Can a system update kill volume?

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http://forums.androidcentral.com – I have a HP slate 7 (I know, please don't say it). Receiving a Google system update a couple of days ago*, I updated. Since that day the maximum volume seems to have been lowered and is now virtually inaudible outdoors. Is the update the cause? Are there any other suggestions? I didn't (knowingly) download or update anything else. Finally, is there a way to change it, remove the update or increase available headphone volume? Thanks. Posted via Android Central App (HowTos)