Enforce phonemizer definition for synthesis

TTS/tts/utils/text/tokenizer.py

@@ -191,6 +191,7 @@ class TTSTokenizer:
                     phonemizer = get_phonemizer_by_name(
                         DEF_LANG_TO_PHONEMIZER[config.phoneme_language], **phonemizer_kwargs
                     )
+                    new_config.phonemizer = phonemizer.name()
                 except KeyError as e:
                     raise ValueError(
                         f"""No phonemizer found for language {config.phoneme_language}.

TTS/utils/synthesizer.py

@@ -112,6 +112,9 @@ class Synthesizer(object):
         self.use_phonemes = self.tts_config.use_phonemes
         self.tts_model = setup_tts_model(config=self.tts_config)
 
+        if self.use_phonemes and self.tts_config["phonemizer"] is None:
+            raise ValueError("Phonemizer is not defined in the TTS config.")
+
         if not self.encoder_checkpoint:
             self._set_speaker_encoder_paths_from_tts_config()