['bluegrass', 'semi acoustic mandolin', 'banjo', 'upright bass', 'background noises', 'amateur recording']
A banjo is playing chords while an upright bass is playing a bassline. These two form the rhythmic section. On top of that a mandolin is playing a fast and complex solo. In the background you can hear the crowd cheering and clapping hands. This is an amateur recording. This song may be playing in a big pub.