diff --git a/static/qrplay/v3b.html b/static/qrplay/v3b.html
index 297286b..fafc410 100644
--- a/static/qrplay/v3b.html
+++ b/static/qrplay/v3b.html
@@ -49,7 +49,7 @@ C=[
 	'-ffed#ddc#',
 	'dddddd#e',
 	'--ba#bb-a+a#-b'
-].map(c=>`{o06m${c}}x`);
+].map(c=>`{@++m${c}}x`);
 
 // main loop
 M=_=>{
@@ -57,7 +57,7 @@ M=_=>{
 	// next index into S
 	s=1;
 	// opcode
-	z='\n;+-@.3cdefgabx012456789jtsiqhwmuvo{}'.indexOf(a);
+	z='\n;+-@.3cdefgabx012456789jtsiqhwmuv{}'.indexOf(a);
 
 	// no match
 	z<0?0:
@@ -104,10 +104,8 @@ M=_=>{
 	z<33?(U=b+c+d,s+=3):
 	// change volume
 	z<34?(V=b+c,s+=2):
-	// change octave
-	z<35?(O=b+c-4,s+=2):
 	// play simultaneously
-	z<36?B[Z++]={L,O,T,U,V}:
+	z<35?B[Z++]={L,O,T,U,V}:
 	{L,O,T,U,V}=B[--Z];
 	
 	// loop