MDSD stands for Multiple Double Speed DSD.
The DSD signal has big noise in the high frequency
outside the range of human hearing.
It must be removed.
MDSD works as a low pass filter to cut the noise in the
high frequency and also works as the MDS++ principle to
improve the characteristics in the low frequency.
The point of MDSD is the delay elements.
DSD signal in DP-750 is D/A converted with half-delayed
clocks and is combined when it comes to the output.
As the analog output becomes half-clock time resolution,
it allows the signal to work as the double speed operation.
This configuration means a moving-average filter.
It works completely as a linear phase low pass filter and
removes high frequency noise of DSD signal.
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