Stringed instrument, the lowest in the violin family. It is sometimes played with a bow.
The double bass is first used to support the rhythm, before it becomes a solist instrument [very developped in the free jazz].
Selection of double bass players: Oscar Pettiford, Ray Brown, Charles Mingus, Paul Chambers, Ron Carter, Miroslav Vitous, Niels-Henning-Ørsted Perdersen [NHOP]...
Stringed instrument maker since 1720. USA.
Roumanian instrument maker: violins, mandolins, guitars, double basses, cellos... Site in english;
Brasilian double bass maker.