Warner Music Group received a subpoena on Dec. 20 from New York Attorney General Eliot Spitzer as part of an industry-wide antitrust investigation into digital-music pricing practices, writes Bloomberg. "As part of an industrywide investigation concerning pricing of digital music downloads, we received a subpoena from Attorney General Spitzer's office as disclosed in our public filings. We are cooperating fully with the inquiry," said Warner Music Group spokesman Will Tanous, who is quoted by Reuters.

Last month, Warner Music agreed to pay $5 million to settle a separate New York state "pay-for-play" probe into how the music industry influences which songs are played on the radio.

Sony BMG paid $10 million in connection with the same investigation and agreed to stop making payments to radio stations for airplay to settle the "payola" probe. Universal and EMI have not yet settled.