guitar sound is warm and up-front, distorted by volume, and backed by a swinging band. Volume was important to Slim's sound, which was, by all accounts, difficult to translate in the studio.
Guitar Slim was a great showman and most outrageous performer in the history of New Orleans music. He would dye his hair the same color as his suit and shoes. One week it was red, the next blue, or yellow, and so on. He would enter a club through the front door, playing while moving through the crowd, and join his band onstage. He exited the stage in the same fashion, proceeding to his car and driving away while still playing.
On February 7, 1959, Eddie "Guitar Slim" Jones died of complications from pneumonia in New York City. He was 32 years old. His death was barely noticed due to another tragedy earlier that week, when Buddy Holly's plane went down in a cold Iowa night.
Sources: thegearpage, Thomas Moon: The Verdict Of Big Joe Williams, weeniecampbell.com, BBC news, Talkin' to myself: Blues lyrics, Michael Taft, digitalcitizen.ca, federalcigarjugband.com, pancocojams.blogspot.nl, americanbluesscene.com, YouTube, Wikipedia, Hudson Motors Compagny, Archive Minneapolis, The Cruel Plains, M.H.Price a.o., truewestmagazine.com, The Austin Chronicle, Cambridge Free English Dictionary, Oxford Dictionary, TheSaurus.com, dragonjazz.com/grablue/blues_travel, Encyclopedia of African American Popular Culture, Blues by Paul Breman, Blues by David Harrison, Quora.com, urbandictionary.com, Blogs.loc.gov, The Ballad Hunter by Alan Lomax, Black Pearls: Blues Queens of the 1920th by Daphne Duval Harrison, jopiepopie.blogspot.nl, redhotjazz.com, The Blues Lyrics Formula by Michael Taft, American Ballads and Folk Songs by Alan Lomax and John Avery Lomax, The Past Is Not Dead: Essays from the Southern Quarterly by Douglas B. Chambers, EarlyBlues.com, railroad-line.com, Jason Lee Davis' RailFan Pages , centertruthjustice.org