diff --git a/type-a.tal b/type-a.tal
new file mode 100644
index 0000000..cd455a2
--- /dev/null
+++ b/type-a.tal
@@ -0,0 +1,67 @@
+|0000
+    @counter $1
+    @position $2
+
+|0100
+    ( set up treble )
+    #0300   #38 DEO2 ( adsr )
+    #0002   #3a DEO2 ( len )
+    ;square #3c DEO2 ( addr )
+    #ff     #3e DEO  ( volume )
+
+    ( set up bass )
+    #0600   #48 DEO2 ( adsr )
+    #0002   #4a DEO2 ( len )
+    ;square #4c DEO2 ( addr )
+    #ff     #4e DEO  ( volume )
+
+    ( set up callback )
+    ;on-screen #20 DEO2
+    BRK
+
+@play ( dev^ track* -> )
+    .position LDZ2 ADD2 LDA
+    DUP ?&sound POP !&rest &sound SWP DEO JMP2r
+    &rest POP JMP2r
+
+@on-screen
+    .counter LDZ ?&skip
+    #3f ;treble play
+    #4f ;bass play
+    .position LDZ2k INC2 #00c0 DIV2k MUL2 SUB2 ROT STZ2
+    &skip .counter LDZk INC #0b DIVk MUL SUB SWP STZ
+    BRK
+
+@square ff 00
+
+@treble
+    [ 40 00 3b 3c ] [ 3e 00 3c 3b ] [ 39 00 39 3c ] [ 40 00 3e 3c ]
+    [ 3b 00 00 3c ] [ 3e 00 40 00 ] [ 3c 00 39 00 ] [ 39 00 00 00 ]
+    [ 00 3e 00 41 ] [ 45 00 43 41 ] [ 40 00 00 3c ] [ 40 00 3e 3c ]
+    [ 3b 00 3b 3c ] [ 3e 00 40 00 ] [ 3c 00 39 00 ] [ 39 00 00 00 ]
+
+    [ 40 00 3b 3c ] [ 3e 00 3c 3b ] [ 39 00 39 3c ] [ 40 00 3e 3c ]
+    [ 3b 00 00 3c ] [ 3e 00 40 00 ] [ 3c 00 39 00 ] [ 39 00 00 00 ]
+    [ 00 3e 00 41 ] [ 45 00 43 41 ] [ 40 00 00 3c ] [ 40 00 3e 3c ]
+    [ 3b 00 3b 3c ] [ 3e 00 40 00 ] [ 3c 00 39 00 ] [ 39 00 00 00 ]
+
+    [ 40 00 00 00 ] [ 3c 00 00 00 ] [ 3e 00 00 00 ] [ 3b 00 00 00 ]
+    [ 3c 00 00 00 ] [ 39 00 00 00 ] [ 38 00 00 00 ] [ 3b 00 00 00 ]
+    [ 40 00 00 00 ] [ 3c 00 00 00 ] [ 3e 00 00 00 ] [ 3b 00 00 00 ]
+    [ 3c 00 00 00 ] [ 39 00 00 00 ] [ 38 00 00 00 ] [ 3b 00 00 00 ]
+
+@bass
+    [ 28 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 2d 00 00 00 ]
+    [ 2c 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 00 00 00 00 ]
+    [ 26 00 00 00 ] [ 26 00 00 00 ] [ 24 00 00 00 ] [ 24 00 00 00 ]
+    [ 28 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 00 00 00 00 ]
+
+    [ 28 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 2d 00 00 00 ]
+    [ 2c 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 00 00 00 00 ]
+    [ 26 00 00 00 ] [ 26 00 00 00 ] [ 24 00 00 00 ] [ 24 00 00 00 ]
+    [ 28 00 00 00 ] [ 28 00 00 00 ] [ 2d 00 00 00 ] [ 00 00 00 00 ]
+
+    [ 2d 00 00 00 ] [ 2d 00 00 00 ] [ 2c 00 00 00 ] [ 2c 00 00 00 ] 
+    [ 2d 00 00 00 ] [ 2d 00 00 00 ] [ 2c 00 00 00 ] [ 00 00 00 00 ] 
+    [ 2d 00 00 00 ] [ 2d 00 00 00 ] [ 2c 00 00 00 ] [ 2c 00 00 00 ] 
+    [ 2d 00 00 00 ] [ 2d 00 00 00 ] [ 2c 00 00 00 ] [ 00 00 00 00 ]