diff --git a/app/audio/audiomanager.cpp b/app/audio/audiomanager.cpp
index 25b871b37..433efbbe6 100644
--- a/app/audio/audiomanager.cpp
+++ b/app/audio/audiomanager.cpp
@@ -48,21 +48,6 @@ AudioManager *AudioManager::instance()
 
 void AudioManager::RefreshDevices()
 {
-  if (!is_refreshing_outputs_) {
-    QFutureWatcher< QList<QAudioDeviceInfo> >* output_watcher = new QFutureWatcher< QList<QAudioDeviceInfo> >();
-    connect(output_watcher, &QFutureWatcher< QList<QAudioDeviceInfo> >::finished, this, &AudioManager::OutputDevicesRefreshed);
-    output_watcher->setFuture(QtConcurrent::run(QAudioDeviceInfo::availableDevices, QAudio::AudioOutput));
-
-    is_refreshing_outputs_ = true;
-  }
-
-  if (!is_refreshing_inputs_) {
-    QFutureWatcher< QList<QAudioDeviceInfo> >* input_watcher = new QFutureWatcher< QList<QAudioDeviceInfo> >();
-    connect(input_watcher, &QFutureWatcher< QList<QAudioDeviceInfo> >::finished, this, &AudioManager::InputDevicesRefreshed);
-    input_watcher->setFuture(QtConcurrent::run(QAudioDeviceInfo::availableDevices, QAudio::AudioInput));
-
-    is_refreshing_inputs_ = true;
-  }
 }
 
 bool AudioManager::IsRefreshingOutputs()
@@ -209,16 +194,6 @@ void AudioManager::SetInputDevice(PaDeviceIndex device)
   input_device_ = device;
 }
 
-const QList<QAudioDeviceInfo> &AudioManager::ListInputDevices()
-{
-  return input_devices_;
-}
-
-const QList<QAudioDeviceInfo> &AudioManager::ListOutputDevices()
-{
-  return output_devices_;
-}
-
 AudioManager::AudioManager() :
   is_refreshing_inputs_(false),
   is_refreshing_outputs_(false),
diff --git a/app/audio/audiomanager.h b/app/audio/audiomanager.h
index 7c2fa9882..ca0f2429e 100644
--- a/app/audio/audiomanager.h
+++ b/app/audio/audiomanager.h
@@ -22,7 +22,6 @@
 #define AUDIOMANAGER_H
 
 #include <memory>
-#include <QAudioInput>
 #include <QtConcurrent/QtConcurrent>
 #include <QThread>
 #include <portaudio.h>
@@ -68,9 +67,6 @@ public:
 
   void SetInputDevice(PaDeviceIndex device);
 
-  const QList<QAudioDeviceInfo>& ListInputDevices();
-  const QList<QAudioDeviceInfo>& ListOutputDevices();
-
 signals:
   void OutputListReady();
 
@@ -87,9 +83,6 @@ private:
 
   void CloseOutputStream();
 
-  QList<QAudioDeviceInfo> input_devices_;
-  QList<QAudioDeviceInfo> output_devices_;
-
   bool is_refreshing_inputs_;
   bool is_refreshing_outputs_;
 
diff --git a/app/common/CMakeLists.txt b/app/common/CMakeLists.txt
index 2dd2eaf62..2938ad229 100644
--- a/app/common/CMakeLists.txt
+++ b/app/common/CMakeLists.txt
@@ -28,6 +28,7 @@ set(OLIVE_SOURCES
   common/crashpadutils.h
   common/debug.cpp
   common/debug.h
+  common/decibel.h
   common/define.h
   common/ffmpegutils.cpp
   common/ffmpegutils.h
diff --git a/app/common/decibel.h b/app/common/decibel.h
new file mode 100644
index 000000000..61d57f276
--- /dev/null
+++ b/app/common/decibel.h
@@ -0,0 +1,89 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2021 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef DECIBEL_H
+#define DECIBEL_H
+
+#include <QtGlobal>
+#include <cmath>
+
+namespace olive {
+
+class Decibel
+{
+public:
+  static double fromLinear(double linear)
+  {
+    return double(20.0) * std::log10(linear);
+  }
+
+  static double toLinear(double decibel)
+  {
+    double to_linear = std::pow(double(10.0), decibel / double(20.0));
+
+    // Minimum threshold that we figure is close enough to 0 that we may as well just return 0
+    if (to_linear < 0.000001) {
+      return 0;
+    } else {
+      return to_linear;
+    }
+  }
+
+  static double fromLogarithmic(double logarithmic)
+  {
+    if (logarithmic < 0.001)
+      return -200.0;
+    else if (logarithmic > 0.99)
+      return 0;
+    else
+      return 20.0 * std::log10(-std::log(1 - logarithmic) / LOG100);
+  }
+
+  static double toLogarithmic(double decibel)
+  {
+    if (qFuzzyIsNull(decibel)) {
+      return 1;
+    } else {
+      return 1 - std::exp(-std::pow(10.0, decibel / 20.0) * LOG100);
+    }
+  }
+
+  static double LinearToLogarithmic(double linear)
+  {
+    return 1 - std::exp(-linear * LOG100);
+  }
+
+  static double LogarithmicToLinear(double logarithmic)
+  {
+    if (logarithmic > 0.99) {
+      return 1;
+    } else {
+      return -std::log(1 - logarithmic) / LOG100;
+    }
+  }
+
+private:
+  static constexpr double LOG100 = 4.60517018599;
+
+};
+
+}
+
+#endif // DECIBEL_H
diff --git a/app/dialog/preferences/tabs/preferencesaudiotab.cpp b/app/dialog/preferences/tabs/preferencesaudiotab.cpp
index 57c3027b5..4c0d4536b 100644
--- a/app/dialog/preferences/tabs/preferencesaudiotab.cpp
+++ b/app/dialog/preferences/tabs/preferencesaudiotab.cpp
@@ -179,20 +179,20 @@ void PreferencesAudioTab::RefreshDevices()
 
 void PreferencesAudioTab::RetrieveOutputList()
 {
-  PopulateComboBox(audio_output_devices_,
+  /*PopulateComboBox(audio_output_devices_,
                    AudioManager::instance()->IsRefreshingOutputs(),
                    AudioManager::instance()->ListOutputDevices(),
-                   Config::Current()["AudioOutput"].toString());
+                   Config::Current()["AudioOutput"].toString());*/
 
   UpdateRefreshButtonEnabled();
 }
 
 void PreferencesAudioTab::RetrieveInputList()
 {
-  PopulateComboBox(audio_input_devices_,
+  /*PopulateComboBox(audio_input_devices_,
                    AudioManager::instance()->IsRefreshingInputs(),
                    AudioManager::instance()->ListInputDevices(),
-                   Config::Current()["AudioInput"].toString());
+                   Config::Current()["AudioInput"].toString());*/
 
   UpdateRefreshButtonEnabled();
 }
@@ -209,7 +209,7 @@ void PreferencesAudioTab::UpdateRefreshButtonEnabled()
                                    && audio_input_devices_->isEnabled());
 }
 
-void PreferencesAudioTab::PopulateComboBox(QComboBox *cb, bool still_refreshing, const QList<QAudioDeviceInfo> &list, const QString& preferred)
+/*void PreferencesAudioTab::PopulateComboBox(QComboBox *cb, bool still_refreshing, const QList<QAudioDeviceInfo> &list, const QString& preferred)
 {
   cb->clear();
 
@@ -237,6 +237,6 @@ void PreferencesAudioTab::PopulateComboBox(QComboBox *cb, bool still_refreshing,
     }
 
   }
-}
+}*/
 
 }
diff --git a/app/dialog/preferences/tabs/preferencesaudiotab.h b/app/dialog/preferences/tabs/preferencesaudiotab.h
index 740d4a602..b2cbcbd34 100644
--- a/app/dialog/preferences/tabs/preferencesaudiotab.h
+++ b/app/dialog/preferences/tabs/preferencesaudiotab.h
@@ -21,7 +21,6 @@
 #ifndef PREFERENCESAUDIOTAB_H
 #define PREFERENCESAUDIOTAB_H
 
-#include <QAudioDeviceInfo>
 #include <QComboBox>
 #include <QPushButton>
 
@@ -72,7 +71,7 @@ private:
 
   void UpdateRefreshButtonEnabled();
 
-  static void PopulateComboBox(QComboBox* cb, bool still_refreshing, const QList<QAudioDeviceInfo>& list, const QString &preferred);
+  //static void PopulateComboBox(QComboBox* cb, bool still_refreshing, const QList<QAudioDeviceInfo>& list, const QString &preferred);
 
 };
 
diff --git a/app/render/audioparams.cpp b/app/render/audioparams.cpp
index 1654ef084..24246429b 100644
--- a/app/render/audioparams.cpp
+++ b/app/render/audioparams.cpp
@@ -67,26 +67,6 @@ bool AudioParams::operator!=(const AudioParams &other) const
   return !(*this == other);
 }
 
-QAudioFormat::SampleType AudioParams::GetQtSampleType(AudioParams::Format format)
-{
-  switch (format) {
-  case kFormatUnsigned8:
-    return QAudioFormat::UnSignedInt;
-  case kFormatSigned16:
-  case kFormatSigned32:
-  case kFormatSigned64:
-    return QAudioFormat::SignedInt;
-  case kFormatFloat32:
-  case kFormatFloat64:
-    return QAudioFormat::Float;
-  case kFormatInvalid:
-  case kFormatCount:
-    break;
-  }
-
-  return QAudioFormat::Unknown;
-}
-
 qint64 AudioParams::time_to_bytes(const double &time) const
 {
   return time_to_bytes_per_channel(time) * channel_count();
diff --git a/app/render/audioparams.h b/app/render/audioparams.h
index d28105c40..a8f5f1496 100644
--- a/app/render/audioparams.h
+++ b/app/render/audioparams.h
@@ -21,7 +21,6 @@
 #ifndef AUDIOPARAMS_H
 #define AUDIOPARAMS_H
 
-#include <QAudioFormat>
 #include <QtMath>
 #include <QXmlStreamReader>
 #include <QXmlStreamWriter>
@@ -184,8 +183,6 @@ public:
   bool operator==(const AudioParams& other) const;
   bool operator!=(const AudioParams& other) const;
 
-  static QAudioFormat::SampleType GetQtSampleType(Format format);
-
   static const QVector<uint64_t> kSupportedChannelLayouts;
   static const QVector<int> kSupportedSampleRates;
 
diff --git a/app/widget/audiomonitor/audiomonitor.cpp b/app/widget/audiomonitor/audiomonitor.cpp
index d2285ecc8..c95e5c7b6 100644
--- a/app/widget/audiomonitor/audiomonitor.cpp
+++ b/app/widget/audiomonitor/audiomonitor.cpp
@@ -20,11 +20,11 @@
 
 #include "audiomonitor.h"
 
-#include <QAudio>
 #include <QDebug>
 #include <QPainter>
 
 #include "audio/audiomanager.h"
+#include "common/decibel.h"
 #include "common/qtutils.h"
 
 namespace olive {
@@ -170,7 +170,7 @@ void AudioMonitor::paintGL()
           db_label = QStringLiteral("%1").arg(i);
         }
 
-        qreal log_val = QAudio::convertVolume(i, QAudio::DecibelVolumeScale, QAudio::LogarithmicVolumeScale);
+        qreal log_val = Decibel::toLogarithmic(i);
 
         QRect db_marking_rect = db_labels_rect;
         db_marking_rect.adjust(0, db_labels_rect.height() - qRound(log_val * db_labels_rect.height()), 0, 0);
@@ -278,7 +278,7 @@ void AudioMonitor::paintGL()
     }
 
     // Convert val to logarithmic scale
-    vol = QAudio::convertVolume(vol, QAudio::LinearVolumeScale, QAudio::LogarithmicVolumeScale);
+    vol = Decibel::LinearToLogarithmic(vol);
 
     meter_rect.adjust(0, 0, 0, -qRound(meter_rect.height() * vol));
     p.drawRect(meter_rect);
diff --git a/app/widget/slider/floatslider.cpp b/app/widget/slider/floatslider.cpp
index ad460347e..39c00f686 100644
--- a/app/widget/slider/floatslider.cpp
+++ b/app/widget/slider/floatslider.cpp
@@ -21,9 +21,10 @@
 #include "floatslider.h"
 
 #include <cmath>
-#include <QAudio>
 #include <QDebug>
 
+#include "common/decibel.h"
+
 namespace olive {
 
 #define super DecimalSliderBase
@@ -91,7 +92,7 @@ QString FloatSlider::ValueToString(double val, FloatSlider::DisplayType display,
       return tr("\xE2\x88\x9E");
     }
 
-    val = LinearToDecibel(val);
+    val = Decibel::fromLinear(val);
     break;
   case kPercentage:
     // Multiply value by 100 for user-friendly percentage
@@ -124,7 +125,7 @@ QVariant FloatSlider::StringToValue(const QString &s, bool *ok) const
 
     if (valid) {
       // Convert from decibel scale to linear decimal
-      return DecibelToLinear(decibels);
+      return Decibel::toLinear(decibels);
     }
 
     break;
@@ -159,9 +160,9 @@ QVariant FloatSlider::AdjustDragDistanceInternal(const QVariant &start, const do
     break;
   case kDecibel:
   {
-    double current_db = LinearToDecibel(start.toDouble());
+    double current_db = Decibel::fromLinear(start.toDouble());
     current_db += drag;
-    double adjusted_linear = DecibelToLinear(current_db);
+    double adjusted_linear = Decibel::toLinear(current_db);
 
     return adjusted_linear;
   }
@@ -177,21 +178,4 @@ void FloatSlider::ValueSignalEvent(const QVariant &value)
   emit ValueChanged(value.toDouble());
 }
 
-double FloatSlider::LinearToDecibel(double linear)
-{
-  return double(20.0) * std::log10(linear);
-}
-
-double FloatSlider::DecibelToLinear(double decibel)
-{
-  double to_linear = std::pow(double(10.0), decibel / double(20.0));
-
-  // Minimum threshold that we figure is close enough to 0 that we may as well just return 0
-  if (to_linear < 0.000001) {
-    return 0;
-  } else {
-    return to_linear;
-  }
-}
-
 }
diff --git a/app/widget/slider/floatslider.h b/app/widget/slider/floatslider.h
index 179a7a45e..4000e41bd 100644
--- a/app/widget/slider/floatslider.h
+++ b/app/widget/slider/floatslider.h
@@ -64,10 +64,6 @@ signals:
   void ValueChanged(double);
 
 private:
-  static double LinearToDecibel(double linear);
-
-  static double DecibelToLinear(double decibel);
-
   DisplayType display_type_;
 
 };
diff --git a/app/widget/viewer/viewer.cpp b/app/widget/viewer/viewer.cpp
index 4888a14e5..6fd75f5db 100644
--- a/app/widget/viewer/viewer.cpp
+++ b/app/widget/viewer/viewer.cpp
@@ -48,7 +48,9 @@ namespace olive {
 #define super TimeBasedWidget
 
 QVector<ViewerWidget*> ViewerWidget::instances_;
-const int ViewerWidget::kAudioPlaybackInterval = 2;
+
+// NOTE: Hardcoded interval of size of audio chunk to render and send to the output at a time
+const rational ViewerWidget::kAudioPlaybackInterval = rational(1, 8);
 
 const int kMaxPreQueueSize = 8;
 
diff --git a/app/widget/viewer/viewer.h b/app/widget/viewer/viewer.h
index c8c100d6a..2766cca8d 100644
--- a/app/widget/viewer/viewer.h
+++ b/app/widget/viewer/viewer.h
@@ -219,7 +219,7 @@ private:
 
   ViewerSizer* sizer_;
 
-  QAtomicInt playback_speed_;
+  int playback_speed_;
 
   rational last_time_;
 
@@ -261,7 +261,7 @@ private:
   PackedProcessor packed_processor_;
   TempoProcessor tempo_processor_;
   QByteArray prequeued_audio_;
-  static const int kAudioPlaybackInterval;
+  static const rational kAudioPlaybackInterval;
 
   static QVector<ViewerWidget*> instances_;