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Oversampling 2 (Impulse optimised filter)
Shortening the filter (lower coefficient) reduces the time range errors, albeit
combined with a slight loss of linearity in the frequency range and damping
performance.
Frequency response and transient characteristics of the short FIR filter
Oversampling 3 (Bezier-interpolator plus IIR-filter)
In this process an ideal Bezier interpolator is combined with what is known as
an IIR filter. This eliminates the problematic pre-echo of the FIR method. This
process produces highly „analogueue" system characteristics, with a sound
quality and measured performance similar to those of good analogueue record
players.
Frequency response
and
interpolator plus IIR filter
Oversampling 4 (pure Bezier interpolator)
This process delivers a perfect reconstruction of the original music signal. It
exhibits no pre- or post-echoes of any kind, and does not add coloration or
timing errors to the original signal. In sonic terms this method offers an
impressive blend of naturalness, good dynamics and accuracy.
Frequency response
and
interpolator
transient
characteristics
transient
characteristics
of
the
Bezier
of
the
Bezier
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