The singer's father insisted that her first posthumous LP Lioness: Hidden Treasures would not be released if it was not good.
He told the Evening Standard: "The family view was nothing was going to go out unless it was comparable to Frank or Back To Black.
"If it wasn't as good as that then we wouldn't have allowed it to go out."
Mitch also spoke of his reaction when he first heard the record: "On one hand it was very difficult for us to listen to the album, on the other hand we had to do it to ensure the quality was as it should be."
Island Records boss Darcus Beese recently revealed that there are 12 Amy Winehouse tracks that she didn't want the public to hear and so they have been locked away.
Amy Winehouse's Lioness: Hidden Treasures will be released on December 5. £1 from each copy sold will be donated to the Amy Winehouse Foundation.
> Amy Winehouse producer Salaam Remi: 'New album helps family heal'
Watch the music video for Amy Winehouse's new single 'Our Day Will Come' below: