diff --git a/.gitignore b/.gitignore
index 6bed399..64230d5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,6 @@
 *.bak
 /*-test
 /screenshot-*.bmp
+
 *snarf
+*theme
diff --git a/projects/examples/demos/musictracker.tal b/projects/examples/demos/musictracker.tal
deleted file mode 100644
index 0aa9bd3..0000000
--- a/projects/examples/demos/musictracker.tal
+++ /dev/null
@@ -1,659 +0,0 @@
-( mini music tracker )
-
-%RTN { JMP2r }
-%8++ { #0008 ADD2 } %8-- { #0008 SUB2 }
-%8** { #30 SFT2 }   %8// { #03 SFT2 }
-%++ { #0001 ADD2 }  %2// { #01 SFT2 }
-%MOD8 { #07 AND }
-%TRACK { ;track/ch1 #00 .track/active LDZ #50 SFT2 ADD2 }
-
-( variables )
-
-@pointer [ &x $2 &y $2 ]
-@color [ &byte $1 ]
-@rect [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@trkframe [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@chnframe [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@ctlframe [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@label [ &x $2 &y $2 &color $1 &addr $2 ]
-@knob [ &x $2 &y $2 &value $1 ]
-@head [ &pos $1 ]
-@track [ &active $1 &ch1 $20 &ch2 $20 &ch3 $20 &ch4 $20 ]
-
-( devices )
-
-|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 ]
-|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 &error $1 ]
-|20 @Screen [ &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1 ]
-|30 @Audio0 [ &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &len $2 &addr $2 &volume $1 &pitch $1 ]
-|40 @Audio1 [ &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &len $2 &addr $2 &volume $1 &pitch $1 ]
-|50 @Audio2 [ &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &len $2 &addr $2 &volume $1 &pitch $1 ]
-|60 @Audio3 [ &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &len $2 &addr $2 &volume $1 &pitch $1 ]
-|80 @Controller [ &vector $2 &button $1 &key $1 ]
-|90 @Mouse [ &vector $2 &x $2 &y $2 &state $1 &wheel $1 ]
-|a0 @File [ &vector $2 &success $2 &offset $2 &pad $2 &name $2 &length $2 &load $2 &save $2 ]
-
-( vectors )
-
-|0100
-	@noise-wave
-
-	( theme ) #e0fa .System/r DEO2 #30fa .System/g DEO2 #30fa .System/b DEO2
-	( vectors ) ;on-screen .Screen/vector DEO2
-	( vectors ) ;on-mouse .Mouse/vector DEO2
-	( vectors ) ;on-button .Controller/vector DEO2
-
-	.Screen/width DEI2 2// DUP2 #0080 SUB2 .trkframe/x1 STZ2
-	 #0080 ADD2 .trkframe/x2 STZ2
-	.Screen/height DEI2 2// DUP2 #0038 SUB2 #0010 SUB2 .trkframe/y1 STZ2
-	 #0038 ADD2 #0010 SUB2 .trkframe/y2 STZ2
-
-	.trkframe/x1 LDZ2 .chnframe/x1 STZ2 .trkframe/y2 LDZ2 .chnframe/y1 STZ2
-	.chnframe/x1 LDZ2 #0030 ADD2 .chnframe/x2 STZ2 .chnframe/y1 LDZ2 #0030 ADD2 .chnframe/y2 STZ2
-
-	.chnframe/x2 LDZ2 .ctlframe/x1 STZ2 .chnframe/y1 LDZ2 .ctlframe/y1 STZ2
-	.trkframe/x2 LDZ2 .ctlframe/x2 STZ2 .chnframe/y2 LDZ2 .ctlframe/y2 STZ2
-
-	( default settings )
-	#048c .Audio0/adsr DEO2 #88 .Audio0/volume DEO
-	#159d .Audio1/adsr DEO2 #88 .Audio1/volume DEO
-	#26ae .Audio2/adsr DEO2 #88 .Audio2/volume DEO
-	#0000 .Audio3/adsr DEO2 #88 .Audio3/volume DEO
-
-	;square-wave .Audio0/addr DEO2
-	;square-wave/end ;square-wave SUB2 .Audio0/len DEO2
-	;on-square-done .Audio0/vector DEO2
-	;triangle-wave .Audio1/addr DEO2
-	;triangle-wave/end ;triangle-wave SUB2 .Audio1/len DEO2
-	;on-triangle-done .Audio1/vector DEO2
-	;sine-wave .Audio2/addr DEO2
-	;sine-wave/end ;sine-wave SUB2 .Audio2/len DEO2
-	;on-sine-done .Audio2/vector DEO2
-	;noise-wave .Audio3/addr DEO2
-	;noise-wave-end ;noise-wave SUB2 .Audio3/len DEO2
-	;on-noise-done .Audio3/vector DEO2
-
-	;draw-timeline JSR2
-	;draw-controls JSR2
-	;draw-channels JSR2
-
-BRK
-
-@on-screen ( -> )
-	
-	;move-head JSR2
-	;draw-vu JSR2
-	.head/pos LDZ MOD8 ,&skip JCN
-		;bang JSR2
-	&skip
-
-BRK
-
-@on-mouse ( -> )
-
-	.Mouse/state DEI #00 EQU ;&click-end JCN2
-		.Mouse/x DEI2 .trkframe/x1 LDZ2 GTH2 .Mouse/x DEI2 .trkframe/x2 LDZ2 LTH2 #0101 EQU2
-		.Mouse/y DEI2 .trkframe/y1 LDZ2 GTH2 .Mouse/y DEI2 .trkframe/y2 LDZ2 LTH2 #0101 EQU2
-		#0101 EQU2 ;touch-trk JCN2
-		.Mouse/x DEI2 .chnframe/x1 LDZ2 GTH2 .Mouse/x DEI2 .chnframe/x2 LDZ2 LTH2 #0101 EQU2
-		.Mouse/y DEI2 .chnframe/y1 LDZ2 8++ GTH2 .Mouse/y DEI2 .chnframe/y2 LDZ2 8-- LTH2 #0101 EQU2
-		#0101 EQU2 ;touch-chn JCN2
-		.Mouse/x DEI2 .ctlframe/x1 LDZ2 GTH2 .Mouse/x DEI2 .ctlframe/x2 LDZ2 LTH2 #0101 EQU2
-		.Mouse/y DEI2 .ctlframe/y1 LDZ2 8++ GTH2 .Mouse/y DEI2 .ctlframe/y2 LDZ2 8-- LTH2 #0101 EQU2
-		#0101 EQU2 ;touch-ctl JCN2	
-	&click-end
-
-	;draw-cursor JSR2
-
-BRK
-
-@on-button ( -> )
-
-	.Controller/key DEI
-	DUP #61 NEQ ,&no-c JCN
-		;notes LDA ;play JSR2 &no-c
-	DUP #73 NEQ ,&no-d JCN
-		;notes #0001 ADD2 LDA ;play JSR2 &no-d
-	DUP #64 NEQ ,&no-e JCN
-		;notes #0002 ADD2 LDA ;play JSR2 &no-e
-	DUP #66 NEQ ,&no-f JCN
-		;notes #0003 ADD2 LDA ;play JSR2 &no-f
-	DUP #67 NEQ ,&no-g JCN
-		;notes #0004 ADD2 LDA ;play JSR2 &no-g
-	DUP #68 NEQ ,&no-a JCN
-		;notes #0005 ADD2 LDA ;play JSR2 &no-a
-	DUP #6a NEQ ,&no-b JCN
-		;notes #0006 ADD2 LDA ;play JSR2 &no-b
-	DUP #6b NEQ ,&no-c2 JCN
-		;notes #0007 ADD2 LDA ;play JSR2 &no-c2
-	POP
-
-BRK
-
-@on-square-done ( -> )
-	LIT '0 .Console/write DEO
-	BRK
-
-@on-triangle-done ( -> )
-	LIT '1 .Console/write DEO
-	BRK
-
-@on-sine-done ( -> )
-	LIT '2 .Console/write DEO
-	BRK
-
-@on-noise-done ( -> )
-	LIT '3 .Console/write DEO
-	BRK
-
-@play ( pitch -- )
-
-	.Audio0/pitch DEO
-
-RTN
-
-@touch-trk ( -- )
-	
-	;clear-notes JSR2
-	( get note )
-	#0e .Mouse/y DEI2 .trkframe/y1 LDZ2 SUB2 NIP #08 DIV SUB
-	.Mouse/state DEI #10 NEQ ,&no-erase JCN POP #00 &no-erase
-	( edit note )
-	TRACK #00 .Mouse/x DEI2 .trkframe/x1 LDZ2 SUB2 NIP #08 DIV ADD2 STA
-	( release ) #00 .Mouse/state DEO
-	;draw-notes JSR2
-
-BRK
-
-@touch-chn ( -- )
-	
-	;clear-notes JSR2
-	( save ) .Mouse/y DEI2 .chnframe/y1 LDZ2 SUB2 NIP #08 DIV #01 SUB .track/active STZ
-	( release ) #00 .Mouse/state DEO
-	;draw-channels JSR2
-	;draw-notes JSR2
-	;draw-controls JSR2
-
-BRK
-
-@touch-ctl ( -- )
-	
-	.Mouse/x DEI2 .ctlframe/x1 LDZ2 SUB2 8-- 8// NIP #02 DIV
-	DUP ,&no-a JCN
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEI
-		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEO &no-a
-	DUP #01 NEQ ,&no-d JCN
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEI
-		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEO &no-d
-	DUP #02 NEQ ,&no-s JCN
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEI
-		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEO &no-s
-	DUP #03 NEQ ,&no-r JCN
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEI
-		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEO &no-r
-	DUP #05 NEQ ,&no-left JCN
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEI
-		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEO &no-left
-	DUP #06 NEQ ,&no-right JCN
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEI
-		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEO &no-right
-	POP
-	( release ) #00 .Mouse/state DEO
-	;draw-controls JSR2
-
-BRK
-
-@bang ( -- )
-		
-	;track/ch1 #00 .head/pos LDZ #08 DIV ADD2 LDA
-	#01 SUB
-	DUP #ff NEQ ,&skip1 JCN
-		POP ,&listen2 JMP
-	&skip1
-	#00 SWP ;notes ADD2 LDA .Audio0/pitch DEO
-	&listen2
-	;track/ch2 #00 .head/pos LDZ #08 DIV ADD2 LDA
-	#01 SUB
-	DUP #ff NEQ ,&skip2 JCN
-		POP ,&listen3 JMP
-	&skip2
-	#00 SWP ;notes ADD2 LDA .Audio1/pitch DEO
-	&listen3
-	;track/ch3 #00 .head/pos LDZ #08 DIV ADD2 LDA
-	#01 SUB
-	DUP #ff NEQ ,&skip3 JCN
-		POP ,&listen4 JMP
-	&skip3
-	#00 SWP ;notes ADD2 LDA .Audio2/pitch DEO
-	&listen4
-	;track/ch4 #00 .head/pos LDZ #08 DIV ADD2 LDA
-	#01 SUB
-	DUP #ff NEQ ,&skip4 JCN
-		POP ,&end JMP
-	&skip4
-	#00 SWP ;notes ADD2 LDA #80 ORA .Audio3/pitch DEO
-	&end
-
-RTN
-
-@move-head ( -- )
-
-	( clear )
-	.trkframe/y1 LDZ2 8-- .Screen/y DEO2
-	.trkframe/x1 LDZ2 #00 .head/pos LDZ ADD2 .Screen/x DEO2
-	;head_icn .Screen/addr DEO2
-	#00 .Screen/sprite DEO
-	( incr ) .head/pos LDZ #01 ADD .head/pos STZ
-	.trkframe/x1 LDZ2 #00 .head/pos LDZ ADD2 .Screen/x DEO2
-	;head_icn .Screen/addr DEO2
-	#01 ( if note ) TRACK #00 .head/pos LDZ #08 DIV ADD2 LDA #00 NEQ ADD .Screen/sprite DEO
-
-RTN
-
-@clear-notes ( -- )
-
-	#00 #20
-	&loop
-		( load ) OVR #00 SWP TRACK ADD2 LDA
-		DUP STH #00 SWP #0e SWP SUB 8** .trkframe/y1 LDZ2 ADD2 .Screen/y DEO2
-		OVR #00 SWP 8** .trkframe/x1 LDZ2 ADD2 .Screen/x DEO2
-		STHr #00 EQU ,&skip JCN
-			#00 .Screen/sprite DEO
-		&skip
-		( incr ) SWP #01 ADD SWP
-		DUP2 LTH ,&loop JCN
-	POP2
-
-RTN
-
-@draw-notes ( -- )
-
-	#00 #20
-	&notes-loop
-		( load ) OVR #00 SWP TRACK ADD2 LDA
-		DUP STH #00 SWP #0e SWP SUB 8** .trkframe/y1 LDZ2 ADD2 .Screen/y DEO2
-		OVR #00 SWP 8** .trkframe/x1 LDZ2 ADD2 .Screen/x DEO2
-		;note_icn .Screen/addr DEO2
-		STHr #00 EQU ,&skip JCN
-			#05 .Screen/sprite DEO
-		&skip
-		( incr ) SWP #01 ADD SWP
-		DUP2 LTH ,&notes-loop JCN
-	POP2
-	;draw-bars JSR2
-
-RTN
-
-@draw-bars ( -- )
-
-	.trkframe/x1 LDZ2 .trkframe/y1 LDZ2 .trkframe/x2 LDZ2 .trkframe/y2 LDZ2 #01 ;line-rect JSR2
-
-	( grid )
-	.trkframe/y1 LDZ2 #0010 SUB2 .Screen/y DEO2
-	;font_hex .Screen/addr DEO2
-	#0000 #0100
-	&loop
-		OVR2 NIP #02 DIV #0f AND ,&skip JCN
-			OVR2 .trkframe/x1 LDZ2 ADD2 .Screen/x DEO2
-			.trkframe/y1 LDZ2 #0010 SUB2 .Screen/y DEO2
-			#02 .Screen/sprite DEO
-			.Screen/addr DEI2 8++ .Screen/addr DEO2
-			OVR2 .trkframe/x1 LDZ2 ADD2 .trkframe/y1 LDZ2 ++ .trkframe/y2 LDZ2 #01 ;line-vertical-dotted JSR2
-		&skip
-		OVR2 .trkframe/x1 LDZ2 ADD2 .trkframe/y1 LDZ2 .trkframe/y2 LDZ2 #01 ;line-vertical-dotted JSR2
-		SWP2 8++ SWP2
-		OVR2 OVR2 LTH2 ,&loop JCN
-	POP2
-	POP2
-
-	.trkframe/x1 LDZ2 .trkframe/x2 LDZ2 .trkframe/y1 LDZ2 8-- #0040 ADD2 #01 ;line-horizontal-dotted JSR2
-
-RTN
-
-@draw-octave ( x y -- )
-
-	.Screen/y DEO2
-	.Screen/x DEO2
-	;octave_icn .Screen/addr DEO2
-	.Screen/y DEI2 .Screen/y DEI2 #0038 ADD2
-	&loop
-		OVR2 .Screen/y DEO2
-		#01 .Screen/sprite DEO
-		.Screen/addr DEI2 8++ .Screen/addr DEO2
-		.Screen/x DEI2 8++ .Screen/x DEO2
-		#01 .Screen/sprite DEO
-		.Screen/addr DEI2 8++ .Screen/addr DEO2
-		.Screen/x DEI2 8-- .Screen/x DEO2
-		SWP2 8++ SWP2
-		OVR2 OVR2 LTH2 ,&loop JCN
-	POP2
-	POP2
-
-RTN
-
-@draw-octaves ( -- )
-	
-	.trkframe/x1 LDZ2 #0018 SUB2 DUP2 .trkframe/y1 LDZ2 ;draw-octave JSR2
-	.trkframe/y1 LDZ2 #0038 ADD2 ;draw-octave JSR2
-	.trkframe/x1 LDZ2 #0028 SUB2 .Screen/x DEO2
-	.trkframe/y1 LDZ2 #0030 ADD2 .Screen/y DEO2
-	;font_hex #0020 ADD2 .Screen/addr DEO2
-	#03 .Screen/sprite DEO
-	.trkframe/x1 LDZ2 #0030 SUB2 .Screen/x DEO2
-	;font_hex #0060 ADD2 .Screen/addr DEO2
-	#03 .Screen/sprite DEO
-	.trkframe/x1 LDZ2 #0028 SUB2 .Screen/x DEO2
-	.trkframe/y1 LDZ2 #0068 ADD2 .Screen/y DEO2
-	;font_hex #0018 ADD2 .Screen/addr DEO2
-	#03 .Screen/sprite DEO
-	.trkframe/x1 LDZ2 #0030 SUB2 .Screen/x DEO2
-	;font_hex #0060 ADD2 .Screen/addr DEO2
-	#03 .Screen/sprite DEO
-
-RTN
-
-@draw-timeline ( -- )
-
-	;draw-bars JSR2
-	;draw-octaves JSR2
-
-RTN
-
-@draw-knob ( x* y* value -- )
-	.track/active LDZ #03 EQU ;&blank JCN2
-
-	&force
-	( load ) .knob/value STZ .knob/y STZ2 .knob/x STZ2
-
-	.knob/x LDZ2 .Screen/x DEO2
-	.knob/y LDZ2 .Screen/y DEO2 ;knob_icns .Screen/addr DEO2 #01 .Screen/sprite DEO
-	.knob/x LDZ2 8++ .Screen/x DEO2 ;knob_icns 8++ .Screen/addr DEO2 #01 .Screen/sprite DEO
-	.knob/y LDZ2 8++ .Screen/y DEO2 ;knob_icns #0018 ADD2 .Screen/addr DEO2 #01 .Screen/sprite DEO
-	.knob/x LDZ2 .Screen/x DEO2 ;knob_icns #0010 ADD2 .Screen/addr DEO2 #01 .Screen/sprite DEO
-	.knob/x LDZ2 #00 #00 .knob/value LDZ ;knob_offsetx ADD2 LDA ADD2 .Screen/x DEO2
-	.knob/y LDZ2 #00 #00 .knob/value LDZ ;knob_offsety ADD2 LDA ADD2 .Screen/y DEO2
-	;knob_icns #0020 ADD2 .Screen/addr DEO2
-	#05 .Screen/sprite DEO
-	.knob/x LDZ2 #0004 ADD2 .Screen/x DEO2
-	.knob/y LDZ2 #0010 ADD2 .Screen/y DEO2
-	;font_hex #00 .knob/value LDZ #30 SFT ADD2 .Screen/addr DEO2
-	#01 .Screen/sprite DEO
-
-RTN
-
-	&blank
-
-	( load ) .knob/value STZ .knob/y STZ2 .knob/x STZ2
-
-	.knob/x LDZ2 .Screen/x DEO2
-	.knob/y LDZ2 .Screen/y DEO2 #00 .Screen/sprite DEO
-	.knob/x LDZ2 8++ .Screen/x DEO2 #00 .Screen/sprite DEO
-	.knob/y LDZ2 8++ .Screen/y DEO2 #00 .Screen/sprite DEO
-	.knob/x LDZ2 .Screen/x DEO2 #00 .Screen/sprite DEO
-	.knob/x LDZ2 #0004 ADD2 .Screen/x DEO2
-	.knob/y LDZ2 #0010 ADD2 .Screen/y DEO2
-	#00 .Screen/sprite DEO
-RTN
-
-@draw-controls ( -- )
-	
-	.ctlframe/x1 LDZ2 .ctlframe/y1 LDZ2 .ctlframe/x2 LDZ2 .ctlframe/y2 LDZ2 #01 ;line-rect JSR2
-	( env )
-	.ctlframe/x1 LDZ2 8++ .ctlframe/y1 LDZ2 8++ #02 ;env_txt ;draw-label JSR2
-	.ctlframe/x1 LDZ2 8++ .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEI #04 SFT
-		;draw-knob JSR2
-	.ctlframe/x1 LDZ2 #0018 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/adsr .track/active LDZ #40 SFT ADD DEI #0f AND
-		;draw-knob JSR2
-	.ctlframe/x1 LDZ2 #0028 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEI #04 SFT
-		;draw-knob JSR2
-	.ctlframe/x1 LDZ2 #0038 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/adsr .track/active LDZ #40 SFT ADD #01 ADD DEI #0f AND
-		;draw-knob JSR2
-	( vol )
-	.ctlframe/x1 LDZ2 #0058 ADD2 .ctlframe/y1 LDZ2 8++ #02 ;vol_txt ;draw-label JSR2
-	.ctlframe/x1 LDZ2 #0058 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEI #04 SFT
-	;draw-knob/force JSR2
-	.ctlframe/x1 LDZ2 #0068 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/volume .track/active LDZ #40 SFT ADD DEI #0f AND
-	;draw-knob/force JSR2
-
-RTN
-
-@draw-vu ( -- )
-	.ctlframe/x1 LDZ2 #0088 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		.Audio0/output .track/active LDZ #40 SFT ADD DEI DUP STH #04 SFT
-	;draw-knob/force JSR2
-	.ctlframe/x1 LDZ2 #0098 ADD2 .ctlframe/y1 LDZ2 #0010 ADD2
-		STHr #0f AND
-	;draw-knob/force JSR2
-
-RTN
-
-@draw-channels
-	
-	.chnframe/x1 LDZ2 .chnframe/y1 LDZ2 .chnframe/x2 LDZ2 .chnframe/y2 LDZ2 #01 ;line-rect JSR2
-	.chnframe/x1 LDZ2 8++ .chnframe/y1 LDZ2 8++ #01 .track/active LDZ #00 EQU #07 MUL ADD ;ch1_txt ;draw-label JSR2
-	.chnframe/x1 LDZ2 8++ .chnframe/y1 LDZ2 #0010 ADD2 #01 .track/active LDZ #01 EQU #07 MUL ADD ;ch2_txt ;draw-label JSR2
-	.chnframe/x1 LDZ2 8++ .chnframe/y1 LDZ2 #0018 ADD2 #01 .track/active LDZ #02 EQU #07 MUL ADD ;ch3_txt ;draw-label JSR2
-	.chnframe/x1 LDZ2 8++ .chnframe/y1 LDZ2 #0020 ADD2 #01 .track/active LDZ #03 EQU #07 MUL ADD ;ch4_txt ;draw-label JSR2
-
-RTN
-
-@draw-cursor ( -- )
-
-	( clear last cursor )
-	;clear_icn .Screen/addr DEO2
-	.pointer/x LDZ2 .Screen/x DEO2
-	.pointer/y LDZ2 .Screen/y DEO2
-	#40 .Screen/sprite DEO
-	( record pointer positions )
-	.Mouse/x DEI2 .pointer/x STZ2 .Mouse/y DEI2 .pointer/y STZ2
-	( draw new cursor )
-	;cursor_icn .Screen/addr DEO2
-	.pointer/x LDZ2 .Screen/x DEO2
-	.pointer/y LDZ2 .Screen/y DEO2
-	#42 .Mouse/state DEI #00 NEQ ADD .Screen/sprite DEO
-
-RTN
-
-( generics )
-
-@draw-label ( x y color addr -- )
-	
-	( load ) .label/addr STZ2 .label/color STZ .Screen/y DEO2 .Screen/x DEO2
-	.label/addr LDZ2
-	&loop
-		( draw ) LDAk #00 SWP 8** ;font ADD2 .Screen/addr DEO2 .label/color LDZ .Screen/sprite DEO
-		( incr ) ++
-		( incr ) .Screen/x DEI2 8++ .Screen/x DEO2
-		LDAk ,&loop JCN
-	POP2
-
-RTN
-
-@line-vertical-dotted ( x y0 y1 color -- )
-	
-	.color STZ STH2 SWP2 .Screen/x DEO2 STH2r OVR2 .Screen/y DEO2
-	&draw-ver
-		( draw ) .color LDZ .Screen/pixel DEO
-		( incr ) SWP2 #0002 ADD2 DUP2 .Screen/y DEO2 SWP2
-		OVR2 OVR2 LTH2 ,&draw-ver JCN
-	POP2 POP2
-
-RTN
-
-@line-horizontal-dotted ( x0 x1 y color -- )
-	
-	.color STZ .Screen/y DEO2 OVR2 .Screen/x DEO2
-	&draw-hor
-		( draw ) .color LDZ .Screen/pixel DEO
-		( incr ) SWP2 #0002 ADD2 DUP2 .Screen/x DEO2 SWP2
-		OVR2 OVR2 LTH2 ,&draw-hor JCN
-	POP2 POP2
-
-RTN
-
-@line-rect ( x1 y1 x2 y2 color )
-
-	( load ) .color STZ .rect/y2 STZ2 .rect/x2 STZ2 DUP2 .Screen/y DEO2 .rect/y1 STZ2 DUP2 .Screen/x DEO2 .rect/x1 STZ2
-	&hor
-		( incr ) .Screen/x DEI2 ++ .Screen/x DEO2
-		( draw ) .rect/y1 LDZ2 .Screen/y DEO2 .color LDZ .Screen/pixel DEO
-		( draw ) .rect/y2 LDZ2 .Screen/y DEO2 .color LDZ .Screen/pixel DEO
-		.Screen/x DEI2 .rect/x2 LDZ2 LTH2 ,&hor JCN
-	.rect/y1 LDZ2 .Screen/y DEO2
-	&ver
-		( draw ) .rect/x1 LDZ2 .Screen/x DEO2 .color LDZ .Screen/pixel DEO
-		( draw ) .rect/x2 LDZ2 .Screen/x DEO2 .color LDZ .Screen/pixel DEO
-		( incr ) .Screen/y DEI2 ++ .Screen/y DEO2
-		.Screen/y DEI2 .rect/y2 LDZ2 ++ LTH2 ,&ver JCN
-
-RTN
-
-@ch1_txt [ "SQR 20 00 ]
-@ch2_txt [ "TRI 20 00 ]
-@ch3_txt [ "SINE 00 ]
-@ch4_txt [ "DRUM 00 ]
-@env_txt [ "Envelope 00 ]
-@vol_txt [ "Volume 00 ]
-
-@clear_icn   [ 0000 0000 0000 0000 ]
-@cursor_icn  [ 80c0 e0f0 f8e0 1000 ]
-@note_icn    [ 0000 1c3e 3e3e 1c00 ]
-@head_icn    [ 0018 1818 7e3c 1800 ]
-
-@notes [
-	3c 3e 40 41 43 45 47
-	48 4a 4c 4d 4f 51 53
-]
-
-@knob_icns [
-	0003 0c10 2020 4040
-	00c0 3008 0404 0202
-	4040 2020 100c 0300
-	0202 0404 0830 c000
-	0000 183c 3c18 0000
-]
-
-@octave_icn [
-	ff00 0000 fefe fffe
-	ff01 0101 0102 fc00
-	fffe fc00 fefe fffe
-	ff01 0101 0102 fc00
-	fffe fc00 fefe fffe
-	ff01 0101 0102 fc00
-	fffe fc00 0000 ff00
-	ff01 0101 0102 fc00
-	ff00 0000 fefe fffe
-	ff01 0101 0102 fc00
-	fffe fc00 fefe fffe
-	ff01 0101 0102 fc00
-	fffe fc00 0000 ff00
-	ff01 0101 0102 fc00
-]
-
-@knob_offsetx [
-	01 00 00 00 00 01 02 03
-	05 06 07 08 08 08 08 07
-]
-
-@knob_offsety [
-	07 06 05 03 02 01 00 00
-	00 00 01 02 03 05 06 07
-]
-
-@font_hex ( 0-F )
-[
-	007c 8282 8282 827c 0030 1010 1010 1010
-	007c 8202 7c80 80fe 007c 8202 1c02 827c
-	000c 1424 4484 fe04 00fe 8080 7c02 827c
-	007c 8280 fc82 827c 007c 8202 1e02 0202
-	007c 8282 7c82 827c 007c 8282 7e02 827c
-	007c 8202 7e82 827e 00fc 8282 fc82 82fc
-	007c 8280 8080 827c 00fc 8282 8282 82fc
-	007c 8280 f080 827c 007c 8280 f080 8080
-]
-
-@font ( spectrum-zx font )
-[
-	0000 0000 0000 0000 0000 2400 7e3c 0000 0000 2400 3c42 0000 0000 6c7c 7c38 1000
-	0010 387c 7c38 1000 0038 387c 6c10 3800 0010 387c 7c10 3800 0000 0018 1800 0000
-	007e 4242 4242 7e00 0000 1824 2418 0000 0018 2442 4224 1800 001e 063a 4a48 3000
-	0038 446c 107c 1000 000c 0808 0838 3800 003e 2222 2266 6600 0000 0822 0022 0800
-	0000 1018 1c18 1000 0000 0818 3818 0800 0008 1c00 001c 0800 0028 2828 2800 2800
-	003e 4a4a 3a0a 0a00 000c 3046 620c 3000 0000 0000 0000 ffff 0010 3800 3810 0038
-	0008 1c2a 0808 0800 0008 0808 2a1c 0800 0000 0804 7e04 0800 0000 1020 7e20 1000
-	0000 4040 7e00 0000 0000 0024 6624 0000 0000 1038 7c00 0000 0000 007c 3810 0000
-	0000 0000 0000 0000 0008 0808 0800 0800 0014 1400 0000 0000 0024 7e24 247e 2400
-	0008 1e28 1c0a 3c08 0042 0408 1020 4200 0030 4832 4c44 3a00 0008 1000 0000 0000
-	0004 0808 0808 0400 0010 0808 0808 1000 0000 1408 3e08 1400 0000 0808 3e08 0800
-	0000 0000 0008 0810 0000 0000 3c00 0000 0000 0000 0000 0800 0000 0204 0810 2000
-	003c 464a 5262 3c00 0018 2808 0808 3e00 003c 4202 3c40 7e00 003c 421c 0242 3c00
-	0008 1828 487e 0800 007e 407c 0242 3c00 003c 407c 4242 3c00 007e 0204 0810 1000
-	003c 423c 4242 3c00 003c 4242 3e02 3c00 0000 0008 0000 0800 0000 0800 0008 0810
-	0000 0810 2010 0800 0000 003e 003e 0000 0000 1008 0408 1000 003c 4202 0c00 0800
-	003c 425a 5442 3c00 0018 2442 7e42 4200 007c 427c 4242 7c00 003c 4240 4042 3c00
-	0078 4442 4244 7800 007e 407c 4040 7e00 003e 4040 7c40 4000 003c 4240 4e42 3c00
-	0042 427e 4242 4200 003e 0808 0808 3e00 0002 0202 4242 3c00 0044 4870 4844 4200
-	0040 4040 4040 7e00 0042 665a 4242 4200 0042 6252 4a46 4200 003c 4242 4242 3c00
-	007c 4242 7c40 4000 003c 4242 524a 3c00 007c 4242 7c44 4200 003c 403c 0242 3c00
-	00fe 1010 1010 1000 0042 4242 4242 3c00 0042 4242 4224 1800 0042 4242 5a66 4200
-	0042 2418 1824 4200 0082 4428 1010 1000 007e 0408 1020 7e00 000c 0808 0808 0c00
-	0040 2010 0804 0200 0018 0808 0808 1800 0008 1422 0000 0000 0000 0000 0000 7e00
-	0008 0400 0000 0000 0000 1c02 1e22 1e00 0020 203c 2222 3c00 0000 1e20 2020 1e00
-	0002 021e 2222 1e00 0000 1c22 3c20 1e00 000c 101c 1010 1000 0000 1c22 221e 021c
-	0020 202c 3222 2200 0008 0018 0808 0400 0008 0008 0808 4830 0020 2428 3028 2400
-	0010 1010 1010 0c00 0000 6854 5454 5400 0000 5864 4444 4400 0000 3844 4444 3800
-	0000 7844 4478 4040 0000 3c44 443c 0406 0000 2c30 2020 2000 0000 3840 3804 7800
-	0010 103c 1010 0c00 0000 4444 4444 3800 0000 4444 2828 1000 0000 4454 5454 2800
-	0000 4428 1028 4400 0000 4444 443c 0438 0000 7c08 1020 7c00 000c 0810 1008 0c00
-	0008 0808 0808 0800 0030 1008 0810 3000 0000 0032 4c00 0000 3c42 99a1 a199 423c
-]
-
-@square-wave
-	28 d8
-	&end
-
-@triangle-wave
-	8082 8486 888a 8c8e 9092 9496 989a 9c9e a0a2 a4a6 a8aa acae
-	b0b2 b4b6 b8ba bcbe c0c1 c3c5 c7c9 cbcd cfd1 d3d5 d7d9 dbdd
-	dfe1 e3e5 e7e9 ebed eff1 f3f5 f7f9 fbfd fffd fbf9 f7f5 f3f1
-	efed ebe9 e7e5 e3e1 dfdd dbd9 d7d5 d3d1 cfcd cbc9 c7c5 c3c1
-	c0be bcba b8b6 b4b2 b0ae acaa a8a6 a4a2 a09e 9c9a 9896 9492
-	908e 8c8a 8886 8482 807e 7c7a 7876 7472 706e 6c6a 6866 6462
-	605e 5c5a 5856 5452 504e 4c4a 4846 4442 413f 3d3b 3937 3533
-	312f 2d2b 2927 2523 211f 1d1b 1917 1513 110f 0d0b 0907 0503
-	0103 0507 090b 0d0f 1113 1517 191b 1d1f 2123 2527 292b 2d2f
-	3133 3537 393b 3d3f 4142 4446 484a 4c4e 5052 5456 585a 5c5e
-	6062 6466 686a 6c6e 7072 7476 787a 7c7e
-	&end
-
-@sine-wave
-	8084 898e 9297 9ca0 a5a9 aeb2 b6bb bfc3 c7cb ced2 d6d9 dce0
-	e3e5 e8eb edf0 f2f4 f6f7 f9fa fbfc fdfe fefe fefe fefe fdfc
-	fbfa f9f8 f6f4 f2f0 eeeb e9e6 e3e0 ddda d7d3 cfcc c8c4 c0bc
-	b8b3 afaa a6a1 9d98 948f 8a85 817c 7772 6e69 6460 5b57 524e
-	4a45 413d 3935 312e 2a27 2320 1d1a 1715 1210 0e0c 0a08 0705
-	0403 0202 0101 0101 0101 0202 0304 0607 090a 0c0e 1113 1518
-	1b1e 2124 282b 2f32 363a 3e42 464b 4f53 585c 6166 6a6f 7478
-	7d82 878b 9095 999e a3a7 acb0 b4b9 bdc1 c5c9 cdd0 d4d7 dbde
-	e1e4 e7ea ecee f1f3 f5f6 f8f9 fbfc fdfd fefe fefe fefe fdfd
-	fcfb faf8 f7f5 f3f1 efed eae8 e5e2 dfdc d8d5 d1ce cac6 c2be
-	bab5 b1ad a8a4 9f9b 9691 8d88 837e 7a75 706b 6762 5e59 5550
-	4c47 433f 3b37 3330 2c28 2522 1f1c 1916 1411 0f0d 0b09 0706
-	0504 0302 0101 0101 0101 0102 0304 0506 0809 0b0d 0f12 1417
-	1a1c 1f23 2629 2d31 3438 3c40 4449 4d51 565a 5f63 686d 7176
-	7b
-	&end
-
-@noise-wave-end
diff --git a/projects/examples/devices/audio.tal b/projects/examples/devices/audio.tal
index e6bd54f..adf54f5 100644
--- a/projects/examples/devices/audio.tal
+++ b/projects/examples/devices/audio.tal
@@ -1,68 +1,160 @@
 ( dev/audio )
 
+%2// { #01 SFT2 }
 %4** { #20 SFT2 }
 %8** { #30 SFT2 }
+%20MOD { #1f AND }
+%RTN { JMP2r }
+
+%GET-NOTE { #00 SWP ;melody ADD2 LDA }
+%GET-HEXCHAR  { #00 SWP 8** ;font-hex ADD2 .Screen/addr DEO2 }
 
 ( devices )
 
 |00 @System     [ &vector $2 &pad      $6 &r      $2 &g     $2 &b      $2 ]
 |20 @Screen     [ &vector $2 &width    $2 &height $2 &pad   $2 &x      $2 &y    $2 &addr  $2 &pixel $1 &sprite $1 ]
 |30 @Audio0     [ &vector $2 &position $2 &output $1 &pad   $3 &adsr   $2 &length $2 &addr $2 &volume $1 &pitch $1 ]
+|80 @Controller [ &vector $2 &button $1 &key    $1 ]
 
 ( variables )
 
 |0000
 
-@timer    $1
-@progress $1
+@timer     $1
+@progress  $1
+@selection $1
+@offset
+	&x $2 &y $2
 
 |0100 ( -> )
 	
 	( theme )
-	#00ff .System/r DEO2 
+	#0fff .System/r DEO2 
 	#0f0f .System/g DEO2 
-	#0ff0 .System/b DEO2 
+	#0f00 .System/b DEO2 
 
 	( vectors )
 	;on-frame .Screen/vector DEO2
+	;on-button .Controller/vector DEO2
 
 	( setup synth )
-	#1202 .Audio0/adsr DEO2
+	#0202 .Audio0/adsr DEO2
 	;saw .Audio0/addr DEO2
 	#0100 .Audio0/length DEO2
-	#ff .Audio0/volume DEO
+	#00 .Audio0/volume DEO ( TODO: turn ON )
 
+	( center )
+	.Screen/width DEI2 2// #0080 SUB2 .offset/x STZ2
+	.Screen/height DEI2 2// #0040 SUB2 .offset/y STZ2
+
+	;draw JSR2
+	#02 ;draw-selector JSR2
+
+BRK
+
+@on-button ( -> )
+
+	.Controller/button DEI #04 SFT
+	[ #01 ] NEQk NIP ,&no-up JCN 
+		.selection LDZ STHk 
+		#00 ;draw-note JSR2
+		[ STHkr GET-NOTE #01 ADD ] #00 STHkr ;melody ADD2 STA
+		STHr #01 ;draw-note JSR2
+		#02 ;draw-selector JSR2
+		&no-up
+	[ #02 ] NEQk NIP ,&no-down JCN 
+		.selection LDZ STHk 
+		#00 ;draw-note JSR2
+		[ STHkr GET-NOTE #01 SUB ] #00 STHkr ;melody ADD2 STA
+		STHr #01 ;draw-note JSR2
+		#02 ;draw-selector JSR2
+		&no-down
+	[ #04 ] NEQk NIP ,&no-left JCN 
+		#00 ;draw-selector JSR2
+		.selection LDZ #01 SUB 20MOD .selection STZ
+		#02 ;draw-selector JSR2
+		&no-left
+	[ #08 ] NEQk NIP ,&no-right JCN 
+		#00 ;draw-selector JSR2
+		.selection LDZ INC 20MOD .selection STZ
+		#02 ;draw-selector JSR2
+		&no-right
+	POP
+	
 BRK
 
 @on-frame ( -> )
 
-	( incr ) .timer LDZ #01 ADD .timer STZ 
+	( incr ) .timer LDZ INC .timer STZ 
 	( skip ) .timer LDZ #10 EQU #01 JCN [ BRK ]
-
-	( get note )
-	;melody #00 .progress LDZ ADD2 LDA 
-
-	( play note )
-	DUP .Audio0/pitch DEO
-
-	( erase last note )
-	#00 .Screen/sprite DEO
-
-	( draw note )
-	#00 SWP 4** #0100 SUB2 .Screen/y DEO2
-	#00 .progress LDZ 8** .Screen/x DEO2
-	;dot .Screen/addr DEO2
-	#01 .Screen/sprite DEO
-
-	( incr ) .progress LDZ #01 ADD #1f AND .progress STZ
-
+	.progress LDZ 
+	( play note )    DUP GET-NOTE .Audio0/pitch DEO
+	( erase last )   DUP #01 SUB 20MOD #01 ,draw-note JSR
+	( draw current ) #01 ,draw-note JSR
+	( incr ) .progress LDZ INC 20MOD .progress STZ
 	#00 .timer STZ
 
 BRK
 
-@dot [ 003c 7eff 7e3c 0000 ] 
+@draw ( -- )
 
-@saw [
+	#20 #00
+	&loop
+		DUP #01 ,draw-note JSR
+		INC GTHk ,&loop JCN
+	POP2
+
+RTN
+
+@draw-note ( id color -- )
+
+	STH STH
+	( set x ) [ #00 STHkr ] 8** .offset/x LDZ2 ADD2 .Screen/x DEO2
+	( set y ) [ #00 #00 STHkr ;melody ADD2 LDA ] 4** #0100 SWP2 SUB2 .offset/y LDZ2 ADD2 #0080 ADD2 .Screen/y DEO2
+	( set addr ) ;marker-icn [ #00 .progress LDZ STHr EQU #08 MUL ADD2 ] .Screen/addr DEO2
+	( draw ) STHr .Screen/sprite DEO
+
+RTN
+
+@draw-selector ( color -- )
+	
+	STH
+	[ #00 .selection LDZ ] 8** .offset/x LDZ2 ADD2 .Screen/x DEO2
+	#0070 .offset/y LDZ2 ADD2 .Screen/y DEO2
+	;selector-icn .Screen/addr DEO2
+	STHkr .Screen/sprite DEO
+
+	.Screen/y DEI2 #0008 ADD2 .Screen/y DEO2
+	.selection LDZ GET-NOTE STHr ,draw-byte JSR
+
+RTN
+
+@draw-byte ( byte color -- )
+	
+	STH 
+	DUP 
+		#04 SFT GET-HEXCHAR 
+		( draw ) STHkr .Screen/sprite DEO
+	.Screen/x DEI2 #0008 ADD2 .Screen/x DEO2
+		#0f AND GET-HEXCHAR 
+		( draw ) STHr .Screen/sprite DEO
+
+RTN
+
+@melody 
+	54 52 54 4f 4b 4f 48 00
+	54 52 54 4f 4b 4f 48 00
+	54 56 57 56 57 54 56 54 
+	56 52 54 52 54 50 54 00 
+
+@selector-icn
+	0000 0010 387c 0000
+
+@marker-icn
+	3844 8282 8244 3800
+	387c fefe fe7c 3800
+
+@saw 
 	0003 0609 0c0f 1215 181b 1e21 2427 2a2d
 	3033 3639 3b3e 4143 4649 4b4e 5052 5557
 	595b 5e60 6264 6667 696b 6c6e 7071 7274
@@ -78,10 +170,14 @@ BRK
 	8182 8282 8282 8383 8485 8586 8788 898a
 	8b8c 8e8f 9092 9495 9799 9a9c 9ea0 a2a5
 	a7a9 abae b0b2 b5b7 babd bfc2 c5c7 cacd
-	d0d3 d6d9 dcdf e2e5 e8eb eef1 f4f7 fafd ]
+	d0d3 d6d9 dcdf e2e5 e8eb eef1 f4f7 fafd 
 
-@melody [ 
-	54 52 54 4f 4b 4f 48 ff
-	54 52 54 4f 4b 4f 48 ff
-	54 56 57 56 57 54 56 54 
-	56 52 54 52 54 50 54 ff ] 
+@font-hex ( 0-F )
+	007c 8282 8282 827c 0030 1010 1010 1010
+	007c 8202 7c80 80fe 007c 8202 1c02 827c
+	000c 1424 4484 fe04 00fe 8080 7c02 827c
+	007c 8280 fc82 827c 007c 8202 1e02 0202
+	007c 8282 7c82 827c 007c 8282 7e02 827c
+	007c 8202 7e82 827e 00fc 8282 fc82 82fc
+	007c 8280 8080 827c 00fc 8282 8282 82fc
+	007c 8280 f080 827c 007c 8280 f080 8080
\ No newline at end of file