When I play back a music CD with my computer (PCGA-CD51 or PCGA-CD51/A), the frequency range of 1KHz-2KHz of vocals is nearly inaudible.

When I play back a music CD with my computer (PCGA-CD51 or PCGA-CD51/A), the frequency range of 1KHz-2KHz of vocals is nearly inaudible.

When I play back a music CD, it is sometimes difficult to listen to vocal sound in the frequency range of 1KHz-2KHz.

Check the settings of "Volume Control" and "Bass Boost".

The frequency range of vocals is 1KHz-2KHz. Not only this frequency range but also some particular frequencies are not sometimes played back at lower level.
If you feel strange about reproduced sound, check the following points.
(Some of the following setting items may not be available depending on models.)

(Points to be checked)

- Settings of "Mute" of "3D Wide" on "Volume Control"
When you disable "Mute", a music CD sounds differently sometimes due to the enabled surround effect.

- Settings of "Bass Boost" of "Sony Notebook Setup"
When this setting is turned on, bass from the headphone terminal will be boosted, which sometimes suppresses treble.

- Settings of the equalizer of the software of CD players
As its settings vary depend on the playback software of CD players, check how to set it with the "Help" of the software.