diff --git a/generate_librimix.sh b/generate_librimix.sh
index 0599e2b..943b457 100644
--- a/generate_librimix.sh
+++ b/generate_librimix.sh
@@ -77,7 +77,7 @@ for n_src in 2; do
     --metadata_dir $metadata_dir \
     --librimix_outdir $librimix_outdir \
     --n_src $n_src \
-    --freqs 8k 16k \
-    --modes min max \
-    --types mix_clean mix_both mix_single
+    --freqs 16k \
+    --modes max \
+    --types mix_clean mix_both
 done
diff --git a/scripts/prepare_diarization.py b/scripts/prepare_diarization.py
new file mode 100644
index 0000000..0825bbd
--- /dev/null
+++ b/scripts/prepare_diarization.py
@@ -0,0 +1,109 @@
+import os
+import re
+import argparse
+
+
+def float2str(number, size=6):
+    number = str(int(number * 1000))
+    return (size - len(number)) * "0" + number
+
+
+def load_rttm_text(path):
+    # Read a RTTM file
+    spk_index = 0
+    data = {}
+    spk_dict = {}
+    with open(path, "r", encoding="utf-8") as f:
+        for linenum, line in enumerate(f, 1):
+            sps = re.split(" +", line.rstrip())
+
+            # RTTM format must have exactly 9 fields
+            assert len(sps) == 10 and path
+            label_type, utt_id, channel, start, duration, _, _, spk_id, _, _ = sps
+
+            # Only support speaker label now
+            assert label_type == "SPEAKER"
+
+            if spk_id not in spk_dict.keys():
+                spk_dict[spk_id] = spk_index
+                spk_index += 1
+            data[utt_id] = data.get(utt_id, []) + [
+                (spk_id, float(start), float(start) + float(duration))
+            ]
+
+    return data, spk_dict
+
+
+def process_metadata(metadata, target_dir, source_rttm):
+    if not os.path.exists(target_dir):
+        os.makedirs(target_dir)
+
+    wavscp = open(os.path.join(target_dir, "wav.scp"), "w", encoding="utf-8")
+    utt2spk = open(os.path.join(target_dir, "utt2spk"), "w", encoding="utf-8")
+    spk2utt = open(os.path.join(target_dir, "spk2utt"), "w", encoding="utf-8")
+    segments = open(os.path.join(target_dir, "segments"), "w", encoding="utf-8")
+    rttm = open(os.path.join(target_dir, "rttm"), "w", encoding="utf-8")
+    reco2dur = open(os.path.join(target_dir, "reco2dur"), "w", encoding="utf-8")
+
+    spk2utt_cache = {}
+
+    with open(metadata, "r", encoding="utf-8") as f:
+        header = f.readline().split(",")
+        assert len(header) == 6
+        for linenum, line in enumerate(f, 1):
+            mix_id, mix_path, _, _, _, length = line.strip().split(",")
+            # from 3536-8226-0026_1673-143397-0009
+            # to 3536-8226-0026, 1673-143397-0009
+            source1_id, source2_id = mix_id.split("_")
+            spk1, spk2 = source1_id.split("-")[0], source2_id.split("-")[0]
+            reco1, reco2 = source1_id[len(spk1) + 1:], source2_id[len(spk2) + 1:]
+            wavscp.write("{} {}\n".format(mix_id, mix_path))
+            spk1_segs, spk2_segs = source_rttm[reco1], source_rttm[reco2]
+
+            for spk_id, start, end in spk1_segs:
+                assert spk_id == spk1
+                seg_id = "{}_{}_{}".format(mix_id, float2str(start), float2str(end))
+                segments.write("{} {} {} {}\n".format(seg_id, mix_id, start, end))
+                utt2spk.write("{} {}\n".format(seg_id, spk_id))
+                rttm.write("SPEAKER\t{}\t1\t{}\t{}\t<NA>\t<NA>\t{}\t<NA>\n".format(mix_id, start, end-start, spk_id))
+                spk2utt_cache[spk_id] = spk2utt_cache.get(spk_id, []) + [mix_id]
+
+            for spk_id, start, end in spk2_segs:
+                assert spk_id == spk2
+                seg_id = "{}_{}_{}".format(mix_id, float2str(start), float2str(end))
+                segments.write("{} {} {} {}\n".format(seg_id, mix_id, start, end))
+                utt2spk.write("{} {}\n".format(seg_id, spk_id))
+                rttm.write("SPEAKER\t{}\t1\t{}\t{}\t<NA>\t<NA>\t{}\t<NA>\n".format(mix_id, start, end-start, spk_id))
+                spk2utt_cache[spk_id] = spk2utt_cache.get(spk_id, []) + [mix_id]
+
+            reco2dur.write("{} {}\n".format(mix_id, float(length) / 16000))
+
+    for spk_id in spk2utt_cache.keys():
+    	spk2utt.write("{} {}\n".format(spk_id, " ".join(spk2utt_cache[spk_id])))
+
+    wavscp.close()
+    utt2spk.close()
+    spk2utt.close()
+    segments.close()
+    rttm.close()
+    reco2dur.close()
+
+    
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--target_dir', type=str, required=True, help='Path to generate kaldi_style result')
+parser.add_argument('--source_dir', type=str, default="Libri2Mix/wav16k/max/metadata")
+parser.add_argument('--rttm_dir', type=str, default="metadata/LibriSpeech")
+
+args = parser.parse_args()
+
+train_rttm, train_spk = load_rttm_text(os.path.join(args.rttm_dir, "train_clean_100.rttm"))
+dev_rttm, dev_spk = load_rttm_text(os.path.join(args.rttm_dir, "dev_clean.rttm"))
+test_rttm, test_spk = load_rttm_text(os.path.join(args.rttm_dir, "test_clean.rttm"))
+
+process_metadata(os.path.join(args.source_dir, "mixture_train-100_mix_both.csv"), os.path.join(args.target_dir, "train"), train_rttm)
+process_metadata(os.path.join(args.source_dir, "mixture_dev_mix_both.csv"), os.path.join(args.target_dir, "dev"), dev_rttm)
+process_metadata(os.path.join(args.source_dir, "mixture_test_mix_both.csv"), os.path.join(args.target_dir, "test"), test_rttm)
+
+print("Successfully finish Kaldi-style preparation")
+