diff --git a/Modem.cpp b/Modem.cpp
index 4ae573a..13d7940 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -103,6 +103,7 @@ m_rxYSFData(1000U, "Modem RX YSF"),
 m_txYSFData(1000U, "Modem TX YSF"),
 m_statusTimer(1000U, 0U, 250U),
 m_inactivityTimer(1000U, 0U, 1500U),
+m_playoutTimer(1000U, 0U, 10U),
 m_dstarSpace(0U),
 m_dmrSpace1(0U),
 m_dmrSpace2(0U),
@@ -398,6 +399,11 @@ void CModem::clock(unsigned int ms)
 		}
 	}
 
+	// Only feed data to the modem if the playout timer has expired
+	m_playoutTimer.clock(ms);
+	if (!m_playoutTimer.hasExpired())
+		return;
+
 	if (m_dstarSpace > 1U && !m_txDStarData.isEmpty()) {
 		unsigned char buffer[4U];
 		m_txDStarData.peek(buffer, 4U);
@@ -429,6 +435,8 @@ void CModem::clock(unsigned int ms)
 			int ret = m_serial.write(m_buffer, len);
 			if (ret != int(len))
 				LogWarning("Error when writing D-Star data to the MMDVM");
+
+			m_playoutTimer.start();
 		}
 	}
 
@@ -444,6 +452,8 @@ void CModem::clock(unsigned int ms)
 		if (ret != int(len))
 			LogWarning("Error when writing DMR data to the MMDVM");
 
+		m_playoutTimer.start();
+
 		m_dmrSpace1--;
 	}
 
@@ -459,6 +469,8 @@ void CModem::clock(unsigned int ms)
 		if (ret != int(len))
 			LogWarning("Error when writing DMR data to the MMDVM");
 
+		m_playoutTimer.start();
+
 		m_dmrSpace2--;
 	}
 
@@ -474,6 +486,8 @@ void CModem::clock(unsigned int ms)
 		if (ret != int(len))
 			LogWarning("Error when writing YSF data to the MMDVM");
 
+		m_playoutTimer.start();
+
 		m_ysfSpace--;
 	}
 }
@@ -802,6 +816,8 @@ bool CModem::setConfig()
 		return false;
 	}
 
+	m_playoutTimer.start();
+
 	return true;
 }
 
diff --git a/Modem.h b/Modem.h
index cb4a71b..b72aa62 100644
--- a/Modem.h
+++ b/Modem.h
@@ -100,6 +100,7 @@ private:
 	CRingBuffer<unsigned char> m_txYSFData;
 	CTimer                     m_statusTimer;
 	CTimer                     m_inactivityTimer;
+	CTimer                     m_playoutTimer;
 	unsigned int               m_dstarSpace;
 	unsigned int               m_dmrSpace1;
 	unsigned int               m_dmrSpace2;