Update app.py

app.py

@@ -15,8 +15,11 @@ def index():
 def voicevox_resp():
     text = request.args.get("text")
     speaker = request.args.get("speaker")
-    if not text:
+    if text is None:
         return jsonify({'error': "Please provided parameter 'text'"}), 400
+    if speaker is None:
+        speaker = 1
+
 
     try:
         data = voicevox(text, speaker=speaker)