What makes Haih Or Amortecedor by Os Mutantes notable?

The album was well-received, marking a successful return to form for Os Mutantes, who had not released new material for over three decades. It highlighted their continued relevance in the music scene and contributed to the resurgence of interest in Tropicália and Brazilian rock globally, influencing a new generation of musicians. Released in 2009, 'Haih Or Amortecedor' is Os Mutantes' first studio album since their reunion in the late 1990s. This period marked a significant revival for the band, as they sought to reconnect with their roots while infusing modern influences into their sound. The album showcases their evolution from iconic Tropicália pioneers to seasoned artists navigating new musical landscapes.