Preliminary support for projects with 4/6 audio channels

src/audiomixer/audiolevelwidget.cpp

@@ -34,7 +34,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 AudioLevelWidget::AudioLevelWidget(int width, QWidget *parent)
     : QWidget(parent)
-    , audioChannels(2)
+    , audioChannels(pCore->audioChannels())
     , m_width(width)
     , m_channelWidth(width / 2)
     , m_channelDistance(2)
@@ -80,7 +80,7 @@ void AudioLevelWidget::drawBackground(int channels)
         return;
     }
     m_offset = fontMetrics().boundingRect(QStringLiteral("-45")).width() + 5;
-    newSize.setWidth(newSize.width() - m_offset);
+    newSize.setWidth(newSize.width() - m_offset - 1);
     QLinearGradient gradient(0, newSize.height(), 0, 0);
     gradient.setColorAt(0.0, Qt::darkGreen);
     gradient.setColorAt(0.379, Qt::darkGreen);
@@ -130,7 +130,7 @@ void AudioLevelWidget::drawBackground(int channels)
     }
     p.setOpacity(isEnabled() ? 1 : 0.5);
     p.setPen(palette().dark().color());
-    // Clear space between the 2 channels
+    // Clear space between the channels
     p.setCompositionMode(QPainter::CompositionMode_Source);
     if (m_channelWidth < 4) {
         // too many audio channels, simple line between channels

src/audiomixer/mixerwidget.cpp

@@ -86,7 +86,12 @@ void MixerWidget::property_changed( mlt_service , MixerWidget *widget, char *nam
         mlt_properties filter_props = MLT_FILTER_PROPERTIES( widget->m_monitorFilter->get_filter());
         int pos = mlt_properties_get_int(filter_props, "_position");
         if (!widget->m_levels.contains(pos)) {
-            widget->m_levels[pos] = {IEC_Scale(mlt_properties_get_double(filter_props, "_audio_level.0")), IEC_Scale(mlt_properties_get_double(filter_props, "_audio_level.1"))};
+            QVector<double> levels;
+            for (int i = 0; i < widget->m_channels; i++) {
+                levels << IEC_Scale(mlt_properties_get_double(filter_props, QString("_audio_level.%1").arg(i).toUtf8().constData()));
+            }
+            widget->m_levels[pos] = std::move(levels);
+            //{IEC_Scale(mlt_properties_get_double(filter_props, "_audio_level.0")), IEC_Scale(mlt_properties_get_double(filter_props, "_audio_level.1"))};
             if (widget->m_levels.size() > widget->m_maxLevels) {
                 widget->m_levels.erase(widget->m_levels.begin());
             }
@@ -101,6 +106,7 @@ MixerWidget::MixerWidget(int tid, std::shared_ptr<Mlt::Tractor> service, const Q
     , m_levelFilter(nullptr)
     , m_monitorFilter(nullptr)
     , m_balanceFilter(nullptr)
+    , m_channels(pCore->audioChannels())
     , m_maxLevels(qMax(30, (int)(service->get_fps() * 1.5)))
     , m_solo(nullptr)
     , m_record(nullptr)
@@ -119,6 +125,7 @@ MixerWidget::MixerWidget(int tid, Mlt::Tractor *service, const QString &trackTag
     , m_levelFilter(nullptr)
     , m_monitorFilter(nullptr)
     , m_balanceFilter(nullptr)
+    , m_channels(pCore->audioChannels())
     , m_maxLevels(qMax(30, (int)(service->get_fps() * 1.5)))
     , m_solo(nullptr)
     , m_record(nullptr)
@@ -404,7 +411,7 @@ void MixerWidget::updateAudioLevel(int pos)
 {
     QMutexLocker lk(&m_storeMutex);
     if (m_levels.contains(pos)) {
-        m_audioMeterWidget->setAudioValues({m_levels.value(pos).first, m_levels.value(pos).second});
+        m_audioMeterWidget->setAudioValues(m_levels.value(pos));
         //m_levels.remove(pos);
     } else {
         m_audioMeterWidget->setAudioValues({-100, -100});

src/audiomixer/mixerwidget.hpp

@@ -87,7 +87,8 @@ protected:
     std::shared_ptr<Mlt::Filter> m_levelFilter;
     std::shared_ptr<Mlt::Filter> m_monitorFilter;
     std::shared_ptr<Mlt::Filter> m_balanceFilter;
-    QMap<int, QPair<double, double>> m_levels;
+    QMap<int, QVector<double>> m_levels;
+    int m_channels;
     KDualAction *m_muteAction;
     QSpinBox *m_balanceSpin;
     QDial *m_balanceDial;

src/core.cpp

@@ -917,3 +917,8 @@ bool Core::enableMultiTrack(bool enable)
     }
     return false;
 }
+
+int Core::audioChannels()
+{
+    return currentDoc()->audioChannels();
+}

src/core.h

@@ -221,6 +221,8 @@ public:
     int undoIndex() const;
     /** @brief Enable / disable monitor multitrack view. Returns false if multitrack was not previously enabled */
     bool enableMultiTrack(bool enable);
+    /** @brief Returns number of audio channels for this project. */
+    int audioChannels();
 
 private:
     explicit Core();

src/dialogs/renderwidget.cpp

@@ -1404,6 +1404,8 @@ void RenderWidget::generateRenderFiles(QDomDocument doc, const QString &playlist
         consumer.setAttribute(QStringLiteral("in"), in);
         consumer.setAttribute(QStringLiteral("out"), out);
     }
+    // Audio Channels
+    consumer.setAttribute(QStringLiteral("channels"), pCore->audioChannels());
 
     // Check if the rendering profile is different from project profile,
     // in which case we need to use the producer_comsumer from MLT

src/doc/kdenlivedoc.cpp

@@ -71,7 +71,7 @@
 const double DOCUMENTVERSION = 0.99;
 
 KdenliveDoc::KdenliveDoc(const QUrl &url, QString projectFolder, QUndoGroup *undoGroup, const QString &profileName, const QMap<QString, QString> &properties,
-                         const QMap<QString, QString> &metadata, const QPoint &tracks, bool *openBackup, MainWindow *parent)
+                         const QMap<QString, QString> &metadata, const QPair<int, int> &tracks, int audioChannels, bool *openBackup, MainWindow *parent)
     : QObject(parent)
     , m_autosave(nullptr)
     , m_url(url)
@@ -106,9 +106,10 @@ KdenliveDoc::KdenliveDoc(const QUrl &url, QString projectFolder, QUndoGroup *und
     m_documentProperties[QStringLiteral("generateimageproxy")] = QString::number((int)KdenliveSettings::generateimageproxy());
     m_documentProperties[QStringLiteral("proxyimageminsize")] = QString::number(KdenliveSettings::proxyimageminsize());
     m_documentProperties[QStringLiteral("proxyimagesize")] = QString::number(KdenliveSettings::proxyimagesize());
-    m_documentProperties[QStringLiteral("videoTarget")] = QString::number(tracks.y());
-    m_documentProperties[QStringLiteral("audioTarget")] = QString::number(tracks.y() - 1);
-    m_documentProperties[QStringLiteral("activeTrack")] = QString::number(tracks.y());
+    m_documentProperties[QStringLiteral("videoTarget")] = QString::number(tracks.second);
+    m_documentProperties[QStringLiteral("audioTarget")] = QString::number(tracks.second - 1);
+    m_documentProperties[QStringLiteral("activeTrack")] = QString::number(tracks.second);
+    m_documentProperties[QStringLiteral("audioChannels")] = QString::number(audioChannels);
     m_documentProperties[QStringLiteral("enableTimelineZone")] = QLatin1Char('0');
     m_documentProperties[QStringLiteral("zonein")] = QLatin1Char('0');
     m_documentProperties[QStringLiteral("zoneout")] = QStringLiteral("75");
@@ -250,7 +251,7 @@ KdenliveDoc::KdenliveDoc(const QUrl &url, QString projectFolder, QUndoGroup *und
     if (!success) {
         m_url.clear();
         pCore->setCurrentProfile(profileName);
-        m_document = createEmptyDocument(tracks.x(), tracks.y());
+        m_document = createEmptyDocument(tracks.first, tracks.second);
         updateProjectProfile(false);
     } else {
         m_clipsCount = m_document.elementsByTagName(QLatin1String("entry")).size();
@@ -1760,3 +1761,8 @@ QMap <QString, QString> KdenliveDoc::getProjectTags()
     }
     return tags;
 }
+
+int KdenliveDoc::audioChannels() const
+{
+    return getDocumentProperty(QStringLiteral("audioChannels"), QStringLiteral("2")).toInt();
+}

src/doc/kdenlivedoc.h

@@ -58,7 +58,7 @@ class KdenliveDoc : public QObject
     Q_OBJECT
 public:
     KdenliveDoc(const QUrl &url, QString projectFolder, QUndoGroup *undoGroup, const QString &profileName, const QMap<QString, QString> &properties,
-                const QMap<QString, QString> &metadata, const QPoint &tracks, bool *openBackup, MainWindow *parent = nullptr);
+                const QMap<QString, QString> &metadata, const QPair<int, int> &tracks, int audioChannels, bool *openBackup, MainWindow *parent = nullptr);
     ~KdenliveDoc() override;
     friend class LoadJob;
     /** @brief Get current document's producer. */
@@ -157,6 +157,8 @@ public:
     int clipsCount() const;
     /** @brief Returns a list of project tags (color / description) */
     QMap <QString, QString> getProjectTags();
+    /** @brief Returns the number of audio channels for this project */
+    int audioChannels() const;
 
 private:
     QUrl m_url;

src/kdenlivesettings.kcfg

@@ -144,6 +144,11 @@
       <default>2</default>
     </entry>
 
+    <entry name="audio_channels" type="Int">
+      <label>Default number of audio channels per track.</label>
+      <default>0</default>
+    </entry>
+
     <entry name="enableproxy" type="Bool">
       <label>Enable proxy clips.</label>
       <default>false</default>

src/mainwindow.cpp

@@ -1825,8 +1825,8 @@ void MainWindow::slotEditProjectSettings()
 {
     KdenliveDoc *project = pCore->currentDoc();
     QPair <int, int> p = getMainTimeline()->getTracksCount();
-
-    ProjectSettings *w = new ProjectSettings(project, project->metadata(), getMainTimeline()->controller()->extractCompositionLumas(), p.first, p.second,
+    int channels = qMin(project->getDocumentProperty(QStringLiteral("audioChannels"), QStringLiteral("2")).toInt(), 2);
+    ProjectSettings *w = new ProjectSettings(project, project->metadata(), getMainTimeline()->controller()->extractCompositionLumas(), p.first, p.second, channels,
                                              project->projectTempFolder(), true, !project->isModified(), this);
     connect(w, &ProjectSettings::disableProxies, this, &MainWindow::slotDisableProxies);
     // connect(w, SIGNAL(disablePreview()), pCore->projectManager()->currentTimeline(), SLOT(invalidateRange()));

src/monitor/glwidget.cpp

@@ -1141,6 +1141,7 @@ int GLWidget::reconfigure()
             dropFrames = -dropFrames;
         }
         m_consumer->set("real_time", dropFrames);
+        m_consumer->set("channels", pCore->audioChannels());
         if (KdenliveSettings::previewScaling() > 1) {
             m_consumer->set("scale", 1.0 / KdenliveSettings::previewScaling());
         }

src/monitor/glwidget.h

@@ -149,7 +149,7 @@ protected:
     void mouseDoubleClickEvent(QMouseEvent *event) override;
     void wheelEvent(QWheelEvent *event) override;
     /** @brief Update producer, should ONLY be called from monitor */
-    int setProducer(const std::shared_ptr<Mlt::Producer> &producer, bool isActive, int position = -1);
+    int setProducer(const std::shared_ptr<Mlt::Producer> &producer, bool isActive, int position);
     int setProducer(const QString &file);
     QString frameToTime(int frames) const;
 

src/monitor/monitor.cpp

@@ -1545,7 +1545,7 @@ void Monitor::slotOpenClip(const std::shared_ptr<ProjectClip> &controller, int i
         // hasEffects =  controller->hasEffects();
     } else {
         loadQmlScene(MonitorSceneDefault);
-        m_glMonitor->setProducer(nullptr, isActive());
+        m_glMonitor->setProducer(nullptr, isActive(), -1);
         m_glMonitor->getControllerProxy()->setAudioThumb();
         m_audioMeterWidget->audioChannels = 0;
         m_glMonitor->getControllerProxy()->setClipProperties(-1, ClipType::Unknown, false, QString());
@@ -2255,6 +2255,7 @@ void Monitor::requestSeek(int pos)
 
 void Monitor::setProducer(std::shared_ptr<Mlt::Producer> producer, int pos)
 {
+    m_audioMeterWidget->audioChannels = pCore->audioChannels();
     m_glMonitor->setProducer(std::move(producer), isActive(), pos);
 }
 

src/monitor/monitor.h

@@ -159,6 +159,7 @@ public:
     /** @brief Returns true if monitor is currently fullscreen */
     bool monitorIsFullScreen() const;
     void reloadActiveStream();
+    
 
 protected:
     void mousePressEvent(QMouseEvent *event) override;

src/monitor/monitormanager.cpp

@@ -644,4 +644,3 @@ void MonitorManager::updateBgColor()
         m_clipMonitor->updateBgColor();
     }
 }
-

src/project/dialogs/projectsettings.cpp

@@ -63,8 +63,7 @@ public:
     }
 };
 
-ProjectSettings::ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metadata, QStringList lumas, int videotracks, int audiotracks,
-                                 const QString & /*projectPath*/, bool readOnlyTracks, bool savedProject, QWidget *parent)
+ProjectSettings::ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metadata, QStringList lumas, int videotracks, int audiotracks, int audiochannels, const QString & /*projectPath*/, bool readOnlyTracks, bool savedProject, QWidget *parent)
     : QDialog(parent)
     , m_savedProject(savedProject)
     , m_lumas(std::move(lumas))
@@ -88,6 +87,11 @@ ProjectSettings::ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metada
     video_thumbs->setChecked(KdenliveSettings::videothumbnails());
     audio_tracks->setValue(audiotracks);
     video_tracks->setValue(videotracks);
+    if (audiochannels == 4) {
+        audio_channels->setCurrentIndex(1);
+    } else if (audiochannels == 6) {
+        audio_channels->setCurrentIndex(2);
+    }
     connect(generate_proxy, &QAbstractButton::toggled, proxy_minsize, &QWidget::setEnabled);
     connect(generate_imageproxy, &QAbstractButton::toggled, proxy_imageminsize, &QWidget::setEnabled);
     connect(generate_imageproxy, &QAbstractButton::toggled, image_label, &QWidget::setEnabled);
@@ -187,6 +191,7 @@ ProjectSettings::ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metada
     if (readOnlyTracks) {
         video_tracks->setEnabled(false);
         audio_tracks->setEnabled(false);
+        audio_channels->setEnabled(false);
     }
 
     metadata_list->setItemDelegateForColumn(0, new NoEditDelegate(this));
@@ -472,12 +477,21 @@ QUrl ProjectSettings::selectedFolder() const
     return project_folder->url();
 }
 
-QPoint ProjectSettings::tracks() const
+QPair<int, int> ProjectSettings::tracks() const
+{
+    return {video_tracks->value(), audio_tracks->value()};
+}
+
+int ProjectSettings::audioChannels() const
 {
-    QPoint p;
-    p.setX(video_tracks->value());
-    p.setY(audio_tracks->value());
-    return p;
+    switch (audio_channels->currentIndex()) {
+        case 1:
+            return 4;
+        case 2:
+            return 6;
+        default:
+            return 2;
+    }
 }
 
 bool ProjectSettings::enableVideoThumbs() const

src/project/dialogs/projectsettings.h

@@ -33,11 +33,12 @@ class ProjectSettings : public QDialog, public Ui::ProjectSettings_UI
     Q_OBJECT
 
 public:
-    ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metadata, QStringList lumas, int videotracks, int audiotracks, const QString &projectPath,
+    ProjectSettings(KdenliveDoc *doc, QMap<QString, QString> metadata, QStringList lumas, int videotracks, int audiotracks, int audiochannels, const QString &projectPath,
                     bool readOnlyTracks, bool unsavedProject, QWidget *parent = nullptr);
     QString selectedProfile() const;
     QUrl selectedFolder() const;
-    QPoint tracks() const;
+    QPair<int, int> tracks() const;
+    int audioChannels() const;
     bool enableVideoThumbs() const;
     bool enableAudioThumbs() const;
     bool useProxy() const;

src/project/projectmanager.cpp

@@ -143,7 +143,13 @@ void ProjectManager::newFile(QString profileName, bool showProjectSettings)
     QString projectFolder;
     QMap<QString, QString> documentProperties;
     QMap<QString, QString> documentMetadata;
-    QPoint projectTracks(KdenliveSettings::videotracks(), KdenliveSettings::audiotracks());
+    QPair<int, int> projectTracks{KdenliveSettings::videotracks(), KdenliveSettings::audiotracks()};
+    int audioChannels = 2;
+    if (KdenliveSettings::audio_channels() == 1) {
+        audioChannels = 4;
+    } else if (KdenliveSettings::audio_channels() == 2) {
+        audioChannels = 6;
+    }
     pCore->monitorManager()->resetDisplay();
     QString documentId = QString::number(QDateTime::currentMSecsSinceEpoch());
     documentProperties.insert(QStringLiteral("documentid"), documentId);
@@ -159,8 +165,7 @@ void ProjectManager::newFile(QString profileName, bool showProjectSettings)
             documentProperties.insert(QStringLiteral("storagefolder"), projectFolder + documentId);
         }
     } else {
-        QPointer<ProjectSettings> w = new ProjectSettings(nullptr, QMap<QString, QString>(), QStringList(), projectTracks.x(), projectTracks.y(),
-                                                          KdenliveSettings::defaultprojectfolder(), false, true, pCore->window());
+        QPointer<ProjectSettings> w = new ProjectSettings(nullptr, QMap<QString, QString>(), QStringList(), projectTracks.first, projectTracks.second, audioChannels, KdenliveSettings::defaultprojectfolder(), false, true, pCore->window());
         connect(w.data(), &ProjectSettings::refreshProfiles, pCore->window(), &MainWindow::slotRefreshProfiles);
         if (w->exec() != QDialog::Accepted) {
             delete w;
@@ -179,11 +184,13 @@ void ProjectManager::newFile(QString profileName, bool showProjectSettings)
         profileName = w->selectedProfile();
         projectFolder = w->storageFolder();
         projectTracks = w->tracks();
+        audioChannels = w->audioChannels();
         documentProperties.insert(QStringLiteral("enableproxy"), QString::number((int)w->useProxy()));
         documentProperties.insert(QStringLiteral("generateproxy"), QString::number((int)w->generateProxy()));
         documentProperties.insert(QStringLiteral("proxyminsize"), QString::number(w->proxyMinSize()));
         documentProperties.insert(QStringLiteral("proxyparams"), w->proxyParams());
         documentProperties.insert(QStringLiteral("proxyextension"), w->proxyExtension());
+        documentProperties.insert(QStringLiteral("audioChannels"), QString::number(w->audioChannels()));
         documentProperties.insert(QStringLiteral("generateimageproxy"), QString::number((int)w->generateImageProxy()));
         QString preview = w->selectedPreview();
         if (!preview.isEmpty()) {
@@ -203,8 +210,7 @@ void ProjectManager::newFile(QString profileName, bool showProjectSettings)
     bool openBackup;
     m_notesPlugin->clear();
     documentProperties.insert(QStringLiteral("decimalPoint"), QLocale().decimalPoint());
-    KdenliveDoc *doc = new KdenliveDoc(QUrl(), projectFolder, pCore->window()->m_commandStack, profileName, documentProperties, documentMetadata, projectTracks,
-                                       &openBackup, pCore->window());
+    KdenliveDoc *doc = new KdenliveDoc(QUrl(), projectFolder, pCore->window()->m_commandStack, profileName, documentProperties, documentMetadata, projectTracks, audioChannels, &openBackup, pCore->window());
     doc->m_autosave = new KAutoSaveFile(startFile, doc);
     ThumbnailCache::get()->clearCache();
     pCore->bin()->setDocument(doc);
@@ -516,10 +522,16 @@ void ProjectManager::doOpenFile(const QUrl &url, KAutoSaveFile *stale)
     m_progressDialog->show();
     bool openBackup;
     m_notesPlugin->clear();
+    int audioChannels = 2;
+    if (KdenliveSettings::audio_channels() == 1) {
+        audioChannels = 4;
+    } else if (KdenliveSettings::audio_channels() == 2) {
+        audioChannels = 6;
+    }
     KdenliveDoc *doc = new KdenliveDoc(stale ? QUrl::fromLocalFile(stale->fileName()) : url, QString(), pCore->window()->m_commandStack,
                                        KdenliveSettings::default_profile().isEmpty() ? pCore->getCurrentProfile()->path() : KdenliveSettings::default_profile(),
                                        QMap<QString, QString>(), QMap<QString, QString>(),
-                                       QPoint(KdenliveSettings::videotracks(), KdenliveSettings::audiotracks()), &openBackup, pCore->window());
+                                       {KdenliveSettings::videotracks(), KdenliveSettings::audiotracks()}, audioChannels, &openBackup, pCore->window());
     if (stale == nullptr) {
         const QString projectId = QCryptographicHash::hash(url.fileName().toUtf8(), QCryptographicHash::Md5).toHex();
         QUrl autosaveUrl = QUrl::fromLocalFile(QFileInfo(url.path()).absoluteDir().absoluteFilePath(projectId + QStringLiteral(".kdenlive")));

src/ui/configproject_ui.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>486</width>
-    <height>310</height>
+    <width>579</width>
+    <height>250</height>
    </rect>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
@@ -17,7 +17,20 @@
    <property name="topMargin">
     <number>0</number>
    </property>
-   <item row="5" column="0" colspan="5">
+   <item row="0" column="0" colspan="7">
+    <widget class="QGroupBox" name="profile_box">
+     <property name="flat">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="3">
+    <widget class="QSpinBox" name="kcfg_audiotracks"/>
+   </item>
+   <item row="1" column="1">
+    <widget class="QSpinBox" name="kcfg_videotracks"/>
+   </item>
+   <item row="5" column="0" colspan="7">
     <widget class="QPlainTextEdit" name="previewparams">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Maximum">
@@ -30,27 +43,14 @@
      </property>
     </widget>
    </item>
-   <item row="1" column="4">
-    <spacer name="horizontalSpacer">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>58</width>
-       <height>22</height>
-      </size>
-     </property>
-    </spacer>
-   </item>
-   <item row="0" column="0" colspan="5">
-    <widget class="QGroupBox" name="profile_box">
-     <property name="flat">
-      <bool>true</bool>
+   <item row="1" column="2">
+    <widget class="QLabel" name="label_7">
+     <property name="text">
+      <string>Audio tracks</string>
      </property>
     </widget>
    </item>
-   <item row="3" column="0" colspan="5">
+   <item row="3" column="0" colspan="7">
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <item>
       <widget class="QCheckBox" name="kcfg_customprojectfolder">
@@ -60,7 +60,7 @@
       </widget>
      </item>
      <item>
-      <widget class="KUrlRequester" name="projecturl">
+      <widget class="KUrlRequester" name="projecturl" native="true">
        <property name="enabled">
         <bool>false</bool>
        </property>
@@ -68,13 +68,7 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="1">
-    <widget class="QSpinBox" name="kcfg_videotracks"/>
-   </item>
-   <item row="1" column="3">
-    <widget class="QSpinBox" name="kcfg_audiotracks"/>
-   </item>
-   <item row="4" column="0" colspan="5">
+   <item row="4" column="0" colspan="7">
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QLabel" name="label_25">
@@ -118,13 +112,6 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="2">
-    <widget class="QLabel" name="label_7">
-     <property name="text">
-      <string>Audio tracks</string>
-     </property>
-    </widget>
-   </item>
    <item row="1" column="0">
     <widget class="QLabel" name="label_6">
      <property name="text">
@@ -145,6 +132,38 @@
      </property>
     </spacer>
    </item>
+   <item row="1" column="4">
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Audio channels</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="5">
+    <widget class="QComboBox" name="kcfg_audio_channels">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <item>
+      <property name="text">
+       <string>2 channels (stereo)</string>
+      </property>
+     </item>
+     <item>
+      <property name="text">
+       <string>4 channels</string>
+      </property>
+     </item>
+     <item>
+      <property name="text">
+       <string>6 channels</string>
+      </property>
+     </item>
+    </widget>
+   </item>
   </layout>
  </widget>
  <customwidgets>

src/ui/projectsettings_ui.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>733</width>
-    <height>571</height>
+    <height>511</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -51,7 +51,7 @@
           </widget>
          </item>
          <item>
-          <widget class="KUrlRequester" name="project_folder">
+          <widget class="KUrlRequester" name="project_folder" native="true">
            <property name="enabled">
             <bool>false</bool>
            </property>
@@ -95,17 +95,36 @@
           <widget class="QSpinBox" name="audio_tracks"/>
          </item>
          <item>
-          <spacer name="horizontalSpacer_2">
-           <property name="orientation">
-            <enum>Qt::Horizontal</enum>
+          <widget class="QLabel" name="label">
+           <property name="text">
+            <string>Audio channels</string>
            </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>67</width>
-             <height>20</height>
-            </size>
+          </widget>
+         </item>
+         <item>
+          <widget class="QComboBox" name="audio_channels">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
            </property>
-          </spacer>
+           <item>
+            <property name="text">
+             <string>2 channels (stereo)</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>4 channels</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>6 channels</string>
+            </property>
+           </item>
+          </widget>
          </item>
         </layout>
        </item>