[Arny Krueger]

http://www.lavryengineering.com/docu...ing_Theory.pdf


"
Conclusion:
There is an inescapable tradeoff between faster sampling on one hand and a
loss of accuracy,
increased data size and much additional processing requirement on the other
hand.
AD converter designers can not generate 20 bits at MHz speeds, yet they
often utilize a circuit
yielding a few bits at MHz speeds as a step towards making many bits at
lower speeds.

The compromise between speed and accuracy is a permanent engineering and
scientific
reality.

Sampling audio signals at 192KHz is about 3 times faster than the optimal
rate.
It compromises the accuracy which ends up as audio distortions.

While there is no up side to operation at excessive speeds, there are
further disadvantages:

1. The increased speed causes larger amount of data (impacting data storage
and data
transmission speed requirements).

2. Operating at 192KHz causes a very significant increase in the required
processing
power, resulting in very costly gear and/or further compromise in audio
quality.
The optimal sample rate should be largely based on the required signal
bandwidth. Audio
industry salesman have been promoting faster than optimal rates. The
promotion of such ideas
is based on the fallacy that faster rates yield more accuracy and/or more
detail. Weather
motivated by profit or ignorance, the promoters, leading the industry in the
wrong direction, are
stating the opposite of what is true.
"