NIG Music is a Brazilian manufacturer of musical instrument strings and effect pedals based in Caieiras, São Paulo. The company traces its origins to a string factory founded in 1960 by Portuguese immigrants Carlos and Aquiles Bernardo in São Paulo's Freguesia do Ó neighborhood, originally operating under the parent name Rouxinol — Portuguese for nightingale. The modern NIG brand (an abbreviation of Nightingale) officially debuted in 2000 at the Expomusic trade fair, focusing on strings for guitarists and bassists.

NIG offers one of the broadest string catalogs on the Brazilian market, covering electric guitar, bass, acoustic steel, classical nylon, ukulele, banjo, viola caipira, charango, and extended-range sets for 8-string guitars. The company has also developed proprietary TAC anticorrosion treatment and hybrid nylon-steel string sets. In 2010 NIG expanded into effect pedals, building out a lineup that includes the SUPER series and a more compact POCKETS & MINI range, with offerings such as the OctaFuzz.

The brand has historically been associated with prominent Brazilian rock and metal players including Kiko Loureiro, Rafael Bittencourt (Angra), and Juninho Afram, alongside other Brazilian guitarists and bassists. NIG is positioned as a Brazilian alternative to imported string and pedal lines, emphasizing local manufacturing alongside its export business.

NIG has 11 products cataloged on Equipboard, including Chorus Effects Pedals, Overdrive Effects Pedals, and Amp & Cabinet Simulators. Their gear is featured by 5 artists, with the strongest followings in Rock, Metal, and Pop. Notable users include Lari Basilio, Marcelo Barbosa, and Bruna Guimarães.