When initially opened, you'll be asked to 'set a device'... You will want 'line in" rather than "stereo mixer".
— Using the stereo mixer MAY cause sound issues if the DSP PlugIn (below) is activated.
The 'input' volume will initially Input Volume setting of the Sound Card,

Make sure you follow the RED Stars.. as indicated... NOTE Information here will apply to ALL stream mount points

gain, exact match with RED Star indicators... Save it.
If you want to point to more than one server,
go back to 'main' and simply add as many server connections as you desire.