The low sound is only apparent when recording with ffmpeg ....... all apps play with good sound levels.
When playing back the recorded file the sound level in some of the apps could be raised sufficiently to hear ..... but anything else making a sound at that time would likely blow the speakers.
It is the recorded file that has the low volume .
I am pleased that I can record any screen video on this rig ....... there is a temporary graphics card in there and it is useless - RV380 [Radeon X600 (PCIE)]
Trying to play any HD video or such is pointless ...... the CPU falls over with the load
I had reduced the FPS to try to take a load off when recording.
Thanks for the two suggestions for the command.
I will try them soon ... maybe if I get a graphics card for this .......