Sampling Frequencies And External Synchronization - MyTek Stereo 192 ADC User Manual

Are printing final CD master, we do not recommend recording too hot.
There is no sonic benefit of pushing the level up to 0dBFS. A healthy 1-2-
3 dBs headroom allows more freedom in later processing and mixing of
recorded tracks. The red peak light is triggered digitally when 1 or more
samples are overload. It's not recommended to peak frequently although
occasional overloads might be acceptable.
In typical setup the ADC is running on its internal clock with the rest of
equipment synchronized to Mytek clock either through digital output
signal or wordclock. In this configuration Mytek ADC serves as a very
stable low jitter house clock which increases the integrity and robustness
of the rest of the system. Because of careful design this clock is as good or
better than dedicated studio clock generators. Unlike in lesser quality
equipment there is no sonic benefit in clocking Mytek ADC externally.
Mytek internal clock generator is situated within inches of converter chip
and it will always provide a better jitter performance (approx 10ps) than
any external source which is inherently compromised by cable
connections. If external wordclock or superclock source has to be used for
systemic reasons, the Stereo192ADC clock generator will lock to external
source and use a stabilizing PLL circuit to reduce incoming clock jitter
before it reaches the actual AD circuit.
Stereo96ADC can be operated with any of 6 standard sampling
frequencies or at any frequency btwn. 30k-200k when supplied with
external clock source. The measurable audio band performance (Dynamic
Range) stays virtually the same within all these frequencies.
44.1k will be typically used for printing final master. 48k is recommended
for digital video production.
The high sampling rates are recommended for discerning users requiring
uncompromised sound quality. In this mode the ADC features up to
100kHz bandwidth (instead of 20k for 44.1k) which allows for improved
transient response of recorded music as well as minimized the impact of
brick wall antialiasing digital filters on the upper audio band. The end
effect of hi-sampling recording is a more "analog feel" and easiness of
sound and more natural sounding instruments especially percussion or
cymbals.
A decision of choice btwn. 88.2/176.4k or 96/192k should be made based
on the project flow- there might be benefits for one or the other. 88.2k
may convert to 44.1k with less damaging SRC process, if such process is
available. Most ubiquitous software SRCs are not very good sonically
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Sampling frequencies
and External Synchronization
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