diff --git a/src/miniaudioengine.cpp b/src/miniaudioengine.cpp
index ae74043..6fb6709 100644
--- a/src/miniaudioengine.cpp
+++ b/src/miniaudioengine.cpp
@@ -48,7 +48,7 @@ ma_result MiniAudioEngine::startDevice(int id)
     deviceConfig.pUserData          = &engine;
     result = ma_device_init(&context, &deviceConfig, &device);
     if (result != MA_SUCCESS) {
-        printf("Failed to initialize audio device %s.", pPlaybackDeviceInfos[id].name);
+        qCritical("Failed to initialize audio device %s.", pPlaybackDeviceInfos[id].name);
         return result;
     }
     engineConfig = ma_engine_config_init();
@@ -57,16 +57,16 @@ ma_result MiniAudioEngine::startDevice(int id)
     engineConfig.noAutoStart      = MA_TRUE;
     result = ma_engine_init(NULL, &engine);
     if (result != MA_SUCCESS) {
-        printf("Failed to initialize audio engine.");
+        qCritical("Failed to initialize audio engine.");
         return result;
     }
     result = ma_engine_start(&engine);
     if (result != MA_SUCCESS) {
-        printf("Failed to start audio engine %i.", id);
+        qCritical("Failed to start audio engine %i.", id);
         return result;
     }
     iChosenDevice = id;
-    printf("Initialized audio device %d: %s", id, pPlaybackDeviceInfos[id].name);
+    qInfo("Initialized audio device %d: %s", id, pPlaybackDeviceInfos[id].name);
     return result;
 }
 
@@ -81,12 +81,12 @@ ma_result MiniAudioEngine::startContext()
     resourceManagerConfig.jobThreadCount    = 0;
     result = ma_resource_manager_init(&resourceManagerConfig, &resourceManager);
     if (result != MA_SUCCESS) {
-        printf("Failed to initialize audio resource manager.");
+        qCritical("Failed to initialize audio resource manager.");
         return result;
     }
     result = ma_context_init(NULL, 0, NULL, &context);
     if (result != MA_SUCCESS) {
-        printf("Failed to initialize audio context.");
+        qCritical("Failed to initialize audio context.");
     }
     return result;
 }
@@ -98,7 +98,7 @@ ma_result MiniAudioEngine::getAllAudioDevices()
 
     result = ma_context_get_devices(&context, &pPlaybackDeviceInfos, &playbackDeviceCount, NULL, NULL);
     if (result != MA_SUCCESS) {
-        printf("Failed to enumerate playback devices.\n");
+        qWarning("Failed to enumerate playback devices.\n");
         ma_context_uninit(&context);
         return result;
     }
@@ -246,6 +246,4 @@ void MiniAudioEngine::setCursor(int layer, int cursor)
     ma_sound_get_length_in_pcm_frames(&m_currentSound[layer], &f);
     f = (cursor * f) / 65025;
     ma_sound_seek_to_pcm_frame(&m_currentSound[layer], f);
-    //ma_sound_set_start_time_in_pcm_frames(&m_currentSound[layer], f);
-    //ma_data_source_set_range_in_pcm_frames(&m_currentSound[layer], f, total);
 }