diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..d02e348
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 4
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7e1bcd9..8ed11c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,12 @@ find_package(Qt6 6.6 COMPONENTS Widgets Multimedia Network LinguistTools REQUIRE
 find_package(KF6Codecs 6.1.0)
 find_package(PkgConfig)
 
+option(KISSFFT_PKGCONFIG OFF)
+option(KISSFFT_STATIC ON)
+option(KISSFFT_TEST OFF)
+option(KISSFFT_TOOLS OFF)
+add_subdirectory(kissfft EXCLUDE_FROM_ALL)
+
 if (USE_QTEXTCODEC)
     find_package(Qt6 6.6 COMPONENTS Core5Compat REQUIRED)
 endif()
@@ -84,7 +90,7 @@ if (TARGET KF6::Codecs)
     target_link_libraries (${EXE_NAME} PRIVATE KF6::Codecs)
 endif ()
 
-target_link_libraries(${EXE_NAME} PRIVATE Qt::Widgets Qt::Multimedia Qt::Network)
+target_link_libraries(${EXE_NAME} PRIVATE Qt::Widgets Qt::Multimedia Qt::Network kissfft::kissfft)
 
 if (USE_QTEXTCODEC)
     target_compile_definitions(${EXE_NAME} PRIVATE USE_QTEXTCODEC=1)
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 6d1b7ae..fbc20ee 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -17,6 +17,8 @@
 #include <QMediaPlayer>
 #include <QMediaMetaData>
 #include <QAudioOutput>
+#include <QAudioBuffer>
+#include <QAudioBufferOutput>
 #include <QPropertyAnimation>
 #include <QFileDialog>
 #include <QTime>
@@ -32,6 +34,8 @@
 #include <QMessageBox>
 #include <QStringBuilder>
 
+#include <kissfft.hh>
+
 constexpr QSize miniSize(490, 160);
 constexpr QSize fullSize(490, 420);
 
@@ -41,14 +45,16 @@ MainWindow::MainWindow(QWidget *parent)
     , m_mediaDevices(new QMediaDevices(this))
     , m_mediaPlayer(new QMediaPlayer(this))
     , m_audioOutput(new QAudioOutput(this))
+    , m_audioBufferOutput(new QAudioBufferOutput(this))
     , m_lrcbar(new LrcBar(nullptr))
     , m_playlistManager(new PlaylistManager(this))
 {
     ui->setupUi(this);
     m_playlistManager->setAutoLoadFilterSuffixes({
-        "*.mp3", "*.wav", "*.aiff", "*.ape", "*.flac", "*.ogg", "*.oga", "*.mpga", "*.aac"
+        "*.mp3", "*.wav", "*.aiff", "*.ape", "*.flac", "*.ogg", "*.oga", "*.mpga", "*.aac", "*.tta"
     });
     m_mediaPlayer->setAudioOutput(m_audioOutput);
+    m_mediaPlayer->setAudioBufferOutput(m_audioBufferOutput);
     m_mediaPlayer->setLoops(QMediaPlayer::Infinite);
     ui->playlistView->setModel(m_playlistManager->model());
 
@@ -400,6 +406,19 @@ void MainWindow::initConnections()
         m_audioOutput->setDevice(m_mediaDevices->defaultAudioOutput());
     });
 
+    connect(m_audioBufferOutput, &QAudioBufferOutput::audioBufferReceived, this, [=](const QAudioBuffer& buffer) {
+        const QAudioFormat&& fmt = buffer.format();
+        QAudioFormat::SampleFormat sampleFormat = fmt.sampleFormat();
+        int channelCount = fmt.channelCount();
+        if (sampleFormat == QAudioFormat::Int16 && channelCount == 2) {
+            const QAudioBuffer::S16S * data = buffer.constData<QAudioBuffer::S16S>();
+            for (int i = 0; i < buffer.sampleCount(); ++i) {
+                // ...?
+            }
+        }
+        // TODO: draw spectrum
+    });
+
     connect(m_mediaPlayer, &QMediaPlayer::sourceChanged, this, [=](){
         QUrl fileUrl(m_mediaPlayer->source());
 
@@ -438,6 +457,7 @@ void MainWindow::initConnections()
         setAudioMetadataForDisplay(metadata.stringValue(QMediaMetaData::Title),
                                    metadata.stringValue(QMediaMetaData::Author),
                                    metadata.stringValue(QMediaMetaData::AlbumTitle));
+        setAudioPropertyInfoForDisplay(-1, metadata.value(QMediaMetaData::AudioBitRate).toInt() / 1000, -1, metadata.stringValue(QMediaMetaData::FileFormat));
 #endif // NO_TAGLIB
         QVariant coverArt(metadata.value(QMediaMetaData::ThumbnailImage));
         if (!coverArt.isNull()) {
diff --git a/mainwindow.h b/mainwindow.h
index a6a770b..c88834e 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -14,6 +14,7 @@ namespace Ui { class MainWindow; }
 class QMediaDevices;
 class QMediaPlayer;
 class QAudioOutput;
+class QAudioBufferOutput;
 class QPropertyAnimation;
 QT_END_NAMESPACE
 
@@ -92,6 +93,7 @@ private:
     QMediaDevices *m_mediaDevices;
     QMediaPlayer *m_mediaPlayer;
     QAudioOutput *m_audioOutput;
+    QAudioBufferOutput *m_audioBufferOutput;
     LrcBar *m_lrcbar;
     QPropertyAnimation *m_fadeOutAnimation;
     PlaylistManager *m_playlistManager;