The track appears in gray and cannot be played.
- The following tracks appear in gray and cannot be played:
- Tracks that are not 2ch, even if the file extension is supported by the HDD AUDIO PLAYER.
- Tracks that are identified as unplayable tracks by the HDD AUDIO PLAYER.
- Tracks cannot be played if the music files are corrupted or the HDD AUDIO PLAYER fails to read the data because of vibration.