For some reason the above picture of the MiniDAC analysis in conjunction with to too low output missed the tail of the note after the plugin. Went back and checked for the tracks levels, which were found to be equally set. Maybe this has to do with software. The other other two tracks are set to 0 dB and -0,1 dB the Minis track is on +3,9. Maybe the software in the plugins processing gets unlinear with rising volume slider? Or i. i. c...........?
Made another pic, so that we can see the notes tail now. As you will note it needed another 4 dB.