Windows Teamviewer Registry Keys and Values

Hello,

Can someone assist me by telling me what the regestries below used for, and what does the value for the registries inputted below mean?

hkey_users\c__users_username_ntuser.dat\software\teamviewer\multimedia\audiosendingvolume
Value 0.70

hkey_users\c__users_username_ntuser.dat\software\teamviewer\multimedia\audiorenderingpathvolume
Value 0.50

Much appreciated