diff --git a/src/platform/qt/AudioDevice.cpp b/src/platform/qt/AudioDevice.cpp
index 980d1f380..8d0ff8c44 100644
--- a/src/platform/qt/AudioDevice.cpp
+++ b/src/platform/qt/AudioDevice.cpp
@@ -34,6 +34,7 @@ void AudioDevice::setFormat(const QAudioFormat& format) {
 	GBASyncLockAudio(&m_context->sync);
 	blip_set_rates(m_context->gba->audio.left, GBA_ARM7TDMI_FREQUENCY, format.sampleRate() * fauxClock);
 	blip_set_rates(m_context->gba->audio.right, GBA_ARM7TDMI_FREQUENCY, format.sampleRate() * fauxClock);
+	GBASyncUnlockAudio(&m_context->sync);
 #endif
 }
 
@@ -53,6 +54,7 @@ qint64 AudioDevice::readData(char* data, qint64 maxSize) {
 #if RESAMPLE_LIBRARY == RESAMPLE_NN
 	return GBAAudioResampleNN(&m_context->gba->audio, m_ratio, &m_drift, reinterpret_cast<GBAStereoSample*>(data), maxSize / sizeof(GBAStereoSample)) * sizeof(GBAStereoSample);
 #elif RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
+	GBASyncLockAudio(&m_context->sync);
 	int available = blip_samples_avail(m_context->gba->audio.left);
 	if (available > maxSize / sizeof(GBAStereoSample)) {
 		available = maxSize / sizeof(GBAStereoSample);
diff --git a/src/platform/qt/GameController.cpp b/src/platform/qt/GameController.cpp
index c691262d3..fcbd47fe0 100644
--- a/src/platform/qt/GameController.cpp
+++ b/src/platform/qt/GameController.cpp
@@ -461,7 +461,7 @@ void GameController::clearAVStream() {
 }
 
 void GameController::reloadAudioDriver() {
-	m_audioProcessor->pause();
+	QMetaObject::invokeMethod(m_audioProcessor, "pause", Qt::BlockingQueuedConnection);
 	delete m_audioProcessor;
 	m_audioProcessor = AudioProcessor::create();
 	m_audioProcessor->moveToThread(m_audioThread);