diff --git a/open_dubbing/dubbing.py b/open_dubbing/dubbing.py
index 32cbf99..4cc2a4d 100644
--- a/open_dubbing/dubbing.py
+++ b/open_dubbing/dubbing.py
@@ -125,6 +125,7 @@ def __init__(
         self._number_of_steps = number_of_steps
         self.tts = tts
         self.device = device
+        self.cpu_threads = cpu_threads
 
     @functools.cached_property
     def input_file(self):
diff --git a/open_dubbing/main.py b/open_dubbing/main.py
index fdf2a49..59f09ec 100644
--- a/open_dubbing/main.py
+++ b/open_dubbing/main.py
@@ -173,7 +173,7 @@ def main():
         help=("Device to use"),
     )
     parser.add_argument(
-        "--cpu-threads",
+        "--cpu_threads",
         type=int,
         default=0,
         help="number of threads used for CPU inference (if not specified uses defaults for each framework)",
diff --git a/open_dubbing/speech_to_text.py b/open_dubbing/speech_to_text.py
index 80cefdb..cfc02a7 100644
--- a/open_dubbing/speech_to_text.py
+++ b/open_dubbing/speech_to_text.py
@@ -20,9 +20,10 @@
 
 class SpeechToText:
 
-    def __init__(self, device="cpu"):
+    def __init__(self, device="cpu", cpu_threads=0):
         self.model = None
         self.device = device
+        self.cpu_threads = cpu_threads
         logging.getLogger("faster_whisper").setLevel(logging.ERROR)
 
     @property
@@ -37,6 +38,7 @@ def load_model(self):
         self._model = WhisperModel(
             model_size_or_path="large-v3",
             device=self.device,
+            cpu_threads=self.cpu_threads,
             compute_type="float16" if self.device == "cuda" else "int8",
         )
 
diff --git a/r.sh b/r.sh
index 07629a5..89a0efc 100755
--- a/r.sh
+++ b/r.sh
@@ -4,7 +4,7 @@ rm -r -f output/
 
 declare -a inputs=("videos/cameratips.mp4" "videos/jordi.mp4" "videos/jobinterview.mp4" "videos/jordimaskudosallhands.mp4" "videos/michael.mp4" "videos/simplicty.mp4")
 declare -a target_languages=("cat")  # Catalan (cat) and French (fra)
-declare -a tts_list=("mms")
+declare -a tts_list=("coqui")
 declare -a inputs=("videos/jordimaskudosallhands.mp4")
 
 for tts in "${tts_list[@]}"; do
@@ -20,7 +20,8 @@ for tts in "${tts_list[@]}"; do
           --source_language=eng \
           --target_language="$language" \
           --tts="$tts" \
-          --device=cpu
+          --device=cpu \
+          --cpu_threads=8
       done
     done
 done