Using The Display - Sony CDP-XA30ES Operating Instructions Manual

Playing CDs
3: Analog type
This is a slow roll-off, direct type filter that simulates a
seventh-order analog Butterworth filter. This filter
completely prevents pre-ringing in the impulse
response. Also, since it simulates an analog filter, the
high-region phase outside the audible frequency is
rotated. The filters from 3A to 3C differ in degree of
phase rotation. 3A is multiplied by one (the true analog
characteristic), 3b is multiplied by 0.75, and 3C is
multiplied by 0.5. The impulse response changes as
shown in the figures below. The degree of pre-ringing
and post-ringing varies with the degree of phase
change. This gives the sound a feeling of warmth and
depth.
3A
Comparison of filter 3 impulse response
4: Butterworth
This is a slow roll-off, direct type filter and includes
fifth-order through ninth-order Butterworth filters.
However, the phase is linear and does not include the
phase change possibilities of filter 3 (analog type). As
the figure below shows, only the cutoff characteristics
can be changed in the fifth-order (4A), the seventh-
order (4b) and the ninth-order (4C). Ringing in the
impulse response increases from the fifth-order filter to
the ninth-order filter. This filter gives the sound a
feeling of balance and comfort.
Response
(dB)
Comparison of filter 4 cutoff characteristics
Note
The Digital Filter function primarily changes characteristics
outside the audible frequency. They cannot affect changes
within the audible frequency such as those provided by the
tone controls of the amplifier. Therefore, with certain
combinations of hardware and software, there may be no
noticeable effect after switching the filter.
EN
10
3b 3C
4A
4b
4C
20k
Frequency (Hz)

Using the Display

You can check information about the disc using the
display.
CDP-XA50ES
TIME
CDP-XA30ES
TIME
TIME
Checking the total number and playing
time of the tracks
Press TIME before you start playing.
The display shows the total number of tracks, total
playing time and music calendar.
MIN
Total number of Total playing time
tracks
DISPLAY MODE
1 2 3 4 5
SEC
6 7 8 9 10
Music calendar