Still searching how to do properly text decoding

Synth seems better. Didn't make the oscillator start and stop because of
<https://github.com/WebAudio/web-audio-api/blob/f831b2ce58b00a32fc5761d8dd6f2041683fc1c6/index.html#L1945-L1946>
;)
Remove useless fundation clean a little bit code