0chemantics 10 years ago ReplyUpvoteIf you can get one string in tune, you can tune the others to match (that is, if you know how to put your fingers on the board in the correct position). When I was learning to play the upright bass, I had tape across the finger board in the correct position. Anyways, as seandogue was saying you will need something that is already in tune to compare your bass to. When comparing the sound, try to listen for tone beats... if you are close to the right pitch the two similar sounds add up to produce a wah-wah-wah-wah effect. The faster the tone beats are, the farther you are away from being in tune. When they are so slow you can't hear them anymore, then you are really close. Once one string is in tune, play notes on it to tune the other strings. For example, if you got the E string in tune... play an A on it to compare the A string with, and so on. Good Luck!