Sonifex RB-ADDA Converter
The Sonifex RB-ADDA Converter is a rack-mount converter which produces an AES/EBU or S/PDIF level digital audio output from a balanced XLR or unbalanced phono stereo audio input.
It also produces a stereo balanced XLR or unbalanced phono output from an incoming AES/EBU or S/PDIF digital input signal. The unit operates in four modes:
- Master Mode: In this mode the unit receives an analogue audio signal, which is digitised and formatted for digital serial transmission (IEC958). The necessary clock signals are generated internally from an on board master clock at a selectable rate (32kHz, 44.1kHz, 48kHz or 96kHz).
- Slave Mode: In this mode the unit automatically detects the presence of a digital audio sync signal, if present at the digital input, and synchronises the digital output to it. If no sync is present, no output will be generated.
- Auto Mode: Here the unit synchronises to the digital audio sync signal if present at the digital input and uses the internal master clock only if no sync input signal is detected. In this case, the internal master clock is used at the selected sample rate.
- Auto Lock Mode: This operates like the auto mode except that if no sync input signal is detected, it will use the internal master clock to sync to the sample rate which was last clocked to.
What We Think
Sonifex converters are sonically wonderful boxes! For anyone needing stereo A/D and stereo D/A channels in one box this is a great investment. A "set and forget" design, adjustments and connections are made on the rear leaving you with an attractive bright red face place. No meters, no front panel gain pots (gain pots on the rear adjust gain over a wide range of level) and no dedicated wordclock (the RB ADDA either acts as master with its internal clock or syncs to incoming signals) just good sounding digital audio that has depth and detail. For no frills high quality sound, you cannot go wrong with the Sonifex Red Box!
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