diff --git a/cmProc4.c b/cmProc4.c
index c570ce8..2b31ac7 100644
--- a/cmProc4.c
+++ b/cmProc4.c
@@ -2363,7 +2363,8 @@ void cmScMatcherPrint( cmScMatcher* p )
   unsigned esli       = 0;
   unsigned i,j,k;
 
-  // get first/last scLocIdx from res[]
+  // get first/last scLocIdx from res[] - this is the range of
+  // score events that the score matcher has identified
   for(i=0; i<p->ri; ++i)
     if( p->res[i].locIdx != cmInvalidIdx )
     {
@@ -2382,15 +2383,16 @@ void cmScMatcherPrint( cmScMatcher* p )
     aan += lp->evtCnt;
   }
 
-  // allocate an array off 'aan' print records
+  // allocate an array of 'aan' print records
   cmScMatcherPrint_t* a  = cmMemAllocZ(cmScMatcherPrint_t,aan);
 
-  // fill a[] note and bar events from cmScoreLoc()
+  // fill the cmScMatcherPrint_t array with note and bar events from the score
   for(i=bsli; i<=esli; ++i)
   {
     unsigned      scLocIdx = i;
     cmScoreLoc_t* lp       = cmScoreLoc(p->mp->scH, scLocIdx );
 
+    // for each score event which occurs at this location
     for(j=0; j<lp->evtCnt; ++j)
     {
       assert( an < aan );
@@ -2400,6 +2402,7 @@ void cmScMatcherPrint( cmScMatcher* p )
 
       an += 1;
       
+      
       switch( ep->type )
       {
         case kBarEvtScId:
@@ -2420,6 +2423,12 @@ void cmScMatcherPrint( cmScMatcher* p )
 
   }
 
+  //
+  // a[an] now contains a record for each note and bar event in the
+  // time range associated with the score matcher's result array.
+  //
+
+
   // for each result record
   for(i=0; i<p->ri; ++i)
   {
@@ -2428,7 +2437,7 @@ void cmScMatcherPrint( cmScMatcher* p )
     // if this result recd matched a score event
     if( cmIsFlag(rp->flags,kSmTruePosFl) )
     {
-      // locate the matching score event
+      // locate the matching score event in a[an]
       for(k=0; k<an; ++k)
         if( a[k].scLocIdx==p->mp->loc[rp->locIdx].scLocIdx && a[k].pitch==rp->pitch )
         {
@@ -2512,6 +2521,9 @@ void cmScMatcherPrint( cmScMatcher* p )
     }
   }
   
+  printf("sloc bar  mni  ptch flag\n");
+  printf("---- ---- ---- ---- ----\n");
+
   for(i=0; i<an; ++i)
   {
     printf("%4i %4i %4i %4s %c%c%c\n",a[i].scLocIdx,a[i].barNumb,a[i].mni,
diff --git a/cmProc4.h b/cmProc4.h
index 22f165f..3731083 100644
--- a/cmProc4.h
+++ b/cmProc4.h
@@ -244,7 +244,7 @@ extern "C" {
   // Score location record. 
   typedef struct
   {
-    unsigned        evtCnt;       // 
+    unsigned        evtCnt;       // count of score events at this location (i.e. a chord will have more than one event at a given location)
     cmScMatchEvt_t* evtV;         // evtV[evtCnt]
     unsigned        scLocIdx;     // scH score location index
     int             barNumb;      // bar number of this location
@@ -312,13 +312,13 @@ extern "C" {
 
   typedef struct
   {
-    unsigned locIdx;
-    unsigned scEvtIdx;
-    unsigned mni;
-    unsigned smpIdx;
-    unsigned pitch;
-    unsigned vel;
-    unsigned flags;
+    unsigned locIdx;    // index into cmScMatch_t.loc[]
+    unsigned scEvtIdx;  // score event index 
+    unsigned mni;       // index of the performed MIDI event associated with this score location
+    unsigned smpIdx;    // sample time index of performed MIDI event
+    unsigned pitch;     // performed pitch 
+    unsigned vel;       // performed velocity
+    unsigned flags;     // smTruePosFl | smFalsePosFl 
   } cmScMatcherResult_t;
 
   struct cmScMatcher_str;
@@ -380,7 +380,7 @@ extern "C" {
   cmRC_t       cmScMatcherReset( cmScMatcher* p, unsigned scLocIdx );
 
   // Slide a score window 'hopCnt' times, beginning at 'bli' (an
-  // index int p->mp->loc[]) looking for the best match to p->midiBuf[].  
+  // index into p->mp->loc[]) looking for the best match to p->midiBuf[].  
   // The score window contain scWndN (p->mp->mcn-1) score locations.
   // Returns the index into p->mp->loc[] of the start of the best
   // match score window. The score associated