Updating the pre-installed software
When a new version of the software is released, you can update your speaker’s pre-installed software by using the following methods.
By updating the software, new features will be added enabling you to experience more convenient and stable use.
- Connect the speaker to an AC outlet via a USB AC adaptor (commercially available), or connected to a booted computer.
Software updates cannot be performed when using with the built-in battery. Update the software after completing charging.
- Turn on the speaker.
The
(power) indicator lights up in white*.* Depending on the Sound Mode, the color of the
(power) indicator varies. For details, refer to the following topic.
About the indicators
- Tap [Music Center] on your smartphone, iPhone, etc. to start up the application.
Music Center
-
Tap [SRS-XB21].
When a new version of the software is released, an update notice is displayed on the “Sony | Music Center” screen.
-
Follow the instructions on the screen to update.
In each update, the
(power) indicator flashes in green 5 times, then 4 times, 3 times, twice, once, and turns off. Depending on the situation, you may not be able to see all flashing patterns.When the speaker turns on for the first time after the software update, the
(power) and 
indicators flash 3 times to inform you that the update has completed.
