Update app.py

app.py

@@ -1,6 +1,5 @@
 import os, time, urllib.request
-NCPU = os.cpu_count() or 2
-os.environ["OMP_NUM_THREADS"] = str(NCPU)
+os.environ["OMP_NUM_THREADS"] = "1"
 
 BASE = "https://raw.githubusercontent.com/OpenMOSS/MOSS-TTS-Nano/main"
 for fn in ["onnx_tts_runtime.py", "ort_cpu_runtime.py",
@@ -26,7 +25,7 @@ VOICES = ["Junhao","Zhiming","Weiguo","Xiaoyu","Yuewen","Lingyu","Trump","Ava","
 def get_rt():
     global RT
     if RT is None:
-        RT = OnnxTtsRuntime(os.environ.get("MOSS_MODEL_DIR", "models"), thread_count=NCPU, execution_provider="cpu")
+        RT = OnnxTtsRuntime(os.environ.get("MOSS_MODEL_DIR", "models"), thread_count=1, execution_provider="cpu")
     return RT
 
 def synth(text, voice, ref, smode, mf, seed, at, ak, ap, ar):