diff --git a/src/samplesrc/dcgrrgb.pla b/src/samplesrc/dcgrrgb.pla
index e9194e6..40619b8 100644
--- a/src/samplesrc/dcgrrgb.pla
+++ b/src/samplesrc/dcgrrgb.pla
@@ -49,6 +49,7 @@ def rgbpix(r, g, b, x, y)#0
   var zdist, cdist
   byte i
 
+  // Error propogation
   //r = r - er/4
   //g = g - eg/4
   //b = b - eb/4
@@ -87,7 +88,7 @@ def rgbpix(r, g, b, x, y)#0
   //puts("Dist to Zero (Black):"); puti(zdist); putln
   //puts("Dist to Chroma Color:"); puti(cdist); putln
   if cdist < zdist
-    // RGB closer to Chroma Color
+    // RGB closer to chroma color
     er = dr
     eg = dg
     eb = db
@@ -96,7 +97,7 @@ def rgbpix(r, g, b, x, y)#0
     ntscCycle[i+BLU] = ntscChroma[i+BLU]
     dhgrSet(x, y)
   else
-    // RGB closer to Black
+    // RGB closer to black
     ntscCycle[i+RED] = 0
     ntscCycle[i+GRN] = 0
     ntscCycle[i+BLU] = 0