diff --git a/pyrelacs/dataio/sin_producer.py b/pyrelacs/dataio/sin_producer.py
index a47da41..216c415 100644
--- a/pyrelacs/dataio/sin_producer.py
+++ b/pyrelacs/dataio/sin_producer.py
@@ -32,10 +32,8 @@ class SinProducer:
         log.debug("producing Sin")
         start_time = time.time()
         t = 0
-        while time.time() - start_time < 2:
-
+        while time.time() - start_time < 20:
             s = AMPLITUDE * np.sin(2 * np.pi * FREQUENCY * t)
-
             self.buffer.append(s)
             t += 1 / self.buffer.samplerate
             time.sleep(1 / self.buffer.samplerate)