This feature allows you to change the tone of the sound originated by audio devices, like microphones. It has 5 preset levels and a bass and (what's the opposite of bass? :p) scale.
You can alter the tone while using the Voice and Video chat options available in "Friends"
Other 2.10 stuff
Music
- Now you can select the options [Type 3] in Settings > Music Settings > Bitmapping. This bitmapping process has been designed exclusively for the PS3 with the goal of improving the audio reproduction.
Video
- DivX y VC-1 WMV (WOOOOOT) are now compatible. *
- The system is now compatible with the Profile 1.1 Blu-ray Disc. **
- A [BD data tool] option has been added ***
*
- To play VC-1 (WMV) files you will need to select the option [Activate WMA reproduction], available in the Settings > System Settings
- It's not possible to play copyrighted files or files compressed with DivX 3.11
- It's not possible to play files bigger then 2GB
**
- Now you have several additional features, like the simultaneous reproduction of the videos in the Blu-ray Disc compatible with the 1.1 Profile. The available features vary depending on the disc.
***
http://www.neogaf.com/forum/showthread.php?t=217980