KMix not controlling volume / Konsole not beeping (MX-18 Linux)

Hi All, - TDE - MX-18 Linux (Debian 9 "stretch") - GTX 1060 (NVidia) - ASUS monitor (VP228he), connected through HDMI Ref: https://forum.mxlinux.org/viewtopic.php?t=48235 I finally got sounds working but... - The applet KMix doesn’t change the volume no matter which option I select within it. - Konsole will play a test sound for the ‘Bell emitted within a visible session’ but it doesn’t play the sound (or any other it seems) when it should (e.g. hit ‘Backspace’ at empty prompt). - When TCC restarts the sound server all 'The Window Manager' sounds no longer work. 'The Window Manager' sounds seem to be coming from the MX’s Settings Manager>System Sounds not TDE. [1] Based upon the last item, I’m guessing TDE and MX are fighting over who’s managing sound? Just a guess, but does anyone have a hint on what to look at to get TDE back in control? The ‘Ref:’ above has ‘aplay -l’ and other details. Thanks, Michael [1] https://forum.mxlinux.org/viewtopic.php?f=104&t=48790