I just tried the Beovox-CX100-V1.xml-profile and there the volume-control seems to work.
On the CX100-profile and with the ALSA-Volume (in Hifiberry-plugin-menu) set to 5, i am able to minimize the volume of the Logitech Media Server that far, that absolutely nothing can be heard from the speakers.
On the basic-fullrange.xml and ALSA even on 1 i also had the volume of LMS turned all the way down, but it still was very very loud. So maybe there the volume-control doesn’t have any effect at all?
Will there be an update for the basic-fullrange-profile? With this speakers i am only using 2 channels of the beocreate, so the cx-profile doesn’t match at all.