diff --git a/audiolib.py b/audiolib.py
index cd999efe..ad0ec248 100644
--- a/audiolib.py
+++ b/audiolib.py
@@ -65,7 +65,7 @@ def snr_mixer(clean, noise, snr):
     rmsnoise = (noise**2).mean()**0.5
     
     # Set the noise level for a given SNR
-    noisescalar = np.sqrt(rmsclean / (10**(snr/20)) / rmsnoise)
+    noisescalar = rmsclean / (10**(snr/20)) / rmsnoise
     noisenewlevel = noise * noisescalar
     noisyspeech = clean + noisenewlevel
     return clean, noisenewlevel, noisyspeech
diff --git a/noisyspeech_synthesizer.cfg b/noisyspeech_synthesizer.cfg
index 71992c01..5ea8c513 100644
--- a/noisyspeech_synthesizer.cfg
+++ b/noisyspeech_synthesizer.cfg
@@ -21,8 +21,8 @@ audio_length: 10
 silence_length: 0.2
 total_hours: 1 
 snr_lower: 0
-snr_upper: 40
-total_snrlevels: 5  
+snr_upper: 20
+total_snrlevels: 5
 
 noise_dir: None
 speech_dir: None
diff --git a/noisyspeech_synthesizer.py b/noisyspeech_synthesizer.py
index 86c136e1..6874a9ca 100644
--- a/noisyspeech_synthesizer.py
+++ b/noisyspeech_synthesizer.py
@@ -12,7 +12,7 @@
 def main(cfg):
     snr_lower = float(cfg["snr_lower"])
     snr_upper = float(cfg["snr_upper"])
-    total_snrlevels = float(cfg["total_snrlevels"])
+    total_snrlevels = int(cfg["total_snrlevels"])
     
     clean_dir = os.path.join(os.path.dirname(__file__), 'clean_train')
     if cfg["speech_dir"]!='None':
diff --git a/requirements.txt b/requirements.txt
index 26a7ee99..b74458bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-numpy==1.22.4
-glob2==0.7
-soundfile==0.11.0
-scipy==1.6.2
-configparser==5.3.0
+numpy
+glob2
+soundfile
+scipy
+configparser
\ No newline at end of file