There was a Google Home update and your phone’s volume button no longer works when you open this app. So you can no longer use the physical buttons on your phone to raise or lower the volume. This is not a mistake, it is a conscious choice.
Google Home app
Google has Thursday advertisement About the change to the Google Home app: “Due to a recent legal decision, we are making some changes to the way you set up your devices and the speaker group functionality will work from now on. If you use the Speaker Group feature to control the volume in the Google Home app, or With your voice using Google Assistant, or directly on the Nest Hub screen, you’ll notice some changes.”
One such change is that you can no longer use the physical volume knob. This is because now you can not adjust the volume of the groups of speakers at once, but for each speaker separately. You can’t change it later with this physical button either. So it’s not a post-update error, but a legal modification that Google must implement. That legal battle comes from Sonos.
Below you can see an example of this (via 9to5Google):
You now rely on the in-app digital volume buttons, which you use, for example, in the media screen that you find when using the green shortcut at the top of the home app. Sometimes this can cause problems between young people and their parents, because if you live in the same house, you are using the same speakers inside the Google Home. If someone adjusts the sound to the noise of the neighbors, you can’t adjust that as quickly in the app as before.
Nosy? If you have Google Home 220.127.116.11, you will notice that the volume button no longer does what it did before. This update is available for Android 11 and Android 12.
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