Jitter reduction
Digital outputs/inputs.
Format conversion
. The interface employs three jitter reduction circuits. One is for the digital inputs, one for
external wordclock input and one for the digital outputs and D/A converter. They stabilize the digital audio
clock without altering the audio data. It translates to smoother and more transparent sound. "Sonic
Solutions" users will especially benefit from these circuits since the original SSP3 card and Sonic optical
converters (now not needed) introduce large amount of jitter.
Digital outputs comply with the AES/EBU, SPDIF (Consumer IEC 958) and
optical Toslink (default set as AES/EBU) standards. (The optical output can be set to SPDIF format by
setting the jumper located just by the optical input connector. You will need to cut "AES" connection and add
"SPDIF" jumper. You also need to move the IC703 (left from jumper) to position IC704). The outputs are
transformer isolated. For best performance use AES/EBU output and a 110 Ohm digital cable. Second in
quality comes SPDIF output which should be used with a 75 Ohm video cable. The optical Toslink interface
works with plastic fiber cable such as for the ADAT.
All digital inputs will correctly read either AES/EBU or SPDIF signal should that be necessary. Jitter
performance however might be compromised because of the impedance mismatch.
. The interface provides instant digital format conversion between all digital inputs and
outputs. Following rules apply:
-all bits are transferred without change. Signal path is 24 bit.
-sampling frequency flag is set by the switch at the front panel. Must be always set right for digital transfers.
-emphasis flag is transmitted as 50/15us flag.
-user bits are zeroed.
-clock jitter is reduced.
To/from computer digital out/in. Workstation AD/DA is made in three flavors to accommodate various types
of workstations on the market. They can be:
-AES/EBU
-SPDIF
-Toslink optical
-Any combination of above (extra in/outs at additional charge)
If your interface has more than one "to/from computer in/out" installed you can use all "to computer" outputs
at the same time but only one "from computer" input can be connected at a time.
4. Jitter reduction and fromat conversion. Digital inputs and outputs.
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