Sony SCD-777ES - Manuel (Page 19)

Playing Discs
19 GB
Listening to a CD Using a
Filter
(Digital Filter Function)
This player is equipped with a variable coef ficient (V .C.*)
digital filter . By selecting one of five types of filters
(“STD,” “1,” “2,” “3,” and “4”), you can adjust the sound
to match your listening envir
onment and the music
sour ce.
*V.C. is a trademark of V
ariable Coef ficient. For details,
see “What is a variable coef ficient (V .C.) digital filter?”
Note
Digital filters are effective only when you play a conventional
CD. You cannot select the digital filter when you play a Super
Audio CD.
Press FILTER repeatedly until you locate the filter
you want.
If you pr ess FIL TER to change the type of filters during
play , “D-Fil Setting” appears in the display and the sound
will be inter rupted momentarily
.
Characteristics of each digital filter
The contents and characteristics of the five digital filters
are as follows:
STD: Standard (sharp roll-off)
Provides a wide fr
equency range and spatial feeling, as it
holds the most information among the five filters.
Suitable for playback of classical music.
1 : Clear (slow roll-off)
Provides smooth and power
ful sound with clear image
position.
Suitable for playback of jazz band performances and jazz
vocals.
2: Plain (slow roll-off)
Provides fr esh and ener getic sound with rich vocal
expr ession.
Suitable for playback of vocal performances.
3: Fine (slow roll-off)
Provides well-balanced natural sound, with a lar
ge scale
feel and rich r everberation.
Suitable for listening to any kind of music when you ar e
relaxed.
4: Silky (slow roll-off)
Provides a wide scale feel with associated subtleties.
Suitable for light classical music, especially strings.
What is a variable coefficient (V.C.) digital
filter?
CD players use digital filters to eliminate the noise
generated during sampling. Y
ou can change the tone of
your music by changing the cutof f characteristics of the
digital filter .
Sharp roll-off and slow roll-off
Digital filters can be r
oughly classified into sharp r oll-of f
types and slow r oll-of f types, accor ding to their cutof f
characteristics.
Sharp r oll-of f filters quickly cut of f noise over 22.05 kHz
generated during sampling. This is a superior way of
completely r epr oducing signals below 20 kHz and is the
basic principle behind digital audio.
On the other hand, slow r
oll-of f filters cut of f noise
generated during sampling, and ar e able to hold pr e-
ringing and post-ringing (a kind of sound smearing) in
the impulse r esponse signal to a minimum.
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.
22.05k 0
-120
0
(Slow roll-off filter)
(Sharp
roll-off filter)
Comparison of impulse response for sharp
roll-off filter and slow roll-off filter
Sharp roll-off filter
Post-
ringing Pre-
ringing
Slow roll-off filter
Pre-
ringing Post-
ringing
Frequency (Hz)
Comparison of cutoff characteristics for
sharp roll-off filter and slow roll-off filter
Response (dB)
! FILTER
(power)