validate sample rate in stt streamers

stt_streamers/deepgram_streamer.py

@@ -15,7 +15,8 @@ class DeepgramStreamer:
         api_key = os.environ.get("DEEPGRAM_API_KEY")
         if not api_key:
             raise RuntimeError("Missing DEEPGRAM_API_KEY.")
-
+        if not fs_hz:
+            raise ValueError("Sample rate (fs_hz) must be specified.")
         self.stream_name = stream_name
         self.api_name = "Deepgram V1 Nova-3"
         self.on_update = on_update

stt_streamers/soniox_streamer.py

@@ -13,7 +13,8 @@ class SonioxStreamer:
         api_key = os.environ.get("SONIOX_API_KEY")
         if not api_key:
             raise RuntimeError("Missing SONIOX_API_KEY.")
-
+        if not fs_hz:
+            raise ValueError("Sample rate (fs_hz) must be specified.")
         self.stream_name = stream_name
         self.api_name = "Soniox RT"
         self.on_update = on_update