A firmware update for the PlayStation 3 is expected today (26 June) which adds a few new features that may seem minor to some, but will be well received by others.

Software update v4.20 will add virtual surround sound support for Sony's proprietary Wireless Stereo Headset when used with DVD or Blu-ray content. The company will also implement changes to its power save functionality. After the update hits, the PS3 will be able to switch itself off automatically after an hour of inactivity.

This latter mode will be able to be manually adjusted via "System Auto-Off" in the Settings menu on the XrossMediaBar.

Another main change will be the option to alter the volume of audio feedback through the Wireless Stereo Headset (known as "sidetone") which allows a gamer to hear their own voice when playing multiplayer games. The option was introduced in a previous update (v4.10), but there will now be more control over it.

Finally, the small but welcome ability to select multiple saved data items for deletion or transfer is coming too. Up until now, you had to move or erase files one by one.

Other less obvious software tweaks and fixes are also expected.