The calls, made to Newtown, Connecticut, police, are scheduled to be made available to the media on CDs at 2 p.m. ET.
The release of the recordings will be administered by the attorneys for the Town of Newtown at their offices in Danbury.
Calls to the state police in Litchfield are not a part of this group of recordings.
The Associated Press had challenged authorities' refusal to release the 911 tapes.
Last week, Connecticut Superior Court Judge Eliot Prescott upheld the Connecticut Freedom of Information Commission's ruling to release calls related to the December 14, 2012 shooting. A state attorney had tried to block the release to shield the victims' families.
Judge Prescott wrote, "Delaying the release of the audio recordings particularly where the legal justification to keep them confidential is lacking, only serves to fuel speculation about and undermine confidence in our law enforcement officials."
"Some of the families … have actually posted on Facebook saying, 'We feel like our privacy has been invaded again,'" Brown says.