Hello Herbert,
It's nice to have you with us Herbert, all the way from Macau. (I must admit, I had to look it up on Google).
You must be thinking we've all gone to sleep.

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I see you have your own blog people might like to visit
English U can use I noticed in the audio clip at
Improve Your Speaking Voice - 1st in a series you say that to improve your speaking voice you just need "awareness and practice". That's true for learning anything, isn't it?
I realise you have all sorts of technical expertise I don't have. I'm looking for audio and video recordings that I can use as a basis for interactive exercises. Would you be interested in collaborating?
All the best,
Glenys