How Text to Audio softwares works -

i want create software can convert readable-texts(non-english) audio sound output.

after searches have realized of existing audio readers robotic , lacks human-speech effects.

i looking algorithm/paper-work, can give me idea on how proceed/implement such thing.

or

does know, how of world's best text-reader software works?

my expectation are:

1. reduced robotic-like sound, , more of human-like sound

2. high quality output

3. light weight, yet fast process speed

   **please edit question, if thinks points missing on aspect.

some small steps might give basic idea of happens-

1. you need create dictionary of words, each word name , sound.
2. create own signal processor, add effects sound, might want robotic, or female version or else.
3. parse text file want read in array formats, dividing each word , punctuations, form array and. eg. "i want die, isn't correct way live." form array {i:want:to:die:,:this:isn't:a:correct:way:to:live:.}
4. use punctuation implement life parameters , small pause , . longer pauses in audio reader.
5. use words take out audio database(dictionary) list in point 1.
6. play whole array continuously pause between each array element, work similar spaces

i think these major ways this. make faster can use advanced sound processing tools, cache small sound data , add data on fly while modulating sound signals.

might you.