I installed Ubuntu 22.04.1 on my iMac. I can control PC audio from the keyboard, but not Chrome audio. To raise or lower the audio of Chrome I have to go to settings->audio and adjust it from there: if I set the audio of Chrome to 25% and press the Audio + button on the keyboard to the maximum, the volume of Chrome always remains to 25%. I'd like to control Chrome's audio through the keyboard, but I don't know how. I search online, but I can't find anything like this.How can I solve it?
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