anchor.diff:  x,x,vl velar fricative
   ɣ,G,vd velar fricative
   χ,X,vl uvular fricative
  -ʁ,R\,vd uvular fricative
  +ʁ,R,vd uvular fricative
   ħ,X\,vl pharyngeal fricative
   ʕ,?\,vd pharyngeal fricative
   h,h,vl glottal fricative
  
positive.code: æ,{,mid-open front unrounded vowel
  ɐ,6,open-mid schwa
  a,a,open front unrounded
  ɶ,&,front open rounded
  ɑ,A,open back unrounded
  ɒ,Q,open back rounded
  
negative.code: ɫ,5,velarized vl alveolar lateral
  ʄ,J\_<,vl palatal implosive
  ʼ,_>,ejective
  ɝ,3`,rhotacized open-mid central
  t͡ʃ,tS,vl postalveolar affricate
  d͡ʒ,dZ,vd postalveolar affricate
  t͡ɕ,ts\,vl alveolo-palatal affricate
  d͡ʑ,dz\,vd alveolo-palatal affricate
  t͡ɬ,tK,vl alveolar lateral affricate
  k͡p,kp,vl labial-velar plosive
  g͡b,gb,vd labial-velar plosive
  ŋ͡m,Nm,labial-velar nasal stop
  ʈ͡ʂ,ts`,vl retroflex affricate
  ɖ͡ʐ,tz`,vd retroflex affricate
  ˩,_B,extra low tone
  ˨,_L,low tone
  ˧,_M,mid tone 
  