Tablo has announced the addition of Dolby Digital 5.1 surround sound to its lineup of OTA DVRs. Rolling out gradually to existing users via a new firmware update (2.2.22), the new feature will allow Tablo devices to capture and pass AC3 surround sound audio through to supported viewing devices. The Tablo team notes that the feature has been a long time coming due to the problems with the DVR hardware only being engineered to deliver a single audio…