Customers who own 888|24's with 20-bit DACs may upgrade their units for a fee. The upgrade price covers all parts and service, as well as return shipping to the customer. Customers who purchased 888|24's after June 1st, 1998 are eligible for free upgrades. Contact Digidesign for upgrade pricing.Upgrades require the return of the 888|24 to the Digidesign Service Center.An advance replacement program is also in place. For an additional fee an upgraded unit with 24-bit DACs will be sent to the customer and they would then send in their original unit(s).Contact Digidesign Technical Support for the upgrade.