Volume levels across inputs

I have just received a new Mu-So and additional results are excellent . I will be using the unit mainly for music streaming or I radio all of which work vey well. I have also connected the unit to a Samsung TV via an optical cable but have to turn the volume up considerably to get a reasonable sound level. I understand why this is and the Mu So is not designed principally as  a sound bar. My issue is that when I revert back to music streaming or radio the volume level is way too high. I have already reduced the maximum level on the app to the lowest level for the tv. Is there any way to set individual maximum volumes for inputs individually. I am trying to force myself to lower the volume every time  come off the tv but keep forgetting. Is this a possible update.