This is the grandfather of the string family. At over 6 feet long, the double bass is the biggest member of the string family, with the longest strings, which allow it to play very low notes. The 6 to 8 double basses of the orchestra are almost always playing the harmony. They are so big that you have to stand up or sit on a very tall stool to play them, and it helps if you have long arms and big hands. Like the cello, the body of the double bass stands on the ground, supported by a metal peg, and the neck rests on your left shoulder. You produce sound just like on a cello, using the left hand to change pitch and the right to move the bow or pluck the string.