Default [Q]Google voice search prompts do not obey volume sliders

On a Bluetooth headset Google (voice) search prompt tones are intolerably loud. I use Persist+ & with all sliders @ zero, it just does its own loud prompt.
Is there a solution? Google Search v3.1.24+ the last 2 versions do the same thing on my Moto X 4.4.2.
My workaround is to disable it & let Voice Search 2.1.4 handle voice dialing.
Frustrated & not rooted!
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