diff --git a/lasp/lasp_measurement.py b/lasp/lasp_measurement.py
index 3576f0f..53861b8 100644
--- a/lasp/lasp_measurement.py
+++ b/lasp/lasp_measurement.py
@@ -254,6 +254,7 @@ class Measurement:
             blocks = blocks.reshape(self.nblocks*self.blocksize,
                                     self.nchannels)
 
+        # Apply scaling (sensitivity, integer -> float)
         blocks = self.scaleBlock(blocks)
         return blocks
 
@@ -323,7 +324,7 @@ class Measurement:
         if os.path.exists(fn) and not force:
             raise RuntimeError(f'File already exists: {fn}')
         with self.file() as f:
-            audio = self.f['audio'][:]
+            audio = f['audio'][:]
 
         if isinstance(audio.dtype, float):
             if sampwidth is None:
diff --git a/lasp/lasp_record.py b/lasp/lasp_record.py
index 1e36dc0..d6924e6 100644
--- a/lasp/lasp_record.py
+++ b/lasp/lasp_record.py
@@ -17,6 +17,10 @@ class Recording:
     def __init__(self, fn, stream, rectime=None):
         """
 
+        Args:
+            fn: Filename to record to. extension is added
+            stream: AvStream instance to record from
+            rectime: Recording time, None for infinite
         """
         ext = '.h5'
         if ext not in fn:
@@ -58,6 +62,7 @@ class Recording:
             f.attrs['samplerate'] = stream.samplerate
             f.attrs['nchannels'] = stream.nchannels
             f.attrs['blocksize'] = stream.blocksize
+            f.attrs['sensitivity'] = stream.sensitivity
             f.attrs['time'] = time.time()
             self._running <<= True
             # Videothread is going to start
diff --git a/scripts/lasp_playback b/scripts/lasp_playback
index 333ff64..c43eaec 100755
--- a/scripts/lasp_playback
+++ b/scripts/lasp_playback
@@ -1,7 +1,11 @@
 #!/usr/bin/python
-import sys
 from lasp.lasp_playback import Playback
+import argparse
 
-fn = sys.argv[1]
-p = Playback(fn)
+parser = argparse.ArgumentParser(
+    description='Playback recorded measurement'
+)
+parser.add_argument('filename', help='Filename of measurement', type=str)
+args = parser.parse_args()
+p = Playback(args.filename)
 p.start()
diff --git a/scripts/lasp_record b/scripts/lasp_record
new file mode 100644
index 0000000..fe287bf
--- /dev/null
+++ b/scripts/lasp_record
@@ -0,0 +1,21 @@
+#!/usr/bin/python
+import argparse
+from lasp.lasp_record import Recording
+from lasp.lasp_avstream import AvStream
+
+parser = argparse.ArgumentParser(
+    description='Acquire data and store a measurement file'
+)
+parser.add_argument('filename', type=str,
+                    help='File name to record to.'
+                    ' Extension is automatically added.')
+parser.add_argument('--duration', '-d', type=float,
+                    help='The recording duration in [s]')
+parser.add_argument('--comment', '-c', type=str,
+                    help='Add a measurement comment, optionally')
+args = parser.parse_args()
+
+stream = AvStream()
+rec = Recording(args.filename, stream, args.duration)
+rec.start()
+stream.stop()