LPAC 是 无损预测音频编码 Lossless Predictive Audio Compression的英文缩写，它是 Tilman Liebchen、Marcus Purat 与 Peter Noll 在 Institute for Telecommunications，Technical University Berlin（TU Berlin）开发的改进的无损音频压缩算法。与传统的有损音频压缩不同，它是用无损方式对脉冲编码调制音频进行压缩的方法。

由于它的一个高级版本已经成为名为 MPEG-4 ALS 的正式标准，所以它已经不再进行开发。

LPAC is a Super PAC founded in 2012 to represent the interests of lesbians in the United States, and to campaign on LGBT and women's rights issues. According to its chair it was the first Super PAC of its kind. Its supporters include Billie Jean King, Jane Lynch, Laura Ricketts and Urvashi Vaid. On its first day of operations, LPAC raised $200,000. In April 2015 LPAC endorsed Hillary Clinton's 2016 presidential campaign.