serialize everything (error on the sheet type)

poc/poc.yml

@@ -14,36 +14,38 @@ channels:
   melody:
     instr: sine
     score:
-      aabc.
-      'rt°y
-      +d+d+d---
-      /ff/f\\
-      ab>c<ba
-      ;this is a comment (or lyrics whatever),
-      s:df
-      (3deff)
-      (deff)
-      [ffe]
-      {l 1-cos((PI*x)/2),acced}
-      abbc!o5cc!v15feed!l4fedd!t60hdd
-      # rest: .
-      # pizz.: '°
-      # volume: +-
-      # length: /\
-      # octave: ><
-      # comment?: ;,
-      # start here: ':'
-      # slope: {MODIFIER EXPR, score}
-      #   note modifier prefix: n
-      #   volume modifier prefix: v
-      #   octave modifier prefix: o
-      #   length modifier prefix: l
-      #   tempo modifier prefix: t
-      # loop: ()
-      # loop with count: (COUNT, score)
-      # tuple: []
-      # modifier: !
-      #   volume modifier prefix: v
-      #   octave modifier prefix: o
-      #   length modifier prefix: l
-      #   tempo modifier prefix: t
+      notes: cCdDefFgGaAb
+      sheet:
+        aabc.
+        'rt°y
+        +d+d+d---
+        /ff/f\\
+        ab>c<ba
+        ;this is a comment (or lyrics whatever),
+        s:df
+        (3deff)
+        (deff)
+        [ffe]
+        {l 1-cos((PI*x)/2),acced}
+        abbc!o5cc!v15feed!l4fedd!t60hdd
+        # rest: .
+        # pizz.: '°
+        # volume: +-
+        # length: /\
+        # octave: ><
+        # comment?: ;,
+        # start here: ':'
+        # slope: {MODIFIER EXPR, score}
+        #   note modifier prefix: n
+        #   volume modifier prefix: v
+        #   octave modifier prefix: o
+        #   length modifier prefix: l
+        #   tempo modifier prefix: t
+        # loop: ()
+        # loop with count: (COUNT, score)
+        # tuple: []
+        # modifier: !
+        #   volume modifier prefix: v
+        #   octave modifier prefix: o
+        #   length modifier prefix: l
+        #   tempo modifier prefix: t