Volume control output

Hey partners,

does anybody know of there is a possebility to adjust the volume of the output from Maschine without influence the DB ?

Seems that i bought a Audio Interface with no knob to control the master/monitor out volume, yeah they do excist LOL (not really happy btw)

I got a Roland that came with Sonar Cakewalk, and the only way to adjust the volume of youre speakers (without it having impact on the DB -recording- ) is to do it inside Sonar....

I've had contact with Roland but they dont know anything about Maschine software so i hope somebody here knows the answer to my problem.

I know you can adjust it in Windows, but thats not if you use the ASIO driver, (so not with a low latency....)

Roland UA-33 Tri-Capture.

ps, i wish i never sold the Focusrite! damn :@