Two ofBig Ben’s six Word Clock outputs can transmit a clock at fractions ormultiples of the sampling rate available rates include fs/4 (¼times the sampling frequency), fs/2, fs ×1, fs ×2, fs ×4and fs ×256. When lockedto an external clock that’s embedded in a digital audio signal, Big Benroutes that signal (with clock) to all digital audio outputs andconverts between AES/EBU, S/PDIF, optical and option-card formats.īig Ben’s internally terminated video/Word Clock input will accepteither TTL Logic (Word Clock) or video black burst (PAL, NTSC orB&W) signals, depending on the unit’s front-panel settings. Big Ben constantly sends digital black out all audiooutput jacks when the unit is slaved to its internal clock. Pull-up and pull-down rates areavailable when Big Ben is synched to its internal clock or an externalvideo signal.
TheToslink optical connectors support S/PDIF optical, ADAT, S/MUX 2 andS/MUX 4 formats at up to 192kHz rate. The S/PDIF co-ax jacks accommodate 44.1 to 192kHz rates. An IEC receptacle roundsout the rear panel.īig Ben’s AES/EBU I/O supports both single- and double-wire formatsand sampling rates up to 192 kHz (and as low as 44.1 kHz in single-wiremode). Big Ben provides aslot for an optional card to accept emerging formats a FireWire I/Ocard ($695) will be available by year’s end. (Ifound the improvement here to be audible, but subtle.) Thanks toSureLock technology, Big Ben continues to output clock signals at thelast valid frequency received by an external reference signal thatsubsequently drops out, purportedly guaranteeing a fail-safe lock.Īll of Big Ben’s I/O connectors are found on the unit’s rear panel.These include AES/EBU inputs and outputs (two each, for a total offour), S/PDIF coaxial and Toslink optical I/O, and one video/Word Clockinput and six Word Clock outputs on BNC connectors. Another bonus: BigBen can even perform digital audio format conversions.īig Ben owes its impressive clocking performance to proprietarytechnologies: Apogee’s Direct Digital Synthesis process - anall-digital alternative to traditional phase-lock loop circuitry- generates clock frequencies with virtually immeasurable jitter.When synched to an external reference, Big Ben uses Apogee’s AdaptiveLoop Filtering to recondition the clock source and reduce jitter. Unlike other Word Clock distribution boxes that achieveonly subtle reduction in jitter artifacts, Big Ben will make yourconverters sound dramatically warmer and smoother.
Apogee Electronics’ Big Ben is a revolutionary master digital clockthat does much more than preclude clicks and pops from tainting youraudio tracks.
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