The Sonifex RB-SC2 sample rate converter is a 1U rack-mount which produces AES/EBU, S/PDIF and TOSlink optical level digital audio outputs from a balanced AES/EBU, S/PDIF and TOSlink optical level digital audio inputs. The sample rate of the outputs can be set by an internal clock or from various external synchronizer sources. It supports higher sample frequency rates up to and including 176.4 kHz and 192 kHz. It has 2 independent sample rate converter circuits that use a common clock source to set the output sample rate .It has 2 optional video synchronizing boards. These set the output sample rate to 48 kHz that is synchronized to either an analogue video signal or SDI digital video signal (HD or SD). A special x-Lock mode allows the unit to function as a full bi-directional sample rate converter.

It has TOSlink optical digital audio inputs and outputs. It has front panel push-button switches for all the main settings. The buttons are arranged in sets, where pressing the button advances the current selection and LED indicator. A serial RS232 port is included so that the RB-SC2 settings can be controlled remotely. The front panel LED indicators alter automatically when using RS232 commands. For the digital outputs, there are three push-button switches to select the sample frequency (frequency), channel status bit type (CSDATA) and sync source and mode of operation (SYNC). The frequency button allows selection of the master sample frequency from one of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz or 192 kHz. The CS DATA button defines the content of the channel status bits embedded within the digital audio stream and can be forced to either Professional Mode (PRO), Consumer Mode (CON) or to follow th