diff --git a/raspberry.md b/raspberry.md
index 2acef54..e397354 100644
--- a/raspberry.md
+++ b/raspberry.md
@@ -1,7 +1,7 @@
 ## connect via SSH
 
 
-# 
+# Useful commands
  - see connected usb devices
    - lsusb
  - arecord -l
@@ -24,3 +24,10 @@ pcm.mic {
     pcm "hw:1,0"
   }
 }
+
+
+44200 sampling rate
+5 secs
+230000 array length
+
+
diff --git a/src/record_sound.py b/src/record_sound.py
index 34730a5..7257bfb 100644
--- a/src/record_sound.py
+++ b/src/record_sound.py
@@ -1,15 +1,15 @@
 from numpy import*
 from scipy.io.wavfile import read
 from scipy.io.wavfile import write
-import matplotlib.pyplot as plt
+# import matplotlib.pyplot as plt
 import scipy
 import sounddevice as sd
 import time
 
-a = read("/home/jreinking/Projekte/doorbell/raspberry-pi-projects/res/klingel_aufnahme_microphne_cut.wav")
+# a = read("/home/jreinking/Projekte/doorbell/raspberry-pi-projects/res/klingel_aufnahme_microphne_cut.wav")
 # print(a)
 # print(len(a[1]))
-a = a[1]
+# a = a[1]
 
 def chunks(lst, n):
   """Yield successive n-sized chunks from lst."""