Settings question

[Temagami]

Y'know when you navigate through the box (search, select a show etc.) it makes a "breep" sound on every click.  How do I turn that sound off? - It's driving the wife batty
I thought it would be in the settings but I can't find it (I'm probably looking right at it.)  I have the buzz 4000 box - I really like it!!

[dishuser]

settings/device preferences/sound

[Temagami]

Ahhh It's "System" sounds - I thought that would turn off the sound to the whole system.

I was looking for "Navigation" sounds.

 

Thanks!!