diff --git a/src/channelmanager.cpp b/src/channelmanager.cpp
--- a/src/channelmanager.cpp
+++ b/src/channelmanager.cpp
@@ -30,6 +30,7 @@ ChannelManager::ChannelManager(unsigned 
 {
     _numOfChannels = numberOfChannels;
     _numOfSamples = numberOfSamples;
+    _paused = false;
 
     for (unsigned int i = 0; i < numberOfChannels; i++)
     {
@@ -97,6 +98,11 @@ void ChannelManager::setNumOfSamples(uns
     emit numOfSamplesChanged(number);
 }
 
+void ChannelManager::pause(bool paused)
+{
+    _paused = paused;
+}
+
 FrameBuffer* ChannelManager::channelBuffer(unsigned channel)
 {
     return channelBuffers[channel];
@@ -165,6 +171,8 @@ void ChannelManager::addData(double* dat
 {
     Q_ASSERT(size % _numOfChannels == 0);
 
+    if (_paused) return;
+
     int n = size / _numOfChannels;
     for (unsigned ci = 0; ci < _numOfChannels; ci++)
     {