diff --git a/main.py b/main.py
index 687793c..01c54cc 100644
--- a/main.py
+++ b/main.py
@@ -18,3 +18,7 @@ async def blackbox(blackbox_name: Union[str, None] = None, request: Request = No
     except ValueError:
         return await JSONResponse(content={"error": "value error"}, status_code=status.HTTP_400_BAD_REQUEST)
     return await box.fast_api_handler(request)
+
+@app.post("/workflows")
+async def workflows(reqest: Request):
+    print("workflows")
\ No newline at end of file
diff --git a/runtime/ast/runtime.py b/runtime/ast/runtime.py
index bd82f5d..8449e82 100644
--- a/runtime/ast/runtime.py
+++ b/runtime/ast/runtime.py
@@ -4,7 +4,8 @@ class Runtime:
         self.parent = parent
         self.records = records
     
-    def run(self, ast):
+    def run(self, ast, records={}):
+        self.records.update(records)
         if ast["type"] == "Program":
             return self.program(ast)
     
@@ -44,6 +45,8 @@ class Runtime:
         for arg in args:
             unquoted_args.append(self.unquote(arg))
         fu = self.records.get(id)
+        if fu == None:
+            raise Exception("Function not found: " + id)
         return fu(*unquoted_args)
 
     def unquote(self, ast):
diff --git a/src/blackbox/audio_to_text.py b/src/blackbox/audio_to_text.py
index e8f1201..f8a3e9e 100644
--- a/src/blackbox/audio_to_text.py
+++ b/src/blackbox/audio_to_text.py
@@ -8,6 +8,9 @@ from .blackbox import Blackbox
 
 class AudioToText(Blackbox):
 
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def valid(self, *args, **kwargs) -> bool :
         data = args[0]
         kind = filetype.guess(data)
@@ -15,7 +18,8 @@ class AudioToText(Blackbox):
             return False
         return kind.extension == "wav"
 
-    async def processing(self, data: bytes | io.BytesIO):
+    def processing(self, *args, **kwargs):
+        data = args[0]
         if data is None:
             raise ValueError("Data is required")
         if isinstance(data, bytes):
diff --git a/src/blackbox/blackbox.py b/src/blackbox/blackbox.py
index c20b483..8907073 100644
--- a/src/blackbox/blackbox.py
+++ b/src/blackbox/blackbox.py
@@ -8,7 +8,7 @@ class Blackbox(ABC):
     the methods processing, valid and fast_api_handler.
     If implemented correctly, the blackbox class can be used in the main.py file
     """
-    def __init__(self, *args, **kwargs) -> None:
+    def __init__(self, *args, **kwargs):
         pass
 
     """
@@ -18,7 +18,7 @@ class Blackbox(ABC):
     Output same as above.
     """
     @abstractmethod
-    async def processing(self, *args, **kwargs) -> any:
+    async def processing(self, *args, **kwargs):
         pass
 
     """
@@ -34,5 +34,9 @@ class Blackbox(ABC):
     to the method.
     """
     @abstractmethod
-    def fast_api_handler(self, request: Request) -> Response:
+    async def fast_api_handler(self, request: Request) -> Response:
+        pass
+
+    @abstractmethod
+    def __call__(self, *args, **kwargs):
         pass
\ No newline at end of file
diff --git a/src/blackbox/blackbox_factory.py b/src/blackbox/blackbox_factory.py
index e540701..7014a84 100644
--- a/src/blackbox/blackbox_factory.py
+++ b/src/blackbox/blackbox_factory.py
@@ -14,14 +14,21 @@ class BlackboxFactory:
         self.tts = TTS()
         self.asr = ASR("./.env.yaml")
         self.sentiment = Sentiment()
+        self.sum = SUM()
+        self.calculator = Calculator()
+        self.audio_to_text = AudioToText()
+        self.text_to_audio = TextToAudio()
 
-    def create_blackbox(self, blackbox_name: str, blackbox_config: dict) -> Blackbox:
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
+    def create_blackbox(self, blackbox_name: str) -> Blackbox:
         if blackbox_name == "audio_to_text":
-            return AudioToText(blackbox_config)
+            return self.audio_to_text
         if blackbox_name == "text_to_audio":
-            return TextToAudio(blackbox_config)
+            return self.text_to_audio
         if blackbox_name == "calculator":
-            return Calculator(blackbox_config)
+            return self.calculator
         if blackbox_name == "asr":
             return self.asr
         if blackbox_name == "tts":
@@ -29,5 +36,5 @@ class BlackboxFactory:
         if blackbox_name == "sentiment_engine":
             return self.sentiment
         if blackbox_name == "sum":
-            return SUM()
+            return self.sum
         raise ValueError("Invalid blockbox type")
\ No newline at end of file
diff --git a/src/blackbox/calculator.py b/src/blackbox/calculator.py
index 1bee3a9..67c3363 100644
--- a/src/blackbox/calculator.py
+++ b/src/blackbox/calculator.py
@@ -7,6 +7,9 @@ class Calculator(Blackbox):
 
     """This class just for example, it show how to implement Blackbox interface."""
     
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def valid(self, *args, **kwargs) -> bool:
         data = args[0]
         return isinstance(data, dict) and "op" in data and "left" in data and "right" in data
diff --git a/src/blackbox/sentiment.py b/src/blackbox/sentiment.py
index a77180a..0981204 100644
--- a/src/blackbox/sentiment.py
+++ b/src/blackbox/sentiment.py
@@ -12,6 +12,9 @@ class Sentiment(Blackbox):
     def __init__(self) -> None:
         self.engine = SentimentEngine('resources/sentiment_engine/models/paimon_sentiment.onnx')
 
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def valid(self,  *args, **kwargs) -> bool:
         data = args[0]
         return isinstance(data, str)
diff --git a/src/blackbox/sum.py b/src/blackbox/sum.py
index f472a90..79a8137 100644
--- a/src/blackbox/sum.py
+++ b/src/blackbox/sum.py
@@ -7,13 +7,15 @@ from .blackbox import Blackbox
 
 class SUM(Blackbox):
     
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def valid(self, *args, **kwargs) -> bool:
         data = args[0]
         return isinstance(data, list)
 
-    def processing(self, *args, **kwargs) -> Coroutine[Any, Any, Any]:
-        data = args[0]
-        return sum(data)
+    def processing(self, *args, **kwargs):
+        return sum(args)
     
     async def fast_api_handler(self, request: Request) -> Response:
         try:
diff --git a/src/blackbox/text_to_audio.py b/src/blackbox/text_to_audio.py
index bd90516..561a0c0 100644
--- a/src/blackbox/text_to_audio.py
+++ b/src/blackbox/text_to_audio.py
@@ -6,6 +6,9 @@ from io import BytesIO
 
 class TextToAudio(Blackbox):
     
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def valid(self, data: any) -> bool:
         return isinstance(data, str)
     
diff --git a/src/blackbox/tts.py b/src/blackbox/tts.py
index 7c1cd2c..68caa4d 100644
--- a/src/blackbox/tts.py
+++ b/src/blackbox/tts.py
@@ -18,6 +18,9 @@ class TTS(Blackbox):
         self.tts_service = TTService(*config['catmaid'])
         super().__init__(config)
     
+    def __call__(self, *args, **kwargs):
+        return self.processing(*args, **kwargs)
+
     def processing(self, *args, **kwargs) -> io.BytesIO:
         text = args[0]
         audio = self.tts_service.read(text)
diff --git a/test_data/test.mp3 b/test_data/test.mp3
new file mode 100644
index 0000000..642f21c
Binary files /dev/null and b/test_data/test.mp3 differ
diff --git a/test_data/testone.wav b/test_data/testone.wav
new file mode 100644
index 0000000..6c351c9
Binary files /dev/null and b/test_data/testone.wav differ