fix: MiniMaxHttpTTSService pitch, add base_url arg

CHANGELOG.md

@@ -17,6 +17,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Updated `MiniMaxHttpTTSService` with a `base_url` arg where you can specify
+  the Global endpoint (default) or Mainland China.
+
 - Changed the `livekit` optional dependency for `tenacity` to
   `tenacity>=8.2.3,<10.0.0` in order to support the `google-genai` package.
 
@@ -25,6 +28,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed an issue in `MiniMaxHttpTTSService` where the `pitch` param was the
+  incorrect type.
+
 - Fixed an issue in `OLLamaLLMService` where kwargs were not passed correctly
   to the parent class.
 

src/pipecat/services/minimax/tts.py

@@ -109,7 +109,7 @@ class MiniMaxHttpTTSService(TTSService):
         language: Optional[Language] = Language.EN
         speed: Optional[float] = 1.0
         volume: Optional[float] = 1.0
-        pitch: Optional[float] = 0
+        pitch: Optional[int] = 0
         emotion: Optional[str] = None
         english_normalization: Optional[bool] = None
 
@@ -117,6 +117,7 @@ class MiniMaxHttpTTSService(TTSService):
         self,
         *,
         api_key: str,
+        base_url: str = "https://api.minimax.io/v1/t2a_v2",
         group_id: str,
         model: str = "speech-02-turbo",
         voice_id: str = "Calm_Woman",
@@ -129,6 +130,9 @@ class MiniMaxHttpTTSService(TTSService):
 
         Args:
             api_key: MiniMax API key for authentication.
+            base_url: API base URL, defaults to MiniMax's T2A endpoint.
+                Global: https://api.minimax.io/v1/t2a_v2
+                Mainland China: https://api.minimaxi.chat/v1/t2a_v2
             group_id: MiniMax Group ID to identify project.
             model: TTS model name. Defaults to "speech-02-turbo". Options include
                 "speech-02-hd", "speech-02-turbo", "speech-01-hd", "speech-01-turbo".
@@ -144,7 +148,7 @@ class MiniMaxHttpTTSService(TTSService):
 
         self._api_key = api_key
         self._group_id = group_id
-        self._base_url = f"https://api.minimaxi.chat/v1/t2a_v2?GroupId={group_id}"
+        self._base_url = f"{base_url}?GroupId={group_id}"
         self._session = aiohttp_session
         self._model_name = model
         self._voice_id = voice_id