Set Maximum Volume...?

Howdy,

Is there a way to set the maximum volume from my speakers
via software?

Specifically:

I know how to modify the volume, but if the system reboots,
it seems to go to maximum again.

Then, if my son cranks up the knob on the speakers, he can
make things blast.

I would like a durable setting that would prevent that.

Is there a way?

Sincere thanks (and please don't mention this to my son...),
--
Kenneth

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