diff --git a/FMCTCSSTX.cpp b/FMCTCSSTX.cpp
index 4c92577..c2fb2c7 100644
--- a/FMCTCSSTX.cpp
+++ b/FMCTCSSTX.cpp
@@ -118,7 +118,7 @@ uint8_t CFMCTCSSTX::setParams(uint8_t frequency, uint8_t level)
 void CFMCTCSSTX::getAudio(q15_t* samples, uint8_t length)
 {
   for (uint8_t i = 0U; i < length; i++) {
-    samples[i] = m_values[m_n];
+    samples[i] += m_values[m_n];
 
     m_n++;
     if (m_n >= m_length)