Refactor multiple samples as SampleList

ziffers/classes/items.py

@@ -500,6 +500,11 @@ class Sample(Event):
 
     name: str
 
+@dataclass(kw_only=True)
+class SampleList(Item):
+    """Class for using multiple samples"""
+
+    values: list
 
 @dataclass(kw_only=True)
 class VariableList(Item):

ziffers/classes/sequences.py

@@ -31,6 +31,7 @@ from .items import (
     Modification,
     Whitespace,
     Sample,
+    SampleList
 )
 
 
@@ -78,10 +79,12 @@ def resolve_item(item: Meta, options: dict):
                 yield from resolve_item(variable, options)
     elif isinstance(item, VariableList):
         seqlist = []
+        sample_list = True
         for var in item.values:
             if var.name in options:
                 opt_item = options[var.name]
                 if isinstance(opt_item, LambdaType):
+                    sample_list = False
                     seqlist.append(
                         Function(
                             run=opt_item,
@@ -100,8 +103,12 @@ def resolve_item(item: Meta, options: dict):
                         )
                     )
                 elif isinstance(opt_item, Sequence):
+                    sample_list = False
                     seqlist.append(opt_item)
         if len(seqlist) > 0:
+            if sample_list:
+                yield SampleList(values=seqlist)
+            else:
                 yield PolyphonicSequence(values=seqlist)
     elif isinstance(item, Range):
         yield from item.evaluate(options)