T+A Elektroakustik DAC 8 DSD Betriebsanleitung Seite 46

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FILTER
(Bandwidth)
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46
 BEZ 1 (blue LED) is a Bezier interpolator combined with a IIR filter.
This process produces a result very similar to an analogue system.
 BEZ 2 (red LED) is a pure Bezier interpolator – offering perfect
"timing" and dynamics.
Please refer to the Chapter 'Technical description - Digital filters /
Oversampling ' for an explanation of the different filter types.
With the  button, the bandwidth of the analogue output filter can
be switched between 60 kHz ("CLEAN"-mode) or 120 kHz ("WIDE"-
mode).
The "WIDE"-setting allows a more spacious music reproduction.
DSD signals are characterised by a high-frequency noise floor in the
ultra-sound region. This noise is inherent in the DSD principle, and is
present in the recording itself. In basic terms the higher the sampling
rate, the lower the high-frequency noise. At 2,8 MHz (DSD64) this
noise is by no means negligible, and may constitute a problem for
amplifiers and loudspeakers connected to the system. For this reason,
the bandwidth cannot be switched to the 'WIDE' mode when playing
2,8 MHz DSD files (DSD64).
Please refer to the Chapter 'Technical description - Digital filters /
Oversampling ' for an explanation of the "WIDE" mode.