[Speex-dev] how i can use agc function

[cat tanger]

hi, 
  1. I usr speex wb ,and find voice volume too small , my setting is :
  st->agc_enabled = 1;
st->agc_level = 8000;
  I feel the agc function not work,how can i enhance the volume.
   
  2. I test encode with 16.8K WB mode  and decode with 23.8 WB mode,  and find voice not good!  with continues electric current sound . why?
   
  please help me. 
  thanks a lot.
  tanger.
   

       
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