Harmonizer is the thirteenth studio album by the American garage rock musician Ty Segall, released on August 3, 2021, on Drag City Records. Co-produced by Segall and Cooper Crain, the album's initial digital release was a surprise, with physical copies following in October 2021. The album features contributions from Denée Segall, who co-wrote and sings lead vocals on "Feel Good", and the members of Segall's backing band, the Freedom Band: Mikal Cronin (bass), Charles Moothart (drums), Emmett Kelly (guitar) and Ben Boye (keyboards). User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.