Bass

The bass is a musical instrument that can be played by Sims. It was first introduced along with the guitar and drums in The Sims 2: University expansion pack. It isn't available in The Sims 3 base game, but was re-introduced in The Sims 3: Late Night expansion pack, Emeraid Greenwood has a Bass Gutar

The Sims 2: University
The bass in The Sims 2 can be played by Sims aged teen or older, and playing it will boost creativity skill. As the creativity skill improves, the quality of a Sim's playing improves as well, and highly skilled players may perform tricks or complicated moves while playing. The bass can be played alongside other musical instruments - the guitar, piano and drums - and performing on the bass can generate tips from other Sims; the higher the creativity skill level of the Sim playing, the higher possible tips will become (up to §100 per tip).

The Sims 3: Late Night
The bass not included in The Sims 3 or in its first two expansion packs or stuff packs, but was included in The Sims 3: Late Night, along with a related bass skill. The confirmation was made on July 29, 2010 during a Twitter interview with Grant Rodiek, one of the game's producers; the bass is set to return, along with the piano and drums. Unlike in previous games, the bass that appears in this game is an upright double bass, rather than an electric one.