The alleged leader of an upstate sex cult is into progressive rock, even if his views on women are highly regressive.

Nxivm leader Keith Raniere is a fan of the 1970s prog bands Genesis and Yes, a former “slave” testified at his human-trafficking trial in Brooklyn federal court Tuesday.

Raniere is accused of running a secret society that starved and branded women who were coerced into having sex with him.

A witness referred to as “Daniela” told jurors Tuesday she often used the computer Raniere kept in his upstate Waterford home-office, which he allegedly used as a sex lair, including import copies of the cult leader’s CDs onto the machine at his request.

Amid the stacks of music, Daniela found “Yes and Genesis — several albums of that,” she testified.

Raniere also kept jazz records and classical music — including a Baby Mozart CD for infants, she said.

Also on the computer were nude photos of fellow cult members, she said.

“It was pictures of women I knew Keith was with,” Daniela testified.

Raniere allegedly required the women provide the nudes as “collateral” for joining his group — then used the illicit snaps to blackmail the women.