bass chords

its the same cords!! the bass(upright,acoustic, or electric) all have  the 3,4,5,6th strings on the guitar, and you call them g,d,a,e and you call them 1,2,3,4 on the bass! 
we are all on the same sheet music!! learn the nashville numbering system, and the notes go round and round !! simple!
if you play a song in G, then G is 1, A=2,B=3,C-4,D-5,and so on.   if you play upright bass, you play the 1 & the 5 notes
so in G, you play G(1) and the D(5).  so its g-d,g,d, when the music changes you change.
if you are playing bluegrass, the song usally goes 1-4-5 progression, so if you start in G & D, then the next set would be the 4th, so count G1,A2,B3,C4,D5
SO THE 4TH IS the C, AND THE 5TH IS D.  SO C IS NOW the 1 and count CDEFG, IT WOULD BE G. SO C-G ARE THE 2 STRINGS YOU PLAY, THEN THE SONG GOES ON TO D AND the D MATE IS A. SO ITS D-A!  THAT'S 1-4-5.
IM JUST STARTING OUT,AND THAT'S WHAT NO ONE WANTS TO TELL YOU!! BUT AFTER YOU BUY ENOUGH DVD'S YOU FIND OUT. ITS SIMPLE! YOU JUST HAVE TO KNOW YOUR NOTES AND WHERE THEY ARE ON THE FINGERBOARD.
G&D, D&A, A&E, F&C, C&G , 1&5 JUST LEARN TO COUNT! 1 TO 7 AND THEN BACK TO 1 AGAIN AND START OVER!

playing upright bass, there ain't any frets! so you have to know where to find the notes, so we mark the neck until we do know about where they are on the fingerboard. and my joints are sore!! my elbow is killin me! it looks easy, but it ain't!!