diff --git a/api/controllers/console/app/audio.py b/api/controllers/console/app/audio.py
index 29d89ae460..aa10eb52fa 100644
--- a/api/controllers/console/app/audio.py
+++ b/api/controllers/console/app/audio.py
@@ -85,7 +85,7 @@ class ChatMessageTextApi(Resource):
             response = AudioService.transcript_tts(
                 app_model=app_model,
                 text=request.form['text'],
-                voice=request.form.get('voice'),
+                voice=request.form['voice'] if request.form.get('voice') else app_model.app_model_config.text_to_speech_dict.get('voice'),
                 streaming=False
             )
 
diff --git a/api/controllers/console/explore/audio.py b/api/controllers/console/explore/audio.py
index f03663f1a2..d869cd38ed 100644
--- a/api/controllers/console/explore/audio.py
+++ b/api/controllers/console/explore/audio.py
@@ -76,7 +76,7 @@ class ChatTextApi(InstalledAppResource):
             response = AudioService.transcript_tts(
                 app_model=app_model,
                 text=request.form['text'],
-                voice=request.form.get('voice'),
+                voice=request.form['voice'] if request.form.get('voice') else app_model.app_model_config.text_to_speech_dict.get('voice'),
                 streaming=False
             )
             return {'data': response.data.decode('latin1')}
diff --git a/api/controllers/web/audio.py b/api/controllers/web/audio.py
index e0074c452f..ca6d774e9d 100644
--- a/api/controllers/web/audio.py
+++ b/api/controllers/web/audio.py
@@ -74,7 +74,7 @@ class TextApi(WebApiResource):
                 app_model=app_model,
                 text=request.form['text'],
                 end_user=end_user.external_user_id,
-                voice=request.form.get('voice'),
+                voice=request.form['voice'] if request.form.get('voice') else app_model.app_model_config.text_to_speech_dict.get('voice'),
                 streaming=False
             )