Update piper_engine.py

piper_engine.py

@@ -3,14 +3,11 @@
 import io
 import numpy as np
 import soundfile as sf
-
 from piper.voice import PiperVoice
 
-
 class PiperEngine:
 
     def __init__(self, model_path):
-        # Load the voice model
         self.voice = PiperVoice.load(model_path)
 
     def synthesize(
@@ -20,33 +17,22 @@ class PiperEngine:
         pitch=1.0,
         sample_rate=22050,
     ):
-        """
-        Synthesizes expressive speech from text using Piper.
-        Returns a BytesIO WAV buffer.
-        """
 
-        # Generate raw audio (generator)
+        # Correctly call synthesize with keyword arguments
         audio_gen = self.voice.synthesize(
-            text,
-            1 / speed,  # length_scale
-            pitch       # pitch_scale
+            text=text,
+            length_scale=1 / speed,
+            pitch_scale=pitch
         )
 
-        # Consume generator into a NumPy array
+        # Consume generator into NumPy array
         audio = np.fromiter(audio_gen, dtype=np.float32)
 
-        # Ensure audio is 2D: shape (samples, channels)
         if audio.ndim == 1:
             audio = audio[:, np.newaxis]
 
-        # Write to WAV buffer
         buffer = io.BytesIO()
-        sf.write(
-            buffer,
-            audio,
-            sample_rate,
-            format="WAV",
-        )
+        sf.write(buffer, audio, sample_rate, format="WAV")
         buffer.seek(0)
 
         return buffer