python/demos/demo_pysoundcard_record.py: normalize downmixed signal

diff --git a/python/demos/demo_pysoundcard_record.py b/python/demos/demo_pysoundcard_record.py
index ff9815c..56a7fbc 100755 (executable)
--- a/python/demos/demo_pysoundcard_record.py
+++ b/python/demos/demo_pysoundcard_record.py
@@ -16,9 +16,9 @@ def record_sink(sink_path):
     while total_frames < duration * s.sample_rate:
         vec = s.read(hop_size)
         # mix down to mono
-        mono_vec = vec.sum(-1)
+        mono_vec = vec.sum(-1) / float(s.input_channels)
         g(mono_vec, hop_size)
-        total_frames += hop_size 
+        total_frames += hop_size
     s.stop()
 
 if __name__ == '__main__':