diff --git a/paddlespeech/t2s/exps/diffsinger/preprocess.py b/paddlespeech/t2s/exps/diffsinger/preprocess.py
index be526eff1..a60ad44d2 100644
--- a/paddlespeech/t2s/exps/diffsinger/preprocess.py
+++ b/paddlespeech/t2s/exps/diffsinger/preprocess.py
@@ -354,6 +354,7 @@ def main():
             mel_extractor=mel_extractor,
             pitch_extractor=pitch_extractor,
             energy_extractor=energy_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             spk_emb_dir=spk_emb_dir,
             write_metadata_method=args.write_metadata_method)
diff --git a/paddlespeech/t2s/exps/ernie_sat/preprocess.py b/paddlespeech/t2s/exps/ernie_sat/preprocess.py
index 486ed13a5..04bbc0743 100644
--- a/paddlespeech/t2s/exps/ernie_sat/preprocess.py
+++ b/paddlespeech/t2s/exps/ernie_sat/preprocess.py
@@ -324,6 +324,7 @@ def main():
             sentences=sentences,
             output_dir=dev_dump_dir,
             mel_extractor=mel_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             spk_emb_dir=spk_emb_dir)
     if test_wav_files:
diff --git a/paddlespeech/t2s/exps/fastspeech2/preprocess.py b/paddlespeech/t2s/exps/fastspeech2/preprocess.py
index 521b9a880..a2353242b 100644
--- a/paddlespeech/t2s/exps/fastspeech2/preprocess.py
+++ b/paddlespeech/t2s/exps/fastspeech2/preprocess.py
@@ -382,6 +382,7 @@ def main():
             mel_extractor=mel_extractor,
             pitch_extractor=pitch_extractor,
             energy_extractor=energy_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             spk_emb_dir=spk_emb_dir,
             write_metadata_method=args.write_metadata_method)
diff --git a/paddlespeech/t2s/exps/speedyspeech/preprocess.py b/paddlespeech/t2s/exps/speedyspeech/preprocess.py
index e4084c142..75a1b0791 100644
--- a/paddlespeech/t2s/exps/speedyspeech/preprocess.py
+++ b/paddlespeech/t2s/exps/speedyspeech/preprocess.py
@@ -280,6 +280,7 @@ def main():
             sentences=sentences,
             output_dir=dev_dump_dir,
             mel_extractor=mel_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             use_relative_path=args.use_relative_path)
     if test_wav_files:
diff --git a/paddlespeech/t2s/exps/tacotron2/preprocess.py b/paddlespeech/t2s/exps/tacotron2/preprocess.py
index c27b9769b..46b725916 100644
--- a/paddlespeech/t2s/exps/tacotron2/preprocess.py
+++ b/paddlespeech/t2s/exps/tacotron2/preprocess.py
@@ -311,6 +311,7 @@ def main():
             sentences=sentences,
             output_dir=dev_dump_dir,
             mel_extractor=mel_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             spk_emb_dir=spk_emb_dir)
     if test_wav_files:
diff --git a/paddlespeech/t2s/exps/vits/preprocess.py b/paddlespeech/t2s/exps/vits/preprocess.py
index d6b226a20..23c959d43 100644
--- a/paddlespeech/t2s/exps/vits/preprocess.py
+++ b/paddlespeech/t2s/exps/vits/preprocess.py
@@ -321,6 +321,7 @@ def main():
             sentences=sentences,
             output_dir=dev_dump_dir,
             spec_extractor=spec_extractor,
+            nprocs=args.num_cpu,
             cut_sil=args.cut_sil,
             spk_emb_dir=spk_emb_dir)
     if test_wav_files: