1. Fixed a grouping issue with other Chromecast built-in speakers (read below):
   1. 3rd party Chromecast built-in speakers using a Google SDK less than 1.52GM2 can not be grouped with 1st party Google speakers any longer. This update brings the Bar 9.1 up to 1.52GM2, which means once again, it can be grouped with 1st party Google speakers
2. Software update resolves the issues with the "Google Home" app if you are using an Android phone (read below):
   1. Speakers with an SDK less than 1.52GM2 set up with a Google Pixel phone need to use a new, additional app called the "Device Utility app" to complete the Wi-Fi setup. After this update, customers may use the Google Home app as normal for Wi-Fi setup
3. General software and performance improvements:
   1. Sometimes there was a 0.5sec audio drop during ARC streaming with PCM format, now improved!
   2. Import MTK patch to solve continuous distortion after connecting Apple TV to a Sony TV while playing PCM stream in eARC source.

• Improves Soundbar Optical, HDMI, and ARC Compatibility with TV.
• Improves Bluetooth connectivity for mobile devices.
• Improved LED Display Messages.
• Bug fix to remove detachable speakers battery level checking due to imprecise readings.

Prerequisites:
− Make sure that your room is quiet;
− Make sure that the soundbar and the two detachable rear speakers are fully in sight of each other, without obstacles in between.
− Make sure that the left and right rear speakers are properly placed, the L speaker on the left and the R speaker on the right.

The calibration is done in two steps: Listening zone & Speaker position

Calibrate the listening zone

1. Place the detachable rear speakers beside your seating position.

2. On the remote control, press and hold HDMI until “1-CALIBRATION” is displayed on the soundbar.
→ Countdown starts from 5 to 1.
→ Calibration tone is heard. Audio calibration starts.
→ “CALIBRATING”: Calibration ongoing.
→ “1-DONE”: Calibration of the listening zone is completed successfully.

Calibrate the speaker position

1. Place the detachable rear speakers in your desired location.

2. On the remote control, press and hold HDMI until “2-CALIBRATION” is displayed on the soundbar.
→ Countdown starts from 5 to 1.
→ Calibration tone is heard. Audio calibration starts.
→ “CALIBRATING”: Calibration ongoing.
→ “2-DONE”: Calibration of the speaker position is completed successfully.
3. To select suitable surround sound level, press repeatedly to switch between high, low or middle (default).

NOTES:
− During calibration, all buttons on the remote control are disabled except for STANDBY and HDMI.
− “SETUP FAILED” is displayed if calibration failed.

The Checklist

Let us walk-through a list of things needed to ensure every requirement is met.

1. Check your mobile device if that is able to connect to same Wireless network.
2. Make sure you are within range of your Wireless router.
3. Check the Wireless signal on your mobile device, does it have a weak signal then move closer to the router.
4. Try both Wireless network bands 2.4GHz and 5GHz in case one of them are failing.
   1. You will have longer range with 2.4GHz, but less performance and most of the times a crowded network (many devices are using 2.4GHz band).
   2. You will have less interference with 5GHz and higher performance, however, the range of the 5GHz network has shorter range.
5. Try using a different mobile device, if you have one.
6. Reboot your Wireless network router and your mobile device.

Wireless Network Extender

Some houses or apartments can be too big for one Wireless network router to cover it all.
Let's talk about the issues that might appear with an Extender network.

1. Network Extenders that will help cover poor signal in your home, often results in poor connection and low speed performance.
2. Often the Network Extender is a low budget device or not suited for having too many devices attached to it.
3. Placement of the speaker is crucial as you can put it in a place where it could connect to either main Wireless router or the Extender, that will confuse Wireless network devices.
4. To solve this issue, try move the speaker closer to main router or have fewer devices attached to your Wireless Extender.
5. In addition, always use 5GHz connection between your Network extender and main router (best solution and performance).

One Wireless Network Name (SSID)

1. You may have set the Wireless Network SSID (Wi-Fi network name) to one big Wireless network (With a main router + Extender(s).
2. If the speaker is within range of both Wireless networks (Main router & Extender) then it can get confused with which one to connect to.
3. To solve this issue, using two different name for your extended network will help with the performance of the Speaker and Google Assistant request.

If you find yourself encountering audio dropouts or interference coming from your surround speakers when they are not docked on the main unit, here are a couple of tips to try to remedy that.

1. Try moving any wireless routers that are near the sound bar further away.

2. Reboot router so it can auto select a new frequency channel, since the sound bar and router may be on the same channel resulting in audible interferences

3. Re-position the surround speakers so they are closer to the main unit.

4. Re-calibrate the surround speakers

5. Adjust the volume on the sound bar and gradually raise the volume, if driven to hard the sound bar speakers can distort