diff --git a/sync/ETcpSocket.cpp b/sync/ETcpSocket.cpp
new file mode 100755
index 0000000..c78b20a
--- /dev/null
+++ b/sync/ETcpSocket.cpp
@@ -0,0 +1,144 @@
+#include "ETcpSocket.h"
+#include "exaptions.h"
+
+ETcpSocket::ETcpSocket()
+{
+    source=new QTcpSocket();
+    init();
+}
+ETcpSocket::ETcpSocket(QTcpSocket*ptr)
+{
+    source=ptr;
+    init();
+}
+
+ETcpSocket::ETcpSocket(const QString& address, int port){
+    source = new QTcpSocket();
+    if(!source->bind(QHostAddress(address),port) || !source->open(QIODevice::ReadWrite)){
+        throw AddNodeExaption();
+    }
+    init();
+}
+
+void ETcpSocket::init(){
+    array=new QByteArray;
+    connect(source,SIGNAL(connected()),this,SLOT(connected_()));
+    connect(source,SIGNAL(disconnected()),this,SLOT(disconnected_()));
+    connect(source,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(error_(QAbstractSocket::SocketError)));
+    connect(source,SIGNAL(hostFound()),this,SLOT(hostFound_()));
+    connect(source,SIGNAL(proxyAuthenticationRequired(const QNetworkProxy &, QAuthenticator *)),this,SLOT(proxyAuthenticationRequired_(const QNetworkProxy &, QAuthenticator *)));
+    connect(source,SIGNAL(stateChanged(QAbstractSocket::SocketState)),this,SLOT(stateChanged_(QAbstractSocket::SocketState)));
+    connect(source,SIGNAL(readyRead()),this,SLOT(readReady_()));
+}
+
+void ETcpSocket::error_(QAbstractSocket::SocketError i){
+    emit Error(this,i);
+}
+
+void ETcpSocket::connected_(){
+    emit Connected(this);
+}
+
+void ETcpSocket::disconnected_(){
+    emit Disconnected(this);
+}
+
+void ETcpSocket::hostFound_(){
+    emit HostFound(this);
+}
+
+void ETcpSocket::proxyAuthenticationRequired_(const QNetworkProxy &proxy, QAuthenticator *authenticator){
+    emit ProxyAuthenticationRequired(this,proxy,authenticator);
+}
+
+void ETcpSocket::stateChanged_(QAbstractSocket::SocketState socketState){
+    emit StateChanged(this,socketState);
+}
+
+void ETcpSocket::readReady_(){
+    bool sizewrite=array->isEmpty();
+    //while(source->bytesAvailable())
+    array->append(source->readAll());
+    QDataStream stream(array,QIODevice::ReadOnly);
+    if(sizewrite)
+        stream>>size;
+#ifdef QT_DEBUG
+    qDebug()<<"messae size:"<<size;
+    qDebug()<<"message package size:"<<array->size();
+#endif
+    if(size==array->size())
+    {
+        array->remove(0,sizeof(qint32));
+        ReadyStack.push_back(array);
+        array=new QByteArray();
+        emit Message(this);
+    }else{
+        emit donwload(array->size(),size);
+    }
+   // emit ReadReady(this);
+}
+
+QString ETcpSocket::name() const{
+    return source->peerAddress().toString();
+}
+
+QByteArray* ETcpSocket::topStack(){
+    if(ReadyStack.size())
+        return ReadyStack.front();
+    return NULL;
+}
+
+QTcpSocket* ETcpSocket::getSource()const{
+    return source;
+}
+
+void ETcpSocket::nextItem(){
+    if( ReadyStack.size()){
+        ReadyStack.pop_front();
+    }
+}
+
+int ETcpSocket::sizeDescriptPackege(){
+    return sizeof(qint32);
+}
+
+QString ETcpSocket::toStringTcp(){
+    return source->peerAddress().toString();
+}
+
+bool ETcpSocket::Write(const QByteArray&data){
+    if(source->state()==QTcpSocket::ConnectedState){
+       QByteArray array;
+       QDataStream stream(&array,QIODevice::ReadWrite);
+       stream<<qint32(0);
+       //stream<<data;
+       array.append(data);
+       stream.device()->seek(0);
+       stream<<qint32(array.size());
+#ifdef QT_DEBUG
+       qDebug()<<"size :"<<array.size();
+       qint64 temp= source->write(array);
+       qDebug()<<"size  write:"<<temp<<" size packege:"<<array.size();
+       return temp==(array.size());
+#else
+       return source->write(array)==(array.size());
+#endif
+   }
+    return false;
+}
+
+ETcpSocket::~ETcpSocket()
+{
+    for(QByteArray*i:ReadyStack){
+        i->clear();
+        delete i;
+    }
+    disconnect(source,SIGNAL(connected()),this,SLOT(connected_()));
+    disconnect(source,SIGNAL(disconnected()),this,SLOT(disconnected_()));
+    disconnect(source,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(error_(QAbstractSocket::SocketError)));
+    disconnect(source,SIGNAL(hostFound()),this,SLOT(hostFound_()));
+    disconnect(source,SIGNAL(proxyAuthenticationRequired(const QNetworkProxy &, QAuthenticator *)),this,SLOT(proxyAuthenticationRequired_(const QNetworkProxy &, QAuthenticator *)));
+    disconnect(source,SIGNAL(stateChanged(QAbstractSocket::SocketState)),this,SLOT(stateChanged_(QAbstractSocket::SocketState)));
+    disconnect(source,SIGNAL(readyRead()),this,SLOT(readReady_()));
+    source->deleteLater();
+}
diff --git a/sync/ETcpSocket.h b/sync/ETcpSocket.h
new file mode 100755
index 0000000..c87d518
--- /dev/null
+++ b/sync/ETcpSocket.h
@@ -0,0 +1,74 @@
+#ifndef CLIENT_H
+#define CLIENT_H
+#include <QTcpSocket>
+#include <QTcpServer>
+#include <QList>
+#include <QDataStream>
+
+/**
+ * @brief The ETcpSocket class
+ * example :
+ * ETcpSocket *tcp;
+ * try{
+ *  tcp = new ETcpSocket(addres,port);
+ * }catch(addNodeExaption e){
+ *  e.what();
+ * }
+ * QByteArray *array;
+ * while(array = tcp.getSource()){
+ *  package pkg(*array);
+ *  package ans = ansver(pkg);
+ *  tcp.Write(ans);
+ *  array->clear();
+ *  delete array;
+ *
+ * }
+ *
+ */
+class ETcpSocket:public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString name READ name)
+private:
+    QTcpSocket *source;
+    QByteArray *array;
+    qint32 size;
+    QList<QByteArray*> ReadyStack;
+    void init();
+
+private slots:
+    void connected_();
+    void disconnected_();
+    void error_(QAbstractSocket::SocketError socketError);
+    void hostFound_();
+    void readReady_();
+    void proxyAuthenticationRequired_(const QNetworkProxy &proxy, QAuthenticator *authenticator);
+    void stateChanged_(QAbstractSocket::SocketState socketState);
+public:
+    explicit ETcpSocket();
+    explicit ETcpSocket(QTcpSocket*);
+    explicit ETcpSocket(const QString& addres,int port);
+    QTcpSocket* getSource()const;
+    QByteArray* topStack();
+    void nextItem();
+    int sizeDescriptPackege();
+    bool Write(const QByteArray&);
+    ~ETcpSocket();
+public slots:
+    QString name()const;
+    QString toStringTcp();
+signals:
+    void donwload(int val,int max);
+    void ReadyComplit(ETcpSocket*,QDataStream&);
+    void Connected(ETcpSocket*);
+    void Message(ETcpSocket*);
+    void Disconnected(ETcpSocket*);
+    void Error(ETcpSocket*,QAbstractSocket::SocketError socketError);
+    void HostFound(ETcpSocket*);
+    void ProxyAuthenticationRequired(ETcpSocket*,const QNetworkProxy &proxy, QAuthenticator *authenticator);
+    void StateChanged(ETcpSocket*,QAbstractSocket::SocketState socketState);
+    //void Connected(QTcpSocket*);
+    //void errorConnect(QTcpSocket*,QAbstractSocket::SocketError);
+};
+
+#endif // CLIENT_H
diff --git a/sync/LocalScanner.cpp b/sync/LocalScanner.cpp
new file mode 100755
index 0000000..9dc76fb
--- /dev/null
+++ b/sync/LocalScanner.cpp
@@ -0,0 +1,68 @@
+#include "LocalScanner.h"
+#include "config.h"
+
+LocalScanner::LocalScanner():
+    QObject()
+{
+   wiat.setInterval(1000);
+   connect(&wiat,SIGNAL(timeout()),SLOT(scaned_()));
+}
+
+void LocalScanner::clear(){
+    results.clear();
+}
+
+void LocalScanner::setInterval(int msec){
+    wiat.setInterval(msec);
+}
+
+void LocalScanner::clearSocets(){
+    for(ETcpSocket* i:socets)
+        delete i;
+    socets.clear();
+}
+
+QHostAddress LocalScanner::thisAdress(){
+    QList<QHostAddress> adress= QNetworkInterface::allAddresses();
+    for(QHostAddress &ip:adress)
+        if(ip.protocol() == QAbstractSocket::IPv4Protocol && ip != QHostAddress(QHostAddress::LocalHost))
+            return ip;
+    return QHostAddress::LocalHost;
+}
+
+void LocalScanner::scane(){
+    if(!socets.empty())
+        return ;
+    QList<QHostAddress> adress= QNetworkInterface::allAddresses();
+    clear();
+    wiat.start();
+    for(QHostAddress &ip:adress){
+        if(ip.protocol() == QAbstractSocket::IPv4Protocol && ip != QHostAddress(QHostAddress::LocalHost)){
+            for(int i=0;i<256;i++){
+                QString adr= ip.toString();
+                adr=adr.left(adr.lastIndexOf("."))+"."+QString::number(i);
+                ETcpSocket *temp=new ETcpSocket;
+                connect(temp,SIGNAL(Connected(ETcpSocket*)),SLOT(connected(ETcpSocket*)));
+                temp->getSource()->connectToHost(adr,DEDAULT_PORT);
+                socets.push_back(temp);
+            }
+        }
+    }
+}
+
+void LocalScanner::scaned_(){
+    wiat.stop();
+    emit scaned(&results);
+    clearSocets();
+}
+
+void LocalScanner::connected(ETcpSocket *c){
+    results.push_back(c);
+}
+
+LocalScanner::~LocalScanner(){
+    for(ETcpSocket* i: socets)
+        delete i;
+    socets.clear();
+
+}
diff --git a/sync/LocalScanner.h b/sync/LocalScanner.h
new file mode 100755
index 0000000..0db7ada
--- /dev/null
+++ b/sync/LocalScanner.h
@@ -0,0 +1,29 @@
+#ifndef LocalServers_H
+#define LocalServers_H
+#include <QNetworkInterface>
+#include <QHostInfo>
+#include <QList>
+#include <QTimer>
+#include "ETcpSocket.h"
+
+class LocalScanner:public QObject{
+    Q_OBJECT
+private:
+    QList<ETcpSocket*> socets;
+    QList<ETcpSocket*> results;
+    QTimer wiat;
+    void clear();
+    void clearSocets();
+private slots:
+    void scaned_();
+    void connected(ETcpSocket *);
+public:
+    void scane();
+    void setInterval(int msec);
+    static QHostAddress thisAdress();
+    LocalScanner();
+    ~LocalScanner();
+signals:
+    void scaned(QList<ETcpSocket*>*);
+};
+#endif // LocalServers_H
diff --git a/sync/config.h b/sync/config.h
new file mode 100644
index 0000000..5ae3218
--- /dev/null
+++ b/sync/config.h
@@ -0,0 +1,19 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+// LIB VERSION
+#define MAJOR_VERSION               0
+#define MINOR_VERSION               0
+#define REVISION_VERSION            0
+
+// sqlite config
+#define DATABASE_NAME               "songdata.dat"
+#define DATATABLE_NAME              "songs"
+
+// network config
+#define DEDAULT_PORT                1239
+#define MAX_SYNC_TIME               20 * 1000 // 10 sec on microsec
+#define SYNC_TIME                   5 * 1000  // 5 sec on microsec
+#define DEEP_SCANER_INTERVAL        10000     // 10 sec
+
+#endif // CONFIG_H
diff --git a/sync/exaptions.h b/sync/exaptions.h
new file mode 100644
index 0000000..54a9126
--- /dev/null
+++ b/sync/exaptions.h
@@ -0,0 +1,58 @@
+#ifndef EXAPTIONS_H
+#define EXAPTIONS_H
+
+#include <exception>
+#include <QString>
+#include <QTranslator>
+/**
+ * @brief The MediaException class
+ */
+class MediaException:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("Your operating system or platform has not supported media files.");
+    }
+};
+
+class AddNodeExaption:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("Address not available");
+    }
+};
+
+class CreatePackageExaption:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("Сould not generate network packet");
+    }
+};
+
+class BadAnswerExaption:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("could not parse message nodes.");
+    }
+};
+
+class BrodcastConflict:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("The server received the packet from the server.");
+    }
+};
+
+class SyncError:public std::exception
+{
+public:
+    QString what(){
+        return QObject::tr("The playlist is empty, the player has nothing to play.");
+    }
+};
+
+#endif // EXAPTIONS_H
diff --git a/sync/node.cpp b/sync/node.cpp
new file mode 100644
index 0000000..5b09839
--- /dev/null
+++ b/sync/node.cpp
@@ -0,0 +1,210 @@
+#include "node.h"
+#include <QTcpSocket>
+#include "song.h"
+#include <QDataStream>
+#include "exaptions.h"
+namespace syncLib{
+
+package::package(){
+    clear();
+}
+package::package(const QByteArray &array):
+    package::package(){
+    parseFrom(array);
+}
+
+const SongHeader& package::getHeader() const{
+    return header;
+}
+
+const Song& package::getSong() const{
+    return source;
+}
+
+const Syncer& package::getPlayData() const{
+    return playdata;
+}
+
+const Type& package::getType() const{
+    return type;
+}
+
+bool package::isValid() const{
+
+    bool ret = true;
+    if(type == TypePackage::t_void){
+        return false;
+
+    }
+
+    if(type & TypePackage::t_play){
+        ret = ret && true;
+
+    }
+
+    if(type & TypePackage::t_sync){
+        ret = ret && (playdata.run > 0 && playdata.seek > 0);
+
+    }
+
+    if(type & TypePackage::t_song_h){
+        ret = ret && header.size > 0;
+
+    }
+
+    if(type & TypePackage::t_song){
+        ret = ret && source.size > 0;
+
+    }
+
+    if(type & TypePackage::t_close){
+        ret = ret && true;
+
+    }
+
+    if(type & TypePackage::t_stop){
+        ret = ret && true;
+
+    }
+
+    return ret;
+
+}
+
+void package::clear(){
+    type = TypePackage::t_void;
+    source.clear();
+    playdata.run = 0;
+    playdata.seek = 0;
+}
+
+QByteArray package::parseTo(){
+    QByteArray temp;
+    QDataStream stream(temp);
+    temp.clear();
+    if(isValid()){
+        stream <<  static_cast<unsigned char>(type);
+
+        if(type & TypePackage::t_sync){
+            stream << playdata.run;
+            stream << playdata.seek;
+
+        }
+
+        if(type & TypePackage::t_song_h){
+            stream << header;
+
+        }
+
+        if(type & TypePackage::t_song){
+            stream << source;
+
+        }
+
+    }
+    return temp;
+}
+
+bool package::parseFrom(const QByteArray &array){
+    type = TypePackage::t_void;
+    QDataStream stream(array);
+
+    unsigned char temp_type;
+    stream >> temp_type;
+    type = static_cast<TypePackage> (temp_type);
+
+    if(type & TypePackage::t_sync){
+        stream >> playdata.run;
+        stream >> playdata.seek;
+
+    }
+
+    if(type & TypePackage::t_song_h){
+        stream >> header;
+
+    }
+
+    if(type & TypePackage::t_song){
+        stream >> source;
+
+    }
+
+    return isValid();
+}
+
+Node::Node():QTcpServer(){
+    connect(this,SIGNAL(acceptError(QAbstractSocket::SocketError)),SLOT(acceptError_(QAbstractSocket::SocketError)));
+    connect(this,SIGNAL(newConnection()),SLOT(newConnection_()));
+}
+
+void Node::acceptError_(ETcpSocket*c){
+    c->getSource()->close();
+    clients.removeOne(c);
+    emit ClientDisconnected(c);
+    delete c;
+}
+
+QList<ETcpSocket*>* Node::getClients(){
+    return &clients;
+}
+
+void Node::newConnection_(){
+    ETcpSocket *newClient=new ETcpSocket(nextPendingConnection());
+    clients.push_back(newClient);
+    connect(newClient,SIGNAL(Disconnected(ETcpSocket*)),this,SLOT(acceptError_(ETcpSocket*)));
+    connect(newClient,SIGNAL(Message(ETcpSocket*)),this,SLOT(readData(ETcpSocket*)));
+    emit ClientConnected(newClient);
+}
+
+void Node::readData(ETcpSocket *c){
+    emit Message(c);
+}
+
+void Node::WriteAll(const QByteArray &data){
+    for(ETcpSocket*i:clients){
+        i->getSource()->write(data);
+    }
+}
+
+void Node::disconnectClient(ETcpSocket *c){
+    c->getSource()->close();
+    clients.removeOne(c);
+    delete c;
+}
+
+bool Node::addNode(const QString &node,int port){
+    ETcpSocket *temp;
+
+    try{
+        temp = new ETcpSocket(node,port);
+    }catch(AddNodeExaption  &e){
+#ifdef QT_DEBUG
+        qDebug() << e.what();
+#endif
+        return false;
+    }
+
+    clients.push_back(temp);
+    return true;
+
+}
+
+bool Node::addNode(ETcpSocket *node){
+    if(node->getSource()->isOpen()){
+        clients.append(node);
+        return true;
+    }
+    return false;
+}
+
+Node::~Node(){
+    for(ETcpSocket *i:clients){
+        i->getSource()->close();
+        delete i;
+    }
+    this->close();
+}
+
+}
+
+
diff --git a/sync/node.h b/sync/node.h
new file mode 100644
index 0000000..6bc2e4a
--- /dev/null
+++ b/sync/node.h
@@ -0,0 +1,107 @@
+#ifndef NODE_H
+#define NODE_H
+#include <QTcpServer>
+#include "ETcpSocket.h"
+#include <song.h>
+class Syncer;
+namespace syncLib {
+
+typedef unsigned char Type;
+
+/**
+ * @brief The TypePackage enum
+ * t_void - this package empty and not valid.
+ * t_close - the information about close channel.
+ * t_sync - the infomation about sync playning media file on network.
+ * t_song - the package with this type is necessary for translite media data on network.
+ * t_stop - the package with type 'stop' necessary for stoping playning media files.
+ */
+enum TypePackage{
+     t_void         =   0x00,
+     t_play         =   0x01,
+     t_song_h       =   0x02,
+     t_song         =   0x04,
+     t_sync         =   0x08,
+     t_close        =   0x10,
+     t_stop         =   0x20,
+     t_what         =   0x40,
+     t_brodcaster   =   0x80
+};
+
+/**
+ * @brief The package class. Package for translite media data on network
+ *
+ * parse map:
+ * 1 byle - type
+ * 4 byte - size of data of package (it avelable if type is t_sync or t_song)
+ * data
+ */
+class package
+{
+    /*parse map */
+
+/*
+ * 1 byle - type
+ * 4 byte - size of data of package (it avelable if type is t_sync or t_song)
+ * data
+*/
+
+private:
+    Type type;
+    Song source;
+    SongHeader header;
+    Syncer playdata;
+public:
+    package();
+    package(const QByteArray& array);
+    ~package();
+    /**
+     * @brief getHeader
+     * @return Header of the song
+     */
+    const SongHeader& getHeader() const;
+    /**
+     * @brief getSong
+     * @return Song
+     */
+    const Song& getSong() const;
+    /**
+     * @brief getPlayTime
+     * @return time of playning media data
+     */
+    const Syncer &getPlayData() const;
+    const Type& getType() const;
+    bool isValid() const;
+    void clear();
+    QByteArray parseTo();
+    bool parseFrom(const QByteArray& array);
+    friend class Sync;
+};
+
+class Node:public QTcpServer{
+    Q_OBJECT
+protected:
+    QList<ETcpSocket*> clients;
+private slots:
+    void acceptError_(ETcpSocket*);
+    void newConnection_();
+    void readData(ETcpSocket*_client);
+public:
+    Node();
+    void WriteAll(const QByteArray&);
+    void disconnectClient(ETcpSocket*);
+    QList<ETcpSocket*>* getClients();
+    bool addNode(const QString &node, int port = DEDAULT_PORT);
+    bool addNode(ETcpSocket* node);
+    ~Node();
+signals:
+    void Error(QString);
+    void Message(ETcpSocket*);
+    void ClientDisconnected(ETcpSocket*);
+    void ClientConnected(ETcpSocket*);
+};
+
+}
+
+
+#endif // NODE_H
diff --git a/sync/song.cpp b/sync/song.cpp
new file mode 100644
index 0000000..05ac05f
--- /dev/null
+++ b/sync/song.cpp
@@ -0,0 +1,81 @@
+#include "song.h"
+
+namespace syncLib{
+
+SongHeader::SongHeader()
+{
+    this->id = -1;
+    this->name = "";
+    this->size = 0;
+}
+
+SongHeader& SongHeader::operator =(const SongHeader& right){
+    this->id = right.id;
+    this->name = right.name;
+    this->size = right.size;
+    return *this;
+}
+
+bool SongHeader::operator ==(const SongHeader& right){
+    return this->name == right.name && this->size == right.size;
+}
+
+unsigned int SongHeader::getSize() const{
+    QByteArray size;
+    QDataStream stream(size);
+    stream << id << name << this->size;
+    return size.size();
+}
+
+Song::Song():
+    SongHeader()
+{
+    source.clear();
+}
+
+QDataStream& operator << (QDataStream& stream, const SongHeader& song){
+    stream << song.id;
+    stream << song.name;
+    stream << song.size;
+    return stream;
+}
+QDataStream& operator >> (QDataStream& stream, SongHeader& song){
+    stream >> song.id;
+    stream >> song.name;
+    stream >> song.size;
+    return stream;
+}
+
+Song::Song(const SongHeader& from)
+    :Song::Song()
+{
+    this->id = from.id;
+    this->name = from.name;
+    this->size = from.size;
+}
+
+void Song::clear(){
+    source.clear();
+}
+
+Song::~Song(){
+    source.clear();
+}
+
+unsigned int Song::getSize() const{
+    return SongHeader::getSize() + source.size();
+}
+
+QDataStream& operator << (QDataStream& stream,const Song& song){
+    stream << static_cast<const SongHeader&>(song);
+    stream << song.source;
+    return stream;
+}
+
+QDataStream& operator >> (QDataStream& stream, Song& song){
+    stream >> static_cast<SongHeader&>(song);
+    stream >> song.source;
+    return stream;
+}
+
+}
diff --git a/sync/song.h b/sync/song.h
new file mode 100644
index 0000000..a23a084
--- /dev/null
+++ b/sync/song.h
@@ -0,0 +1,66 @@
+#ifndef SONG_H
+#define SONG_H
+#include <QString>
+#include <QByteArray>
+#include <QDataStream>
+#include <config.h>
+/**
+ * @brief Time_point on nanosecunds (uint64_t)
+ */
+typedef quint64 milliseconds;
+
+namespace syncLib {
+
+/**
+ * @brief The Syncer struct
+ *
+ */
+struct Syncer
+{
+    /**
+     * @brief seek - wher is play media file
+     */
+    milliseconds seek;
+    /**
+     * @brief run when is play media file (int)
+     */
+    milliseconds run;
+};
+
+/**
+ * @brief The SongHeader class sound header with media information
+ * (id,size and name)
+ */
+class SongHeader
+{
+public:
+    int id;
+    QString name;
+    int size;
+    SongHeader();
+    SongHeader& operator = (const SongHeader& right);
+    bool operator == (const SongHeader& right);
+    virtual unsigned int getSize()const;
+    virtual ~SongHeader();
+    friend QDataStream& operator << (QDataStream& stream, const SongHeader& song);
+    friend QDataStream& operator >> (QDataStream& stream, SongHeader& song);
+};
+/**
+ * @brief The Song class
+ * into this calss added mediadata of playable media file.
+ */
+class Song : public SongHeader{
+private:
+    QByteArray source;
+public:
+    Song();
+    Song(const SongHeader& from);
+    void clear();
+    unsigned int getSize() const;
+    ~Song();
+    friend QDataStream& operator << (QDataStream& stream, const Song& song);
+    friend QDataStream& operator >> (QDataStream& stream, Song& song);
+    friend class Sync;
+};
+}
+#endif // SONG_H
diff --git a/sync/sync.cpp b/sync/sync.cpp
new file mode 100644
index 0000000..16d674d
--- /dev/null
+++ b/sync/sync.cpp
@@ -0,0 +1,350 @@
+#include "sync.h"
+#include <QtSql>
+#include <QMultimedia>
+#include <QMediaPlayer>
+#include <QSqlQuery>
+#include "exaptions.h"
+#include "time.h"
+#include "thread"
+
+#include "config.h"
+
+#ifdef QT_DEBUG
+#include <QDebug>
+#endif
+
+namespace syncLib{
+
+Sync::Sync(){
+    node = new Node();
+    player = new QMediaPlayer(nullptr,QMediaPlayer::LowLatency);
+    if(!player->isAvailable()){
+        throw MediaException();
+    }
+    initDB();
+    connect(node,SIGNAL(Message(ETcpSocket*)),SLOT(packageRender(ETcpSocket*)));
+    connect(&deepScaner,SIGNAL(scaned(QList<ETcpSocket*>*)),SLOT(deepScaned(QList<ETcpSocket*>*)));
+
+}
+
+void Sync::initDB(){
+    if(db) return;
+    *db = QSqlDatabase::addDatabase("QSQLITE");
+    QDir d(QString("./%0").arg(DATABASE_NAME));
+    db->setDatabaseName(d.absolutePath());
+    if(db->open()){
+        qyery = new QSqlQuery(*db);
+        QString qyer = QString("CREATE TABLE IF NOT EXISTS %0 "
+                     "id int NOT NULL AUTO_INCREMENT,"
+                     "name VARCHAR(100),"
+                     "size INT NOT NULL,"
+                     "data BLOB NOT NULL").arg(DATATABLE_NAME);
+        qyery->exec(qyer);
+    }
+}
+
+int Sync::save(const Song &song){
+    QString qyer = QString("INSERT INTO %0 (name, size, data) VALUES"
+                           "(%1,%2, :data)").arg(DATATABLE_NAME,
+                                                 song.name,
+                                                 QString::number(song.size));
+    qyery->prepare(qyer);
+    qyery->bindValue(":data",song.source);
+    if(!qyery->exec())
+        return -1;
+    if(qyery->exec(QString("SELECT MAAX(id) form %0").arg(DATATABLE_NAME)))
+        return -1;
+    return qyery->value(0).toInt();
+}
+
+bool Sync::load(const SongHeader &song,Song &result){
+    result.clear();
+    if(song.id > -1){
+        QString qyer = QString("SELECT * from %0 where id=%1").arg(DATATABLE_NAME).arg(song.id);
+        if(!qyery->exec(qyer)){
+            return false;
+        }
+    }else if(!song.name.isEmpty() && song.size > 0){
+        QString qyer = QString("SELECT * from %0 where name=%1 and size=%2").arg(DATATABLE_NAME).arg(song.name).arg(song.size);
+        if(!qyery->exec(qyer)){
+            return false;
+        }
+    }else {
+        return false;
+    }
+
+    result.id = qyery->value(0).toInt();
+    result.name = qyery->value(1).toString();
+    result.size = qyery->value(2).toInt();
+    result.source = qyery->value(3).toByteArray();
+    return true;
+}
+
+/*
+ * information about chrono
+ * https://stackoverflow.com/questions/31255486/c-how-do-i-convert-a-stdchronotime-point-to-long-and-back
+ */
+
+milliseconds Sync::now(){
+    auto tim = std::chrono::system_clock::now();
+    auto mc = std::chrono::time_point_cast<std::chrono::milliseconds>(tim);
+    auto epoh = mc.time_since_epoch();
+#ifdef QT_DEBUG
+    qDebug() << epoh.count();
+#endif
+    return epoh.count();
+}
+
+Clock Sync::from(const milliseconds& mc){
+    std::chrono::milliseconds dur(mc);
+    return Clock(dur);
+}
+
+bool Sync::play(const SongHeader &header, const Syncer *syncdata){
+    QString qyer = QString("SELECT * from %0 where name=%1 and size=%2").arg(DATATABLE_NAME).arg(header.name).arg(header.size);
+    if(!qyery->exec(qyer)){
+        return false;
+    }
+    Song song;
+    song.id = qyery->value(0).toInt();
+    song.name = qyery->value(1).toString();
+    song.size = qyery->value(2).toInt();
+    song.source = qyery->value(3).toByteArray();
+    return Sync::play(song,syncdata);
+}
+
+bool Sync::play(Song &song, Syncer *syncdata){
+    QBuffer buffer(&song.source);
+    player->setMedia(QMediaContent(), &buffer);
+    if(syncdata && !sync(*syncdata)){
+        return false;
+    }
+
+    fbroadcaster = !bool(syncdata);
+    if(fbroadcaster){
+        package pac;
+        if(!createPackage(t_song_h | t_sync, pac)){
+            throw CreatePackageExaption();
+        }
+        node->WriteAll(pac.parseTo());
+    }
+
+    player->play();
+    playList->push_front(static_cast<SongHeader>(song));
+    return true;
+}
+
+bool Sync::play(int id_song, Syncer *syncdata){
+
+    QString qyer = QString("SELECT * from %0 where id=%1").arg(DATATABLE_NAME).arg(id_song);
+    if(!qyery->exec(qyer)){
+        return false;
+    }
+    Song song;
+    song.id = qyery->value(0).toInt();
+    song.name = qyery->value(1).toString();
+    song.size = qyery->value(2).toInt();
+    song.source = qyery->value(3).toByteArray();
+    return Sync::play(song,syncdata);
+}
+
+bool Sync::play(QString url){
+    QFile f(url);
+    if(!f.open(QIODevice::ReadOnly)){
+        return false;
+    }
+    QByteArray bytes = f.readAll();
+    f.close();
+    QString name = url.right(url.lastIndexOf(QRegularExpression("[\\/]"))); // meby [[\\\/]]
+    Song song;
+    song.name = name;
+    song.size = bytes.size();
+    song.source = bytes;
+    song.id = Sync::save(song);
+    if(song.id < 0)
+        return false;
+    return Sync::play(song);
+}
+
+void Sync::pause(){
+    player->pause();
+}
+
+void Sync::stop(){
+    player->stop();
+}
+
+void Sync::jump(const int seek){
+    player->setPosition(seek);
+}
+
+bool Sync::sync(const Syncer &sync){
+    milliseconds sync_time  = sync.run - now();
+    if(sync_time > MAX_SYNC_TIME && sync_time <= 0)
+        return false;
+    Clock run_time = from(sync.run);
+    do {
+        std::this_thread::yield();
+    } while (std::chrono::high_resolution_clock::now() < run_time);
+    player->setPosition(sync.seek);
+    return true;
+}
+
+bool Sync::createPackage(Type type, package &pac){
+    pac.clear();
+
+    pac.type = type;
+
+    if(type & TypePackage::t_sync && fbroadcaster){
+
+        pac.playdata.run = now() + SYNC_TIME;
+        pac.playdata.seek = player->position() + SYNC_TIME;
+
+    }
+
+    if(type & TypePackage::t_song_h && fbroadcaster){
+        if(playList->isEmpty())
+            return false;
+
+        pac.header = playList->front();
+
+    }
+
+    if(type & TypePackage::t_song && fbroadcaster){
+        if(playList->isEmpty())
+            return false;
+
+        if(!load(playList->front(), pac.source))
+            return false;
+
+    }
+
+    if(fbroadcaster)
+        pac.type = TypePackage(pac.type | t_brodcaster);
+
+    return pac.isValid();
+}
+
+void Sync::packageRender(ETcpSocket *socket){
+
+    QByteArray *array;
+    while((array = socket->topStack())){
+        package pkg;
+        if(!pkg.parseFrom((*array))){
+            throw BadAnswerExaption();
+            continue;
+        }
+//     package answer;
+
+//     scaning servers
+
+        if(pkg.getType() & t_brodcaster && servers.indexOf(socket) == -1){
+            servers.append(socket);
+        }
+
+        if(!(pkg.getType() & t_brodcaster) && servers.indexOf(socket) != -1){
+            servers.removeOne(socket);
+        }
+
+        if(fbroadcaster == (pkg.getType() & t_brodcaster)){
+            throw BrodcastConflict();
+            return;
+        }
+
+        if(pkg.getType() & t_brodcaster){
+
+//            if requst from server
+
+            if(pkg.getType() & t_play){
+                player->play();
+            }
+
+            if((pkg.getType() & t_song_h) && !play(pkg.getHeader(), &pkg.getPlayData())){
+                if((pkg.getType() & t_song) && !play(pkg.getSong(), &pkg.getPlayData())){
+                    package answer;
+                    if(!createPackage(t_song | t_sync, answer)){
+                        throw CreatePackageExaption();
+                    }
+                    socket->Write(answer.parseTo());
+
+                }
+            }
+
+            if(pkg.getType() & t_close){
+                socket->getSource()->close();
+                node->getClients()->removeOne(socket);
+                delete socket;
+            }
+
+            if(pkg.getType() & t_what){
+                package answer;
+                if(!createPackage(t_void, answer)){
+                    throw CreatePackageExaption();
+                }
+                socket->Write(answer.parseTo());
+            }
+
+            if(pkg.getType() & t_sync){
+                if(playList->empty()){
+                    throw SyncError();
+                }
+            }
+
+        }else{
+
+            package answer;
+            if(!createPackage(pkg.getType() | ~t_what | ~t_play | ~t_stop | ~t_brodcaster, answer)){
+                throw CreatePackageExaption();
+            }
+            socket->Write(answer.parseTo());
+
+            if(pkg.getType() & t_close){
+                socket->getSource()->close();
+                node->getClients()->removeOne(socket);
+                delete socket;
+            }
+
+        }
+
+        array->clear();
+        delete array;
+
+    }
+}
+
+void Sync::rescan(bool deep){
+    package pac;
+    if(!createPackage(t_what,pac)){
+        throw CreatePackageExaption();
+        return;
+    }
+    node->WriteAll(pac.parseTo());
+
+    if(deep){
+       deepScaner.setInterval(DEEP_SCANER_INTERVAL);
+       deepScaner.scane();
+    }
+}
+
+void Sync::deepScaned(QList<ETcpSocket *> * list){
+    package pac;
+    if(!createPackage(t_what,pac)){
+        throw CreatePackageExaption();
+        return;
+    }
+    QByteArray array = pac.parseTo();
+    for(ETcpSocket * i: *list){
+        i->Write(array);
+    }
+}
+
+Sync::~Sync(){
+    delete node;
+    delete db;
+    delete player;
+    servers.clear();
+}
+
+}
+
+
diff --git a/sync/sync.h b/sync/sync.h
new file mode 100644
index 0000000..d64967e
--- /dev/null
+++ b/sync/sync.h
@@ -0,0 +1,143 @@
+#ifndef SYNC_H
+#define SYNC_H
+#include "song.h"
+#include "node.h"
+#include "LocalScanner.h"
+#include <chrono>
+class QSqlDatabase;
+class QMediaPlayer;
+class QSqlQuery;
+namespace syncLib {
+
+typedef std::chrono::time_point<std::chrono::high_resolution_clock> Clock;
+
+class Node;
+
+/**
+ * @brief The Sync class is main class of this library.
+ * the 'sync' has supported synced playning media files on network and saving media data into local database.
+ */
+class Sync : public QObject
+{
+    Q_OBJECT
+private:
+    Node *node;
+    QSqlDatabase *db;
+    QMediaPlayer *player;
+    QList<SongHeader>* playList;
+    QSqlQuery *qyery;
+    QList<ETcpSocket*> servers;
+    bool fbroadcaster;
+    LocalScanner deepScaner;
+
+
+    /**
+     * @brief rescan - search for existing servers
+     * result saved in servers
+     */
+    void rescan(bool deep = false);
+    /**
+     * @brief initDB initialize local database of song
+     */
+    void initDB();
+    /**
+     * @brief load song of database;
+     * @brief song -
+     * @brief result - the resulting value;
+     * @return true if everything's done
+     */
+    bool load(const SongHeader &song, Song &result);
+    /**
+     * @brief save media data into local database.
+     * @param song savining media data.
+     * @return id of song saved on local database.
+     */
+    int save(const Song &song);
+    /**
+     * @brief fromDataBase return a song from local database by id.
+     * @param id of song saved in local database.
+     * @return song drom local database.
+     */
+    Song fromDataBase(const int id);
+    /**
+     * @brief now - get now time on microsecunds
+     * @return - count of microsecunds
+     */
+    milliseconds now();
+    /**
+     * @brief from cast to chrono secunds
+     * @param mcrs microseconds of uint_64
+     * @return microseconds of chrono
+     */
+    Clock from(const milliseconds &mcrs);
+    /**
+     * @brief createPackage - Create a package that shows current state of the node
+     * @param type - Type of an answer
+     * @param pac - the resulting value
+     * @return true if everything's done
+     */
+    bool createPackage(Type type ,package& pac);
+private slots:
+
+    /**
+     * @brief packageRender - the handler of all messages received.
+     * @param socket
+     */
+    void packageRender(ETcpSocket* socket);
+    /**
+     * @brief deepScaned scaning in local network
+     */
+    void deepScaned(QList<ETcpSocket *> *);
+
+public:
+    /**
+     * @brief Play song in this device, if device has not supported playning media data this method throw MediaExcrption.
+     * @param header of song
+     * @param syncdata data of synbced playning of media data.
+     * @return true if all done else false.
+     */
+    bool play(const SongHeader &header,  const Syncer *syncdata = nullptr);
+    /**
+     * @brief Play song in this device, if device has not supported playning media data this method throw MediaExcrption.
+     * @param song playning media data.
+     * @param syncdata data of synbced playning of media data.
+     * @return true if all done else false.
+     */
+    bool play(Song &song, Syncer *syncdata = nullptr);
+    /**
+     * @brief Play song from local media file.
+     * @param url of local media file.
+     * @return true if all done else false.
+     */
+    bool play(QString url);
+    /**
+     * @brief Play song from local database by id.
+     * @param id_song of song.
+     * @return true if all done else false.
+     */
+    bool play(int id_song, Syncer* syncdata = nullptr);
+    /**
+     * @brief Pause playning song.
+     */
+    void pause();
+    /**
+     * @brief stop playning song.
+     */
+    void stop();
+    /**
+     * @brief jump - jump to new position of playning media data.
+     * @param seek - a new position of media data.
+     */
+    void jump(const int seek);
+    /**
+     * @brief sync with server
+     * @param sync - data of sync
+     */
+    bool sync(const Syncer& sync);
+    Sync();
+    ~Sync();
+};
+}
+
+
+#endif // SYNC_H
diff --git a/sync/sync.pro b/sync/sync.pro
new file mode 100644
index 0000000..a7e7377
--- /dev/null
+++ b/sync/sync.pro
@@ -0,0 +1,44 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2017-10-28T16:29:39
+#
+#-------------------------------------------------
+
+QT       += network multimedia sql
+
+QT       -= gui
+
+TARGET = sync
+TEMPLATE = lib
+CONFIG += staticlib
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+        sync.cpp \
+    song.cpp \
+    node.cpp \
+    ETcpSocket.cpp \
+    LocalScanner.cpp
+
+HEADERS += \
+        sync.h \
+    song.h \
+    node.h \
+    config.h \
+    exaptions.h \
+    ETcpSocket.h \
+    LocalScanner.h
+unix {
+    target.path = /usr/lib
+    INSTALLS += target
+}