diff --git a/development/actual_donwload.py b/development/actual_donwload.py
index 4b242ed..76cc2a3 100644
--- a/development/actual_donwload.py
+++ b/development/actual_donwload.py
@@ -6,8 +6,8 @@ logging.getLogger().setLevel(logging.DEBUG)
 
 if __name__ == "__main__":
     commands = [
-        "s: #a Toxoplasma",
-        "d: 16",
+        "s: #a And End...",
+        "d: 10",
     ]
 
     
diff --git a/development/objects_collection.py b/development/objects_collection.py
index 46895bc..9e147f5 100644
--- a/development/objects_collection.py
+++ b/development/objects_collection.py
@@ -30,6 +30,37 @@ if __name__ == "__main__":
         ]
     )
 
+
+    other_artist: Artist = Artist(
+        name="artist",
+        main_album_list=[
+            Album(
+                title="album",
+                song_list=[
+                    Song(
+                        title="song",
+                        album_list=[
+                            Album(
+                                title="album", 
+                                albumsort=123,
+                                main_artist=Artist(name="other_artist"),
+                            ),
+                        ],
+                    ),
+                    Song(
+                        title="other_song",
+                        album_list=[
+                            Album(title="album", albumsort=423),
+                        ],
+                    ),
+                ]
+            ),
+            Album(title="album", barcode="1234567890123"),
+        ]
+    )
+
+    artist.merge(other_artist)
+
     a = artist.main_album_collection[0]
     b = a.song_collection[0].album_collection[0]
     c = a.song_collection[1].album_collection[0]
diff --git a/music_kraken/__init__.py b/music_kraken/__init__.py
index 73dbbf1..7697a3b 100644
--- a/music_kraken/__init__.py
+++ b/music_kraken/__init__.py
@@ -46,7 +46,7 @@ init_logging()
 from . import cli
 
 if DEBUG:
-    sys.setrecursionlimit(100)
+    sys.setrecursionlimit(500)
 
 
 if main_settings['modify_gc']:
diff --git a/music_kraken/objects/lyrics.py b/music_kraken/objects/lyrics.py
index 3650bfa..09f7a3a 100644
--- a/music_kraken/objects/lyrics.py
+++ b/music_kraken/objects/lyrics.py
@@ -34,6 +34,6 @@ class Lyrics(OuterProxy):
     @property
     def metadata(self) -> Metadata:
         return Metadata({
-            id3Mapping.UNSYNCED_LYRICS: self.text.html
+            id3Mapping.UNSYNCED_LYRICS: [self.text.html]
         })
 
diff --git a/music_kraken/objects/parents.py b/music_kraken/objects/parents.py
index 93bb3a9..6385a2d 100644
--- a/music_kraken/objects/parents.py
+++ b/music_kraken/objects/parents.py
@@ -7,7 +7,7 @@ from functools import lru_cache
 from typing import Optional, Dict, Tuple, List, Type, Generic, Any, TypeVar, Set
 
 from .metadata import Metadata
-from ..utils import get_unix_time
+from ..utils import get_unix_time, object_trace
 from ..utils.config import logging_settings, main_settings
 from ..utils.shared import HIGHEST_ID
 from ..utils.hacking import MetaClass
@@ -107,6 +107,7 @@ class OuterProxy:
         self._inner: InnerData = InnerData(type(self), **kwargs)
         self._inner._refers_to_instances.add(self)
 
+        object_trace(f"creating {type(self).__name__} [{self.title_string}]")
         self.__init_collections__()
 
         for name, data_list in collection_data.items():
@@ -182,6 +183,8 @@ class OuterProxy:
         if __other is None:
             return
 
+        object_trace(f"merging {type(self).__name__} [{self.title_string}] with {type(__other).__name__} [{__other.title_string}]")
+
         a = self
         b = __other
 
diff --git a/music_kraken/objects/source.py b/music_kraken/objects/source.py
index 3a1fec4..5a8a560 100644
--- a/music_kraken/objects/source.py
+++ b/music_kraken/objects/source.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from collections import defaultdict
 from enum import Enum
 from typing import List, Dict, Set, Tuple, Optional, Iterable
@@ -103,12 +105,23 @@ class Source(OuterProxy):
             ('audio_url', self.audio_url),
         ]
 
+    def __merge__(self, __other: Source, override: bool = False):
+        if override:
+            self.audio_url = __other.audio_url
+
+        if self.audio_url is None or (override and __other.audio_url is not None):
+            self.audio_url = __other.audio_url
+
     def __str__(self):
         return self.__repr__()
 
     def __repr__(self) -> str:
         return f"Src({self.page_enum.value}: {self.url}, {self.audio_url})"
 
+    @property
+    def title_string(self) -> str:
+        return self.url
+
     page_str = property(fget=lambda self: self.page_enum.value)
     type_str = property(fget=lambda self: self.type_enum.value)
     homepage = property(fget=lambda self: SourcePages.get_homepage(self.page_enum))
diff --git a/music_kraken/utils/__init__.py b/music_kraken/utils/__init__.py
index 6b4754e..67fcd7d 100644
--- a/music_kraken/utils/__init__.py
+++ b/music_kraken/utils/__init__.py
@@ -52,6 +52,12 @@ def trace(msg: str):
 
     output("trace: " + msg, BColors.OKBLUE)
 
+def object_trace(obj):
+    if not DEBUG_TRACE:
+        return
+
+    output("object: " + str(obj), BColors.GREY)
+
 
 """
 misc functions
diff --git a/music_kraken/utils/shared.py b/music_kraken/utils/shared.py
index cf3cda7..b3f30e5 100644
--- a/music_kraken/utils/shared.py
+++ b/music_kraken/utils/shared.py
@@ -15,6 +15,7 @@ __stage__ = os.getenv("STAGE", "prod")
 DEBUG = (__stage__ == "dev") and True
 DEBUG_LOGGING = DEBUG and False
 DEBUG_TRACE = DEBUG and True
+DEBUG_OBJECT_TRACE = DEBUG and False
 DEBUG_YOUTUBE_INITIALIZING = DEBUG and False
 DEBUG_PAGES = DEBUG and False
 DEBUG_DUMP = DEBUG and True