Add TTS_SPEED config for speech rate control (atempo filter in ffmpeg)

config.py

@@ -443,6 +443,7 @@ def build_config(_config_file):
         'TTS_AMBESERVER_HOST': voice_config.get(_voice_section, 'TTS_AMBESERVER_HOST', fallback='') if _has_voice else '',
         'TTS_AMBESERVER_PORT': voice_config.getint(_voice_section, 'TTS_AMBESERVER_PORT', fallback=2460) if _has_voice else 2460,
         'TTS_VOLUME': voice_config.getint(_voice_section, 'TTS_VOLUME', fallback=-3) if _has_voice else -3,
+        'TTS_SPEED': voice_config.getfloat(_voice_section, 'TTS_SPEED', fallback=1.0) if _has_voice else 1.0,
         'TTS_ANNOUNCEMENT1_ENABLED': voice_config.getboolean(_voice_section, 'TTS_ANNOUNCEMENT1_ENABLED', fallback=False) if _has_voice else False,
         'TTS_ANNOUNCEMENT1_FILE': voice_config.get(_voice_section, 'TTS_ANNOUNCEMENT1_FILE', fallback='texto1') if _has_voice else 'texto1',
         'TTS_ANNOUNCEMENT1_TG': voice_config.getint(_voice_section, 'TTS_ANNOUNCEMENT1_TG', fallback=9) if _has_voice else 9,
@@ -511,6 +512,7 @@ def reload_voice_config(CONFIG, config_file):
     _voice_keys['TTS_AMBESERVER_HOST'] = voice_config.get(_voice_section, 'TTS_AMBESERVER_HOST', fallback='')
     _voice_keys['TTS_AMBESERVER_PORT'] = voice_config.getint(_voice_section, 'TTS_AMBESERVER_PORT', fallback=2460)
     _voice_keys['TTS_VOLUME'] = voice_config.getint(_voice_section, 'TTS_VOLUME', fallback=-3)
+    _voice_keys['TTS_SPEED'] = voice_config.getfloat(_voice_section, 'TTS_SPEED', fallback=1.0)
 
     for _tts_num in range(1, 5):
         _prefix = 'TTS_ANNOUNCEMENT{}'.format(_tts_num)