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src/tempo/beattracking.c: improve comments, remove old ones

--- a/src/tempo/beattracking.c

+++ b/src/tempo/beattracking.c

@@ -300,11 +300,7 @@

   fvec_t *acfout = bt->acfout;

   if (gp) {

-    // doshiftfbank again only if context dependent model is in operation

-    //acfout = doshiftfbank(acf,gwv,timesig,laglen,acfout); 

-    //don't need acfout now, so can reuse vector

-    // gwv is, in first loop, definitely all zeros, but will have

-    // proper values when context dependent model is activated

+    // compute shift invariant comb filterbank

     fvec_zeros (acfout);

     for (i = 1; i < laglen - 1; i++) {

       for (a = 1; a <= bt->timesig; a++) {

@@ -313,12 +309,9 @@

         }

       }

     }

+    // since gp is set, gwv has been computed in previous checkstate

     fvec_weight (acfout, bt->gwv);

     gp = fvec_quadratic_peak_pos (acfout, fvec_max_elem (acfout));

-    /*

-       while(gp<32) gp =gp*2;

-       while(gp>64) gp = gp/2;

-     */

   } else {

     //still only using general model

     gp = 0;

-- 

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