In 683/685 the scene parameters are assignable.. but in 585 it is not.. only input.. output.. sound program.. enhancer.. these things are associated with each scene.. not volume :'(
Yes.. volume trim I have already done.. upto +6db max for each source it supports.. even after that the STB volume is very low.. Turning up the master volume of STB to max has helped a bit.. now at -20db I can listen properly.. still for other sources -35 or -40db will do..I think problem is with cable operator only.. also the stb is HD but doesn't support dolby audio.. so I have called up the guys.. and they said they will give me a dolby supporting STB..