diff --git a/SavvyCAN.pro b/SavvyCAN.pro
index 7f1d15e..39f0178 100644
--- a/SavvyCAN.pro
+++ b/SavvyCAN.pro
@@ -64,7 +64,8 @@ SOURCES += main.cpp\
     bus_protocols/isotp_handler.cpp \
     bus_protocols/j1939_handler.cpp \
     bus_protocols/uds_handler.cpp \
-    jsedit.cpp
+    jsedit.cpp \
+    frameplaybackobject.cpp
 
 HEADERS  += mainwindow.h \
     can_structs.h \
@@ -117,7 +118,8 @@ HEADERS  += mainwindow.h \
     bus_protocols/j1939_handler.h \
     bus_protocols/uds_handler.h \
     bus_protocols/isotp_message.h \
-    jsedit.h
+    jsedit.h \
+    frameplaybackobject.h
 
 FORMS    += ui/candatagrid.ui \
     ui/connectionwindow.ui \
diff --git a/connections/connectionwindow.cpp b/connections/connectionwindow.cpp
index a326a9e..99d084b 100644
--- a/connections/connectionwindow.cpp
+++ b/connections/connectionwindow.cpp
@@ -90,6 +90,7 @@ void ConnectionWindow::showEvent(QShowEvent* event)
     readSettings();
     ui->tableConnections->selectRow(0);
     currentRowChanged(ui->tableConnections->currentIndex(), ui->tableConnections->currentIndex());
+    handleConnTypeChanged();
 }
 
 void ConnectionWindow::closeEvent(QCloseEvent *event)
diff --git a/frameplaybackobject.cpp b/frameplaybackobject.cpp
new file mode 100644
index 0000000..c58c048
--- /dev/null
+++ b/frameplaybackobject.cpp
@@ -0,0 +1,456 @@
+#include "frameplaybackobject.h"
+
+FramePlaybackObject::FramePlaybackObject()
+{
+    mThread_p = new QThread();
+
+    currentPosition = 0;
+    playbackInterval = 1;
+    playbackBurst = 1;
+    statusCounter = 0;
+    numBuses = 0;
+    playbackActive = false;
+    playbackForward = true;
+    useOrigTiming = false;
+    whichBusSend = -1;
+}
+
+FramePlaybackObject::~FramePlaybackObject()
+{
+    mThread_p->quit();
+    mThread_p->wait();
+    delete mThread_p;
+}
+
+quint64 FramePlaybackObject::updatePosition(bool forward)
+{
+    //qDebug() << "updatePosition";
+    if (forward)
+    {
+        if (currentPosition < (currentSeqItem->data.count() - 1)) currentPosition++; //still in same file so keep going
+        else //hit the end of the current file
+        {
+            qDebug() << "hit end of current sequence";
+            currentSeqItem->currentLoopCount++;
+            currentPosition = 0;
+            if (currentSeqItem->currentLoopCount == currentSeqItem->maxLoops) //have we looped enough times?
+            {
+                playbackActive = false;
+                playbackTimer->stop();
+                emit EndOfFrameCache();
+                /*
+                currentSeqNum++; //go forward in the sequence
+                if (currentSeqNum == seqItems.count()) //are we at the end of the sequence?
+                {
+                    //reset the loop figures for each sequence entry
+                    for (int i = 0; i < seqItems.count(); i++) seqItems[i].currentLoopCount = 0;
+                    currentSeqNum = 0;
+                    if (ui->cbLoop->isChecked()) //go back to beginning if we're looping the sequence
+                    {
+
+                    }
+                    else //not looping so stop playback entirely
+                    {
+                        playbackActive = false;
+                        playbackTimer->stop();
+                    }
+                }
+                currentSeqItem = &seqItems[currentSeqNum];
+                ui->tblSequence->setCurrentCell(currentSeqNum, 0);
+                */
+            }
+        }
+    }
+    else
+    {
+        if (currentPosition > 0) currentPosition--;
+        else //hit the beginning of the current sequence
+        {
+            qDebug() << "hit start of current sequence";
+            currentSeqItem->currentLoopCount++;
+            currentPosition = currentSeqItem->data.count() - 1;
+            if (currentSeqItem->currentLoopCount == currentSeqItem->maxLoops) //have we looped enough times?
+            {
+                playbackActive = false;
+                playbackTimer->stop();
+                emit EndOfFrameCache();
+
+                /*
+                currentSeqNum--; //go backward in the sequence
+                if (currentSeqNum == -1) //are we trying to go past the beginning?
+                {
+                    //reset the loop figures for each sequence entry
+                    for (int i = 0; i < seqItems.count(); i++) seqItems[i].currentLoopCount = 0;
+                    currentSeqNum = seqItems.count() - 1;
+                    if (ui->cbLoop->isChecked()) //go back to the last sequence entry if we're looping
+                    {
+
+                    }
+                    else //not looping so stop playback entirely
+                    {
+                        playbackActive = false;
+                        playbackTimer->stop();
+                    }
+                }
+                currentSeqItem = &seqItems[currentSeqNum];
+                ui->tblSequence->setCurrentCell(currentSeqNum, 0);
+                */
+            }
+        }
+    }
+    //updateFrameLabel();
+    //only send frame out if its ID is checked in the list. Otherwise discard it.
+    CANFrame *thisFrame = &currentSeqItem->data[currentPosition];
+    uint32_t originalBus = thisFrame->bus;
+    if (currentSeqItem->idFilters.find(thisFrame->ID).value())
+    {
+        if (whichBusSend > -1)
+        {
+            thisFrame->bus = whichBusSend;
+            sendingBuffer.append(*thisFrame);
+        }
+        else if (whichBusSend == -1)
+        {
+            for (int c = 0; c < numBuses; c++)
+            {
+                thisFrame->bus = c;
+                sendingBuffer.append(*thisFrame);
+            }
+        }
+        else //from file so retain original bus and send as-is
+        {
+            sendingBuffer.append(*thisFrame);
+        }
+
+        thisFrame->bus = originalBus;
+    }
+    return thisFrame->timestamp;
+}
+
+quint64 FramePlaybackObject::peekPosition(bool forward)
+{
+    int peekCurrentPosition = currentPosition;
+    if (forward)
+    {
+        if (peekCurrentPosition < (currentSeqItem->data.count() - 1)) peekCurrentPosition++; //still in same file so keep going
+        else //hit the end of the current file
+        {
+            return 0xFFFFFFFFFFFFFFFFull;
+        }
+    }
+    else
+    {
+        if (peekCurrentPosition > 0) peekCurrentPosition--;
+        else //hit the beginning of the current sequence
+        {
+            return 0xFFFFFFFFFFFFFFFFull;
+        }
+    }
+    CANFrame *thisFrame = &currentSeqItem->data[peekCurrentPosition];
+    return thisFrame->timestamp;
+}
+
+void FramePlaybackObject::piStart()
+{
+    playbackTimer = new QTimer();
+    playbackTimer->setTimerType(Qt::PreciseTimer);
+    playbackTimer->setInterval(1);
+
+    currentPosition = 0;
+    playbackActive = false;
+    playbackForward = true;
+    whichBusSend = 0;
+
+    connect(playbackTimer, &QTimer::timeout, this, &FramePlaybackObject::timerTriggered);
+}
+
+void FramePlaybackObject::piStop()
+{
+    playbackTimer->stop();
+    delete playbackTimer;
+}
+
+void FramePlaybackObject::initialize()
+{
+    if( mThread_p && (mThread_p != QThread::currentThread()) )
+    {
+        /* move ourself to the thread */
+        moveToThread(mThread_p); /*TODO handle errors */
+        /* connect started() */
+        connect(mThread_p, SIGNAL(started()), this, SLOT(initialize()));
+        /* start the thread */
+        mThread_p->start(QThread::HighPriority);
+        return;
+    }
+
+    /* set started flag */
+    //mStarted = true;
+
+    /* in multithread case, this will be called before entering thread event loop */
+    return piStart();
+
+}
+
+void FramePlaybackObject::finalize()
+{
+    /* 1) execute in mThread_p context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) )
+    {
+        /* if thread is finished, it means we call this function for the second time so we can leave */
+        if( !mThread_p->isFinished() )
+        {
+            /* we need to call piStop() */
+            QMetaObject::invokeMethod(this, "finalize",
+                                      Qt::BlockingQueuedConnection);
+            /* 3) stop thread */
+            mThread_p->quit();
+            if(!mThread_p->wait()) {
+                qDebug() << "can't stop thread";
+            }
+        }
+        return;
+    }
+
+    /* 2) call piStop in mThread context */
+    return piStop();
+}
+
+void FramePlaybackObject::startPlaybackForward()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "startPlaybackForward",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    playbackActive = true;
+    playbackForward = true;
+
+    if (useOrigTiming)
+    {
+        playbackTimer->setInterval(1);
+        playbackElapsed.start();
+        if (currentSeqItem->data[currentPosition].timestamp > 2000)
+            playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp - 2000;
+        else playbackLastTimeStamp = 0;
+    }
+    playbackTimer->start();
+}
+
+void FramePlaybackObject::startPlaybackBackward()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "startPlaybackBackward",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    playbackActive = true;
+    playbackForward = false;
+    if (useOrigTiming)
+    {
+        playbackElapsed.start();
+        playbackTimer->setInterval(1);
+        playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp + 2000;
+    }
+    playbackTimer->start();
+}
+
+void FramePlaybackObject::stepPlaybackForward()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "stepPlaybackForward",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    sendingBuffer.clear();
+    playbackTimer->stop();
+    playbackActive = false;
+    updatePosition(true);
+    CANConManager::getInstance()->sendFrames(sendingBuffer);
+}
+
+void FramePlaybackObject::stepPlaybackBackward()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "stepPlaybackBackward",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    sendingBuffer.clear();
+    playbackTimer->stop(); //pushing this button halts automatic playback
+    playbackActive = false;
+
+    updatePosition(false);
+    CANConManager::getInstance()->sendFrames(sendingBuffer);
+}
+
+void FramePlaybackObject::stopPlayback()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "stopPlayback",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    playbackTimer->stop(); //pushing this button halts automatic playback
+    playbackActive = false;
+    currentPosition = 0;
+    /*
+    if (seqItems.count() > 0)
+    {
+        currentSeqNum = 0;
+        currentSeqItem = &seqItems[currentSeqNum];
+    }
+    else {
+        currentSeqNum = -1;
+        currentSeqItem = NULL;
+    }
+    if (ui->tblSequence->rowCount() > 0)
+    {
+        ui->tblSequence->setCurrentCell(0, 0);
+        refreshIDList();
+    }
+    updateFrameLabel(); */
+}
+
+void FramePlaybackObject::pausePlayback()
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "pausePlayback",
+                                  Qt::BlockingQueuedConnection);
+        return;
+    }
+
+    playbackActive = false;
+    playbackTimer->stop();
+}
+
+void FramePlaybackObject::setSequenceObject(SequenceItem *item)
+{
+    currentSeqItem = item;
+}
+
+void FramePlaybackObject::setUseOriginalTiming(bool state)
+{
+    useOrigTiming = state;
+}
+
+void FramePlaybackObject::setSendingBus(int bus)
+{
+    whichBusSend = bus;
+}
+
+void FramePlaybackObject::setPlaybackBurst(int burst)
+{
+    playbackBurst = burst;
+}
+
+void FramePlaybackObject::setNumBuses(int buses)
+{
+    numBuses = buses;
+}
+
+//any time you touch objects that live in a potentially different thread you must switch into that thread.
+//So this function is a bit different than the rest of the simple setters for that reason.
+void FramePlaybackObject::setPlaybackInterval(int interval)
+{
+    /* make sure we execute in mThread context */
+    if( mThread_p && (mThread_p != QThread::currentThread()) ) {
+        QMetaObject::invokeMethod(this, "setPlaybackInterval",
+                                  Qt::BlockingQueuedConnection,
+                                  Q_ARG(int , interval) );
+        return;
+    }
+    playbackInterval = interval;
+    playbackTimer->setInterval(interval);
+}
+
+void FramePlaybackObject::timerTriggered()
+{
+    sendingBuffer.clear();
+
+    if (useOrigTiming)
+    {
+        //get elapsed microseconds since last tick (in case timer skips or is otherwise inaccurate, though there are no guarantees about elapsed timer either)
+        quint64 elapsed = playbackElapsed.nsecsElapsed() / 1000;
+        playbackElapsed.start();
+        if (playbackForward)
+        {
+            playbackLastTimeStamp += elapsed;
+            //qDebug() << playbackLastTimeStamp;
+            //qDebug() << "El: " << elapsed;
+            while (peekPosition(true) <= playbackLastTimeStamp)
+            {
+                updatePosition(true);
+            }
+            if (peekPosition(true) == 0xFFFFFFFFFFFFFFFFull)
+            {
+                updatePosition(true); //this'll go to the next log (if there is one)
+                if (currentSeqItem->data[currentPosition].timestamp > 1000)
+                    playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp - 1000;
+                else playbackLastTimeStamp = 0;
+            }
+        }
+        else
+        {
+            if (playbackLastTimeStamp > elapsed)
+                playbackLastTimeStamp -= elapsed;
+            else playbackLastTimeStamp = 0;
+            while (peekPosition(false) >= playbackLastTimeStamp && peekPosition(false) != 0xFFFFFFFFFFFFFFFFull)
+            {
+                updatePosition(false);
+            }
+            if (peekPosition(false) == 0xFFFFFFFFFFFFFFFFull)
+            {
+                updatePosition(false); //this'll go to the next log (if there is one)
+                playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp + 1000;
+            }
+        }
+        statusCounter++;
+    }
+    else
+    {
+        for (int count = 0; count < playbackBurst; count++)
+        {
+            if (!playbackActive)
+            {
+                playbackTimer->stop();
+                return;
+            }
+            if (playbackForward)
+            {
+                updatePosition(true);
+            }
+            else
+            {
+                updatePosition(false);
+            }
+        }
+        statusCounter += playbackInterval;
+    }
+
+    if (statusCounter > 249)
+    {
+        statusCounter = 0;
+        emit statusUpdate(currentPosition);
+    }
+
+    //qDebug() << "sb: " << sendingBuffer.count();
+    if (sendingBuffer.count() > 0) CANConManager::getInstance()->sendFrames(sendingBuffer);
+}
+
+
+
+
+
+
+
diff --git a/frameplaybackobject.h b/frameplaybackobject.h
new file mode 100644
index 0000000..0935ffc
--- /dev/null
+++ b/frameplaybackobject.h
@@ -0,0 +1,102 @@
+#ifndef FRAMEPLAYBACKOBJECT_H
+#define FRAMEPLAYBACKOBJECT_H
+
+#include <QElapsedTimer>
+#include <QTimer>
+#include <QHash>
+#include <QThread>
+#include <QDebug>
+#include "can_structs.h"
+#include "connections/canconmanager.h"
+
+//one entry in the sequence of data to use
+struct SequenceItem
+{
+    QString filename;
+    QVector<CANFrame> data;
+    QHash<int, bool> idFilters;
+    int maxLoops;
+    int currentLoopCount;
+};
+
+/*
+  broken out functionality that used to be in frameplaybackwindow. That mixed code for Model/View/Controller into one giant
+  class. I wasn't too concerned about that but the problem is that all code within a GUI object runs in GUI context and that
+  is most certainly not a feature, especially if you have a multi-core CPU. This object lives in a separate thread from the GUI
+  and thus is better scheduled and doesn't block the GUI thread. Really all functionality in this program should be broken into
+  a separate thread from GUI if it is prone to running a long time and/or taking up a lot of CPU time (unless it really does
+  have to interface with the GUI in some way. All gui touching code must run on its thread).
+*/
+class FramePlaybackObject : public QObject
+{
+    Q_OBJECT
+
+public:
+    FramePlaybackObject();
+    ~FramePlaybackObject();
+
+public slots:
+    /**
+     * @brief start the device. This calls piStarted
+     * @note starts the working thread if required (piStart is called in the working thread context)
+     */
+    void initialize();
+
+    /**
+     * @brief stop the device. This calls piStop
+     * @note if a working thread is used, piStop is called before exiting the working thread
+     */
+    void finalize();
+
+    void startPlaybackForward();
+    void startPlaybackBackward();
+    void stepPlaybackForward();
+    void stepPlaybackBackward();
+    void stopPlayback();
+    void pausePlayback();
+
+    void setSequenceObject(SequenceItem *item);
+    void setUseOriginalTiming(bool state);
+    void setSendingBus(int bus);
+    void setPlaybackInterval(int interval);
+    void setPlaybackBurst(int burst);
+    void setNumBuses(int buses);
+
+signals:
+    void EndOfFrameCache(); //we hit the end/beginning of the frame cache (depending on direction of playback)
+    void statusUpdate(int frameNum);
+
+private slots:
+    void timerTriggered();
+
+private:
+     QList<CANFrame> sendingBuffer;
+     SequenceItem *currentSeqItem;
+     int currentPosition;
+     QTimer *playbackTimer;
+     QElapsedTimer playbackElapsed;
+     quint64 playbackLastTimeStamp;
+     int playbackInterval;
+     int playbackBurst;
+     int numBuses;
+     int statusCounter;
+     bool playbackActive;
+     bool playbackForward;
+     bool useOrigTiming;
+     int whichBusSend;
+     QThread*            mThread_p;
+
+     quint64 updatePosition(bool forward);
+     quint64 peekPosition(bool forward);
+     /**
+      * @brief starts the device
+      */
+     void piStart();
+
+     /**
+      * @brief stops the device
+      */
+     void piStop();
+};
+
+#endif // FRAMEPLAYBACKOBJECT_H
diff --git a/frameplaybackwindow.cpp b/frameplaybackwindow.cpp
index b0f0eaa..87725ae 100644
--- a/frameplaybackwindow.cpp
+++ b/frameplaybackwindow.cpp
@@ -32,19 +32,17 @@ FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, QWidge
     ui->comboCANBus->addItem(tr("From File"));
     ui->comboCANBus->setCurrentIndex(0);
 
+    playbackObject.initialize();
+    playbackObject.setNumBuses(numBuses);
+
     readSettings();
 
     modelFrames = frames;
 
-    playbackTimer = new QTimer();
-    playbackTimer->setTimerType(Qt::PreciseTimer);
-
-    currentPosition = 0;
-    playbackActive = false;
-    playbackForward = true;
-    whichBusSend = 0; //0 = no bus, 1 = bus 0, 2 = bus 1, 4 = from file - Bitfield so you can 'or' them.
     currentSeqItem = NULL;
     currentSeqNum = -1;
+    currentPosition = 0;
+    forward = true;
 
     updateFrameLabel();
 
@@ -58,10 +56,10 @@ FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, QWidge
     connect(ui->btnSelectNone, &QAbstractButton::clicked, this, &FramePlaybackWindow::btnSelectNoneClick);
     connect(ui->btnDelete, &QAbstractButton::clicked, this, &FramePlaybackWindow::btnDeleteCurrSeq);
     connect(ui->spinPlaySpeed, SIGNAL(valueChanged(int)), this, SLOT(changePlaybackSpeed(int)));
+    connect(ui->spinBurstSpeed, SIGNAL(valueChanged(int)), this, SLOT(changeBurstRate(int)));
     //connect(ui->cbLoop, SIGNAL(clicked(bool)), this, SLOT(changeLooping(bool)));
     connect(ui->comboCANBus, SIGNAL(currentIndexChanged(int)), this, SLOT(changeSendingBus(int)));
     connect(ui->listID, &QListWidget::itemClicked, this, &FramePlaybackWindow::changeIDFiltering);
-    connect(playbackTimer, &QTimer::timeout, this, &FramePlaybackWindow::timerTriggered);
     connect(ui->btnLoadFile, &QAbstractButton::clicked, this, &FramePlaybackWindow::btnLoadFile);
     connect(ui->btnLoadLive, &QAbstractButton::clicked, this, &FramePlaybackWindow::btnLoadLive);
     connect(ui->tblSequence, &QTableWidget::cellPressed, this, &FramePlaybackWindow::seqTableCellClicked);
@@ -70,10 +68,13 @@ FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, QWidge
     connect(ui->btnSaveFilters, &QAbstractButton::clicked, this, &FramePlaybackWindow::saveFilters);
     connect(ui->cbOriginalTiming, &QCheckBox::toggled, this, &FramePlaybackWindow::useOrigTimingClicked);
 
+    connect(&playbackObject, &FramePlaybackObject::EndOfFrameCache, this, &FramePlaybackWindow::EndOfFrameCache);
+    connect(&playbackObject, &FramePlaybackObject::statusUpdate, this, &FramePlaybackWindow::getStatusUpdate);
+
     ui->listID->setContextMenuPolicy(Qt::CustomContextMenu);
     connect(ui->listID, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(contextMenuFilters(QPoint)));
 
-    playbackTimer->setInterval(ui->spinPlaySpeed->value()); //set the timer to the default value of the control
+    playbackObject.setPlaybackInterval(ui->spinPlaySpeed->value());
 
     QStringList headers;
     headers << "Source" << "Loops";
@@ -86,9 +87,6 @@ FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, QWidge
 FramePlaybackWindow::~FramePlaybackWindow()
 {
     delete ui;
-
-    playbackTimer->stop();
-    delete playbackTimer;
 }
 
 void FramePlaybackWindow::showEvent(QShowEvent *)
@@ -116,7 +114,8 @@ void FramePlaybackWindow::readSettings()
     }
     ui->spinPlaySpeed->setValue(settings.value("Playback/DefSpeed", 5).toInt());
     ui->comboCANBus->setCurrentIndex(settings.value("Playback/SendingBus", 0).toInt());
-    whichBusSend = ui->comboCANBus->currentIndex();
+
+    calculateWhichBus();
 }
 
 void FramePlaybackWindow::writeSettings()
@@ -257,6 +256,35 @@ void FramePlaybackWindow::refreshIDList()
     ui->listID->sortItems();
 }
 
+void FramePlaybackWindow::calculateWhichBus()
+{
+    int idx = ui->comboCANBus->currentIndex();
+    int maxIdx = ui->comboCANBus->count() - 1;
+    int out = idx;
+    if (idx == (maxIdx - 1) ) out = -1;
+    if (idx == maxIdx) out = -2;
+
+    playbackObject.setSendingBus(out);
+}
+
+void FramePlaybackWindow::EndOfFrameCache()
+{
+    if (forward)
+    {
+
+    }
+    else
+    {
+
+    }
+}
+
+void FramePlaybackWindow::getStatusUpdate(int frameNum)
+{
+    currentPosition = frameNum;
+    updateFrameLabel();
+}
+
 void FramePlaybackWindow::updateFrameLabel()
 {
     int row = currentSeqNum;
@@ -320,11 +348,13 @@ void FramePlaybackWindow::useOrigTimingClicked()
     {
         ui->spinBurstSpeed->setEnabled(false);
         ui->spinPlaySpeed->setEnabled(false);
+        playbackObject.setUseOriginalTiming(true);
     }
     else
     {
         ui->spinBurstSpeed->setEnabled(true);
         ui->spinPlaySpeed->setEnabled(true);
+        playbackObject.setUseOriginalTiming(false);
     }
 }
 
@@ -332,11 +362,7 @@ void FramePlaybackWindow::btnDeleteCurrSeq()
 {
     if (currentSeqNum == -1) return;
 
-    if (playbackActive)
-    {
-        playbackActive = false;
-        playbackTimer->stop();
-    }
+    playbackObject.stopPlayback();
 
     seqItems.removeAt(currentSeqNum);
     ui->tblSequence->removeRow(currentSeqNum);
@@ -380,6 +406,7 @@ void FramePlaybackWindow::btnLoadFile()
         {
             currentSeqNum = 0;
             currentSeqItem = &seqItems[0];
+            playbackObject.setSequenceObject(currentSeqItem);
         }
         refreshIDList();
         updateFrameLabel();
@@ -408,6 +435,7 @@ void FramePlaybackWindow::btnLoadLive()
     {
         currentSeqNum = 0;
         currentSeqItem = &seqItems[0];
+        playbackObject.setSequenceObject(currentSeqItem);
     }
     refreshIDList();
     updateFrameLabel();
@@ -416,38 +444,24 @@ void FramePlaybackWindow::btnLoadLive()
 
 void FramePlaybackWindow::btnBackOneClick()
 {
-    sendingBuffer.clear();
-    playbackTimer->stop(); //pushing this button halts automatic playback
-    playbackActive = false;
-
-    updatePosition(false);
-    CANConManager::getInstance()->sendFrames(sendingBuffer);
+    forward = false;
+    playbackObject.stepPlaybackBackward();
 }
 
 void FramePlaybackWindow::btnPauseClick()
 {
-    playbackActive = false;
-    playbackTimer->stop();
+    playbackObject.pausePlayback();
 }
 
 void FramePlaybackWindow::btnReverseClick()
 {
-    playbackActive = true;
-    playbackForward = false;
-    if (ui->cbOriginalTiming->isChecked())
-    {
-        playbackElapsed.start();
-        playbackTimer->setInterval(1);
-        playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp + 2000;
-    }
-    playbackTimer->start();
+    forward = false;
+    playbackObject.startPlaybackBackward();
 }
 
 void FramePlaybackWindow::btnStopClick()
 {
-    playbackTimer->stop(); //pushing this button halts automatic playback
-    playbackActive = false;
-    currentPosition = 0;
+    playbackObject.stopPlayback();
     if (seqItems.count() > 0)
     {
         currentSeqNum = 0;
@@ -462,36 +476,29 @@ void FramePlaybackWindow::btnStopClick()
         ui->tblSequence->setCurrentCell(0, 0);
         refreshIDList();
     }
-    updateFrameLabel();
+    //updateFrameLabel();
 }
 
 void FramePlaybackWindow::btnPlayClick()
 {
-    playbackActive = true;
-    playbackForward = true;
-    if (ui->cbOriginalTiming->isChecked())
-    {
-        playbackTimer->setInterval(1);
-        playbackElapsed.start();
-        if (currentSeqItem->data[currentPosition].timestamp > 1000)
-            playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp - 2000;
-        else playbackLastTimeStamp = 0;
-    }
-    playbackTimer->start();
+    forward = true;
+    playbackObject.startPlaybackForward();
 }
 
 void FramePlaybackWindow::btnFwdOneClick()
 {
-    sendingBuffer.clear();
-    playbackTimer->stop();
-    playbackActive = false;
-    updatePosition(true);
-    CANConManager::getInstance()->sendFrames(sendingBuffer);
+    forward = true;
+    playbackObject.stepPlaybackForward();
 }
 
 void FramePlaybackWindow::changePlaybackSpeed(int newSpeed)
 {
-    playbackTimer->setInterval(newSpeed);
+    playbackObject.setPlaybackInterval(newSpeed);
+}
+
+void FramePlaybackWindow::changeBurstRate(int burst)
+{
+    playbackObject.setPlaybackBurst(burst);
 }
 
 void FramePlaybackWindow::changeLooping(bool check)
@@ -501,7 +508,7 @@ void FramePlaybackWindow::changeLooping(bool check)
 
 void FramePlaybackWindow::changeSendingBus(int newIdx)
 {
-    whichBusSend = newIdx;
+    calculateWhichBus();
 }
 
 void FramePlaybackWindow::changeIDFiltering(QListWidgetItem *item)
@@ -530,185 +537,3 @@ void FramePlaybackWindow::btnSelectNoneClick()
         currentSeqItem->idFilters[Utility::ParseStringToNum(item->text())] = false;
     }
 }
-
-void FramePlaybackWindow::timerTriggered()
-{
-    sendingBuffer.clear();
-
-    if (ui->cbOriginalTiming->isChecked())
-    {
-        //get elapsed microseconds since last tick (in case timer skips or is otherwise inaccurate, though there are no guarantees about elapsed timer either)
-        quint64 elapsed = playbackElapsed.nsecsElapsed() / 1000;
-        playbackElapsed.start();
-        if (playbackForward)
-        {
-            playbackLastTimeStamp += elapsed;
-            //qDebug() << playbackLastTimeStamp;
-            while (peekPosition(true) <= playbackLastTimeStamp)
-            {
-                updatePosition(true);
-            }
-            if (peekPosition(true) == 0xFFFFFFFFFFFFFFFFull)
-            {
-                updatePosition(true); //this'll go to the next log (if there is one)
-                if (currentSeqItem->data[currentPosition].timestamp > 1000)
-                    playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp - 1000;
-                else playbackLastTimeStamp = 0;
-            }
-        }
-        else
-        {
-            if (playbackLastTimeStamp > elapsed)
-                playbackLastTimeStamp -= elapsed;
-            else playbackLastTimeStamp = 0;
-            while (peekPosition(false) >= playbackLastTimeStamp && peekPosition(false) != 0xFFFFFFFFFFFFFFFFull)
-            {
-                updatePosition(false);
-            }
-            if (peekPosition(false) == 0xFFFFFFFFFFFFFFFFull)
-            {
-                updatePosition(false); //this'll go to the next log (if there is one)
-                playbackLastTimeStamp = currentSeqItem->data[currentPosition].timestamp + 1000;
-            }
-        }
-    }
-    else
-    {
-        for (int count = 0; count < ui->spinBurstSpeed->value(); count++)
-        {
-            if (!playbackActive)
-            {
-                playbackTimer->stop();
-                return;
-            }
-            if (playbackForward)
-            {
-                updatePosition(true);
-            }
-            else
-            {
-                updatePosition(false);
-            }
-        }
-    }
-
-    CANConManager::getInstance()->sendFrames(sendingBuffer);
-}
-
-quint64 FramePlaybackWindow::updatePosition(bool forward)
-{
-    //qDebug() << "updatePosition";
-    if (forward)
-    {
-        if (currentPosition < (currentSeqItem->data.count() - 1)) currentPosition++; //still in same file so keep going
-        else //hit the end of the current file
-        {
-            qDebug() << "hit end of current sequence";
-            currentSeqItem->currentLoopCount++;
-            currentPosition = 0;
-            if (currentSeqItem->currentLoopCount == currentSeqItem->maxLoops) //have we looped enough times?
-            {
-                currentSeqNum++; //go forward in the sequence
-                if (currentSeqNum == seqItems.count()) //are we at the end of the sequence?
-                {
-                    //reset the loop figures for each sequence entry
-                    for (int i = 0; i < seqItems.count(); i++) seqItems[i].currentLoopCount = 0;
-                    currentSeqNum = 0;
-                    if (ui->cbLoop->isChecked()) //go back to beginning if we're looping the sequence
-                    {
-
-                    }
-                    else //not looping so stop playback entirely
-                    {
-                        playbackActive = false;
-                        playbackTimer->stop();
-                    }
-                }
-                currentSeqItem = &seqItems[currentSeqNum];
-                ui->tblSequence->setCurrentCell(currentSeqNum, 0);
-            }
-        }
-    }
-    else
-    {
-        if (currentPosition > 0) currentPosition--;
-        else //hit the beginning of the current sequence
-        {
-            qDebug() << "hit start of current sequence";
-            currentSeqItem->currentLoopCount++;
-            currentPosition = currentSeqItem->data.count() - 1;
-            if (currentSeqItem->currentLoopCount == currentSeqItem->maxLoops) //have we looped enough times?
-            {
-                currentSeqNum--; //go backward in the sequence
-                if (currentSeqNum == -1) //are we trying to go past the beginning?
-                {
-                    //reset the loop figures for each sequence entry
-                    for (int i = 0; i < seqItems.count(); i++) seqItems[i].currentLoopCount = 0;
-                    currentSeqNum = seqItems.count() - 1;
-                    if (ui->cbLoop->isChecked()) //go back to the last sequence entry if we're looping
-                    {
-
-                    }
-                    else //not looping so stop playback entirely
-                    {
-                        playbackActive = false;
-                        playbackTimer->stop();
-                    }
-                }
-                currentSeqItem = &seqItems[currentSeqNum];
-                ui->tblSequence->setCurrentCell(currentSeqNum, 0);
-            }
-        }
-    }
-    updateFrameLabel();
-    //only send frame out if its ID is checked in the list. Otherwise discard it.
-    CANFrame *thisFrame = &currentSeqItem->data[currentPosition];
-    uint32_t originalBus = thisFrame->bus;
-    if (currentSeqItem->idFilters.find(thisFrame->ID).value())
-    {
-        if (whichBusSend < ui->comboCANBus->count() - 2)
-        {
-            thisFrame->bus = whichBusSend;
-            sendingBuffer.append(*thisFrame);
-        }
-        else if (whichBusSend == (ui->comboCANBus->count() - 2))  //all
-        {
-            for (int c = 0; c < ui->comboCANBus->count() - 2; c++)
-            {
-                thisFrame->bus = c;
-                sendingBuffer.append(*thisFrame);
-            }
-        }
-        else //from file so retain original bus and send as-is
-        {
-            sendingBuffer.append(*thisFrame);
-        }
-
-        thisFrame->bus = originalBus;
-    }
-    return thisFrame->timestamp;
-}
-
-quint64 FramePlaybackWindow::peekPosition(bool forward)
-{
-    int peekCurrentPosition = currentPosition;
-    if (forward)
-    {
-        if (peekCurrentPosition < (currentSeqItem->data.count() - 1)) peekCurrentPosition++; //still in same file so keep going
-        else //hit the end of the current file
-        {
-            return 0xFFFFFFFFFFFFFFFFull;
-        }
-    }
-    else
-    {
-        if (peekCurrentPosition > 0) peekCurrentPosition--;
-        else //hit the beginning of the current sequence
-        {
-            return 0xFFFFFFFFFFFFFFFFull;
-        }
-    }
-    CANFrame *thisFrame = &currentSeqItem->data[peekCurrentPosition];
-    return thisFrame->timestamp;
-}
-
diff --git a/frameplaybackwindow.h b/frameplaybackwindow.h
index 7de1ac3..f9e163d 100644
--- a/frameplaybackwindow.h
+++ b/frameplaybackwindow.h
@@ -2,26 +2,15 @@
 #define FRAMEPLAYBACKWINDOW_H
 
 #include <QDialog>
-#include <QElapsedTimer>
 #include <QListWidget>
-#include <QTimer>
 #include "can_structs.h"
 #include "framefileio.h"
+#include "frameplaybackobject.h"
 
 namespace Ui {
 class FramePlaybackWindow;
 }
 
-//one entry in the sequence of data to use
-struct SequenceItem
-{
-    QString filename;
-    QVector<CANFrame> data;
-    QHash<int, bool> idFilters;
-    int maxLoops;
-    int currentLoopCount;
-};
-
 class FramePlaybackWindow : public QDialog
 {
     Q_OBJECT
@@ -39,12 +28,12 @@ private slots:
     void btnFwdOneClick();
     void btnDeleteCurrSeq();
     void changePlaybackSpeed(int newSpeed);
+    void changeBurstRate(int burst);
     void changeLooping(bool check);
     void changeSendingBus(int newIdx);
     void changeIDFiltering(QListWidgetItem *item);
     void btnSelectAllClick();
     void btnSelectNoneClick();
-    void timerTriggered();
     void btnLoadFile();
     void btnLoadLive();
     void seqTableCellClicked(int row, int col);
@@ -53,33 +42,29 @@ private slots:
     void saveFilters();
     void loadFilters();
     void useOrigTimingClicked();
+    void getStatusUpdate(int frameNum);
+    void EndOfFrameCache();
 
 private:
     Ui::FramePlaybackWindow *ui;
     QList<int> foundID;
     QList<CANFrame> frameCache;
-    QList<CANFrame> sendingBuffer;
     const QVector<CANFrame> *modelFrames;
-    int currentPosition;
-    QTimer *playbackTimer;
-    QElapsedTimer playbackElapsed;
-    quint64 playbackLastTimeStamp;
-    bool playbackActive;
-    bool playbackForward;
-    int whichBusSend;
     QList<SequenceItem> seqItems;
     SequenceItem *currentSeqItem;
     int currentSeqNum;
+    FramePlaybackObject playbackObject;
+    bool forward;
+    int currentPosition;
 
     void refreshIDList();
     void updateFrameLabel();
-    quint64 updatePosition(bool forward);
-    quint64 peekPosition(bool forward);
     void fillIDHash(SequenceItem &item);
     void showEvent(QShowEvent *);
     void closeEvent(QCloseEvent *event);
     void readSettings();
     void writeSettings();
+    void calculateWhichBus();
 };
 
 #endif // FRAMEPLAYBACKWINDOW_H