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5.
Menu items
’
functions：
The following is a detailed introduction of each menu item:
a.
PCM FILTER:
DAC-A18 has a total of 6 PCM digital filter types. Turning Turntable clockwise will
sequentially select in the order of SHARP
——
SLOW
——
SUPER SLOW
——
SHORT SHARP
——
LOW-d
SHOT
——
SHORT SLOW. Turn Turntable counterclockwise The cycle is reversed. SHARP is a fast
roll-off digital filter, which is the most common type of digital filtering. It is the most
accurate and neutral in the sense of hearing. SLOW is a slow roll-off. It has smooth out-of-
band attenuation characteristics of the signal, but also because of its in-band attenuation.
The attenuation characteristic will make the sound soften; SHORT SHARP / SHORT SLOW is a
short delay version of SHARP / SLOW.
SUPER SLOW is similar to the effect of NOS. The extension at both ends is reduced, and the
intermediate frequency is naturally suitable for human voice. LOW-d SHOT is a new filter of
AKM Company, which adopts the asymmetrical pattern of front and rear ringing, and then
produces a new sense of hearing.
A18 recommends the use of SHORT SHARP digital filtering.
b.
DSD Filter:
The DAC-A18 DSD filter has two different bandwidths that can be adjusted, L-BW is low bandwidth;
H-BW is high bandwidth. The AK4499 does not use a fixed frequency as the cutoff frequency of
the filter, but automatically switches according to the DSD sampling rate. Please see the
table below for the cut-off frequency:
* The bandwidth of DSD256 and DSD512 are fixed and are not affected by the options.
