feat: Update generate_speech function to use gTTS backend with MP3 format and modify voice parameter to accept language codes. Clean up tts_service.py by removing unused GROQ API key checks and related code.

services/mcp_service.py

@@ -49,7 +49,11 @@ def transcribe_audio(audio_path: str) -> str:
     return speech_to_text(audio_path)
 
 @mcp_server.tool()
-def generate_speech(text: str, voice: str = "Aaliyah-PlayAI", format: str = "wav") -> str:
+def generate_speech(text: str, voice: str = "en", format: str = "mp3") -> str:
+    """
+    Generate speech using the free gTTS backend (MP3 only).
+    'voice' expects a language code (e.g., 'en', 'fr').
+    """
     return text_to_speech(text, voice, format)
 
 @mcp_server.tool()

services/tts_service.py

@@ -1,8 +1,8 @@
 import uuid
 from pathlib import Path
-from config import GROQ_TTS_API_KEY, GROQ_TTS_MODEL
 from gtts import gTTS
 
+
 def text_to_speech(
     text: str,
     voice: str = "en",
@@ -12,26 +12,6 @@ def text_to_speech(
     Convert text to speech using gTTS (Google Translate, free).
     Only MP3 is supported.
     """
-    if not GROQ_TTS_API_KEY:
-        raise RuntimeError("GROQ_TTS_API_KEY is not set in config")
-    
-    if not text or not text.strip():
-        raise ValueError("Text cannot be empty")
-    
-    url = "https://api.groq.com/openai/v1/audio/speech"
-    
-    headers = {
-        "Authorization": f"Bearer {GROQ_TTS_API_KEY}",
-        "Content-Type": "application/json"
-    }
-    
-    payload = {
-        "model": GROQ_TTS_MODEL,
-        "input": text.strip(),
-        "voice": voice,
-        "response_format": fmt
-    }
-    
     if not text or not text.strip():
         raise ValueError("Text cannot be empty")