diff --git a/static/qrplay/v2a.html b/static/qrplay/v2a.html
index 4e86edb..44b3ad1 100644
--- a/static/qrplay/v2a.html
+++ b/static/qrplay/v2a.html
@@ -26,6 +26,13 @@ r=.4;		// speed in s/beat
 l=1;		// note length in beats
 T=[];		// elapsed beats per channel
 v=f.value;	// input text
+s=A.sampleRate;
+W=A.createBuffer(1,2*s,s);
+for(i=0;i++<2*s;W.getChannelData(0)[i]=Math.random()*3-1);
+w=A.createBufferSource();
+w.buffer=W;
+w.loop=true;
+w.connect(B);
 for(
 	i=o=k=t=Z=0;
 	// loop over input, look ahead one character for sharp/flat
@@ -33,14 +40,13 @@ for(
 	c=v[i++],d=v[i],c;
 
 	z<0?0:		// unknown character, ignore
-	z>29?k=1:	// start of comment. P, O, V, U, K, R, not implemented.
-	z>28?k=0:	// end of comment
+	!z?(o=0,l=1/8):	// @ reset
+	z<3?o+=g:   // -+ change octave
+	z>28?k=z-29:// start or end of comment. POVUKR multi-character codes not implemented.
 	k?0: 		// middle of comment
 	z>27?(T[Z]=t,Z=+v.slice(i,i+=2),t=T[Z]||0):	// change channel
-	z>17?t+=l:	// rest
-	z<3?
-		z?o+=g:	// -+ change octave
-		(o=0,l=1/8):		// @ reset
+	z>18?(w.start(t*r),t+=l,w.stop(t*r)):
+	z>17?t+=l:	// rest. 012456789 percussion not implemented.
 	z&1?l=g:	// change note length
 	(	// play note
 		a=new OscillatorNode(A,{