diff --git a/db/manifest b/db/manifest
index 14623b9b8..a95040283 100755
--- a/db/manifest
+++ b/db/manifest
@@ -249,3 +249,4 @@ recorded_backing_tracks.sql
 user_model_about_changes.sql
 performance_samples.sql
 user_presences.sql
+recorded_backing_tracks_add_filename.sql
\ No newline at end of file
diff --git a/db/up/recorded_backing_tracks_add_filename.sql b/db/up/recorded_backing_tracks_add_filename.sql
new file mode 100644
index 000000000..af959b9d5
--- /dev/null
+++ b/db/up/recorded_backing_tracks_add_filename.sql
@@ -0,0 +1 @@
+ALTER TABLE recorded_backing_tracks ADD COLUMN filename VARCHAR NOT NULL;
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/models/backing_track.rb b/ruby/lib/jam_ruby/models/backing_track.rb
index 66304e333..7437b2de7 100644
--- a/ruby/lib/jam_ruby/models/backing_track.rb
+++ b/ruby/lib/jam_ruby/models/backing_track.rb
@@ -9,6 +9,7 @@ module JamRuby
     belongs_to :connection, :class_name => "JamRuby::Connection", :inverse_of => :tracks, :foreign_key => 'connection_id'
     validates :connection, presence: true
     validates :client_track_id, presence: true
+    validates :filename, presence: true
 
     def user
       self.connection.user
diff --git a/ruby/lib/jam_ruby/models/recorded_backing_track.rb b/ruby/lib/jam_ruby/models/recorded_backing_track.rb
index d3b3493ae..4d8d5ff35 100644
--- a/ruby/lib/jam_ruby/models/recorded_backing_track.rb
+++ b/ruby/lib/jam_ruby/models/recorded_backing_track.rb
@@ -8,11 +8,23 @@ module JamRuby
     def self.create_from_backing_track(backing_track, recording) 
       recorded_backing_track = self.new
       recorded_backing_track.recording = recording
-      recorded_backing_track.client_backing_track_id = backing_track.client_backing_track_id
+      recorded_backing_track.client_id = backing_track.connection.client_id
+      recorded_backing_track.backing_track_id = backing_track.id
+      recorded_backing_track.client_track_id = backing_track.client_track_id
       recorded_backing_track.user = backing_track.connection.user
-      recorded_backing_track.save      
+      recorded_backing_track.filename = backing_track.filename
+      recorded_backing_track.next_part_to_upload = 0
+      recorded_backing_track.file_offset = 0
+      recorded_backing_track[:url] = construct_filename(recording.created_at, recording.id, backing_track.client_track_id)
+      recorded_backing_track.save
       recorded_backing_track
     end
 
+    private
+
+    def self.construct_filename(created_at, recording_id, client_track_id)
+      raise "unknown ID" unless client_track_id
+      "recordings/#{created_at.strftime('%m-%d-%Y')}/#{recording_id}/backing-track-#{client_track_id}.ogg"
+    end
   end  
 end
diff --git a/ruby/lib/jam_ruby/models/recording.rb b/ruby/lib/jam_ruby/models/recording.rb
index ca1c241ef..cf1597ef3 100644
--- a/ruby/lib/jam_ruby/models/recording.rb
+++ b/ruby/lib/jam_ruby/models/recording.rb
@@ -180,6 +180,14 @@ module JamRuby
       recorded_tracks.where(:user_id => user.id)
     end
 
+    def recorded_backing_tracks_for_user(user)
+      unless self.users.exists?(user)
+        raise PermissionError, "user was not in this session"
+      end
+      recorded_backing_tracks.where(:user_id => user.id)
+    end
+
+
     def has_access?(user)
       users.exists?(user)
     end
@@ -212,7 +220,7 @@ module JamRuby
             end
 
             connection.backing_tracks.each do |backing_track|
-              recording.recorded_videos << RecordedBackingTrack.create_from_backing_track(backing_track, recording)
+              recording.recorded_backing_tracks << RecordedBackingTrack.create_from_backing_track(backing_track, recording)
             end
           end
         end
diff --git a/ruby/lib/jam_ruby/models/track.rb b/ruby/lib/jam_ruby/models/track.rb
index 10b7ecb40..c06ad2d7a 100644
--- a/ruby/lib/jam_ruby/models/track.rb
+++ b/ruby/lib/jam_ruby/models/track.rb
@@ -55,11 +55,64 @@ module JamRuby
       return query
     end
 
+    def self.diff_track(track_class, existing_tracks, new_tracks, &blk)
+      result = []
+      if new_tracks.length == 0
+        existing_tracks.delete_all
+      else
+
+        # we will prune from this as we find matching tracks
+        to_delete = Set.new(existing_tracks)
+        to_add = Array.new(new_tracks)
+
+        existing_tracks.each do |existing_track|
+          new_tracks.each do |new_track|
+
+            if new_track[:id] == existing_track.id || new_track[:client_track_id] == existing_track.client_track_id
+              to_delete.delete(existing_track)
+              to_add.delete(new_track)
+
+              blk.call(existing_track, new_track)
+
+              result.push(existing_track)
+
+              if existing_track.save
+                next
+              else
+                result = existing_track
+                raise ActiveRecord::Rollback
+              end
+            end
+          end
+        end
+
+
+        to_add.each do |new_track|
+          existing_track = track_class.new
+
+          blk.call(existing_track, new_track)
+
+          if existing_track.save
+            result.push(existing_track)
+          else
+            result = existing_track
+            raise ActiveRecord::Rollback
+          end
+        end
+
+        to_delete.each do |delete_me|
+          delete_me.delete
+        end
+      end
+      result
+    end
 
     # this is a bit different from a normal track synchronization in that the client just sends up all tracks,
     # ... some may already exist
-    def self.sync(clientId, tracks)
-      result = []
+    def self.sync(clientId, tracks, backing_tracks = [])
+      result = {}
+
+      backing_tracks = [] unless backing_tracks
 
       Track.transaction do
         connection = Connection.find_by_client_id!(clientId)
@@ -68,67 +121,28 @@ module JamRuby
         msh = MusicSessionUserHistory.find_by_client_id!(clientId)
         instruments = []
 
-        if tracks.length == 0
-          connection.tracks.delete_all
-        else
-          connection_tracks = connection.tracks
+        tracks.each do |track|
+          instruments << track[:instrument_id]
+        end
 
-          # we will prune from this as we find matching tracks
-          to_delete = Set.new(connection_tracks)
-          to_add = Array.new(tracks)
+        result[:tracks] = diff_track(Track, connection.tracks, tracks) do |track_record, track_info|
+          track_record.connection = connection
+          track_record.client_track_id = track_info[:client_track_id]
+          track_record.client_resource_id = track_info[:client_resource_id]
+          track_record.instrument_id = track_info[:instrument_id]
+          track_record.sound = track_info[:sound]
+        end
 
-          tracks.each do |track|
-            instruments << track[:instrument_id]
-          end
+        result[:backing_tracks] = diff_track(BackingTrack, connection.backing_tracks, backing_tracks)  do |track_record, track_info|
+          track_record.connection = connection
+          track_record.client_track_id = track_info[:client_track_id]
+          track_record.client_resource_id = track_info[:client_resource_id]
+          track_record.filename = track_info[:filename]
+        end
 
-          connection_tracks.each do |connection_track|
-            tracks.each do |track|
-
-              if track[:id] == connection_track.id || track[:client_track_id] == connection_track.client_track_id
-                to_delete.delete(connection_track)
-                to_add.delete(track)
-                # don't update connection_id or client_id; it's unknown what would happen if these changed mid-session
-                connection_track.instrument_id = track[:instrument_id]
-                connection_track.sound = track[:sound]
-                connection_track.client_track_id = track[:client_track_id]
-                connection_track.client_resource_id = track[:client_resource_id]
-
-                result.push(connection_track)
-
-                if connection_track.save
-                  next
-                else
-                  result = connection_track
-                  raise ActiveRecord::Rollback
-                end
-
-              end
-            end
-          end
-
-          msh.instruments = instruments.join("|")
-          if !msh.save
-            raise ActiveRecord::Rollback
-          end
-
-          to_add.each do |track|
-            connection_track = Track.new
-            connection_track.connection = connection
-            connection_track.instrument_id = track[:instrument_id]
-            connection_track.sound = track[:sound]
-            connection_track.client_track_id = track[:client_track_id]
-            connection_track.client_resource_id = track[:client_resource_id]
-            if connection_track.save
-              result.push(connection_track)
-            else
-              result = connection_track
-              raise ActiveRecord::Rollback
-            end
-          end
-
-          to_delete.each do |delete_me|
-            delete_me.delete
-          end
+        msh.instruments = instruments.join("|")
+        if !msh.save
+          raise ActiveRecord::Rollback
         end
       end
 
diff --git a/ruby/lib/jam_ruby/models/user.rb b/ruby/lib/jam_ruby/models/user.rb
index 30bde5246..3bb4c270a 100644
--- a/ruby/lib/jam_ruby/models/user.rb
+++ b/ruby/lib/jam_ruby/models/user.rb
@@ -122,6 +122,7 @@ module JamRuby
     # saved tracks
     has_many :recorded_tracks, :foreign_key => "user_id", :class_name => "JamRuby::RecordedTrack", :inverse_of => :user
     has_many :recorded_videos, :foreign_key => "user_id", :class_name => "JamRuby::RecordedVideo", :inverse_of => :user
+    has_many :recorded_backing_tracks, :foreign_key => "user_id", :class_name => "JamRuby::RecordedBackingTrack", :inverse_of => :user
     has_many :quick_mixes, :foreign_key => "user_id", :class_name => "JamRuby::QuickMix", :inverse_of => :user
 
     # invited users
diff --git a/ruby/spec/jam_ruby/models/recording_spec.rb b/ruby/spec/jam_ruby/models/recording_spec.rb
index a151bb43f..d2fd7c3b0 100644
--- a/ruby/spec/jam_ruby/models/recording_spec.rb
+++ b/ruby/spec/jam_ruby/models/recording_spec.rb
@@ -211,6 +211,20 @@ describe Recording do
     user1_recorded_tracks[0].discard = true
     user1_recorded_tracks[0].save!
   end
+
+  it "should allow finding of backing tracks" do
+    user2 = FactoryGirl.create(:user)
+    connection2 = FactoryGirl.create(:connection, :user => user2, :music_session => @music_session)
+    track2 = FactoryGirl.create(:track, :connection => connection2, :instrument => @instrument)
+    backing_track = FactoryGirl.create(:backing_track, :connection => connection2)
+
+
+    @recording = Recording.start(@music_session, @user)
+    @recording.recorded_backing_tracks_for_user(@user).length.should eq(0)
+    user2_recorded_tracks = @recording.recorded_backing_tracks_for_user(user2)
+    user2_recorded_tracks.length.should == 1
+    user2_recorded_tracks[0].should == user2.recorded_backing_tracks[0]
+  end
   
   it "should set up the recording properly when recording is started with 1 user in the session" do
     @music_session.is_recording?.should be_false
diff --git a/ruby/spec/jam_ruby/models/track_spec.rb b/ruby/spec/jam_ruby/models/track_spec.rb
index 1e03d123b..4b27ad062 100644
--- a/ruby/spec/jam_ruby/models/track_spec.rb
+++ b/ruby/spec/jam_ruby/models/track_spec.rb
@@ -7,8 +7,10 @@ describe Track do
   let (:connection) { FactoryGirl.create(:connection, :user => user, :music_session => music_session) }
   let (:track) { FactoryGirl.create(:track, :connection => connection)}
   let (:track2) { FactoryGirl.create(:track, :connection => connection)}
+  let (:backing_track) { FactoryGirl.create(:backing_track, :connection => connection)}
   let (:msuh) {FactoryGirl.create(:music_session_user_history, :history => music_session.music_session, :user => user, :client_id => connection.client_id) }
   let (:track_hash) { {:client_track_id => 'client_guid', :sound => 'stereo', :instrument_id => 'drums'} }
+  let (:backing_track_hash) { {:client_track_id => 'client_guid', :filename => "blah.wav"} }
 
   before(:each) do
     msuh.touch
@@ -16,7 +18,8 @@ describe Track do
 
   describe "sync" do
     it "create one track" do
-      tracks = Track.sync(connection.client_id, [track_hash])
+      result = Track.sync(connection.client_id, [track_hash])
+      tracks = result[:tracks]
       tracks.length.should == 1
       track = tracks[0]
       track.client_track_id.should == track_hash[:client_track_id]
@@ -25,7 +28,8 @@ describe Track do
     end
 
     it "create two tracks" do
-      tracks = Track.sync(connection.client_id, [track_hash, track_hash])
+      result = Track.sync(connection.client_id, [track_hash, track_hash])
+      tracks = result[:tracks]
       tracks.length.should == 2
       track = tracks[0]
       track.client_track_id.should == track_hash[:client_track_id]
@@ -40,7 +44,8 @@ describe Track do
     it "delete only track" do
       track.id.should_not  be_nil
       connection.tracks.length.should == 1
-      tracks = Track.sync(connection.client_id, [])
+      result = Track.sync(connection.client_id, [])
+      tracks = result[:tracks]
       tracks.length.should == 0
     end
 
@@ -49,7 +54,8 @@ describe Track do
       track.id.should_not be_nil
       track2.id.should_not be_nil
       connection.tracks.length.should == 2
-      tracks = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => 'client_guid_new', :sound => 'mono', :instrument_id => 'drums'}])
+      result = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => 'client_guid_new', :sound => 'mono', :instrument_id => 'drums'}])
+      tracks = result[:tracks]
       tracks.length.should == 1
       found = tracks[0]
       found.id.should == track.id
@@ -62,7 +68,8 @@ describe Track do
       track.id.should_not be_nil
       track2.id.should_not be_nil
       connection.tracks.length.should == 2
-      tracks = Track.sync(connection.client_id, [{:client_track_id => track.client_track_id, :sound => 'mono', :instrument_id => 'drums'}])
+      result = Track.sync(connection.client_id, [{:client_track_id => track.client_track_id, :sound => 'mono', :instrument_id => 'drums'}])
+      tracks = result[:tracks]
       tracks.length.should == 1
       found = tracks[0]
       found.id.should == track.id
@@ -75,7 +82,8 @@ describe Track do
       track.id.should_not be_nil
       connection.tracks.length.should == 1
       set_updated_at(track, 1.days.ago)
-      tracks = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => 'client_guid_new', :sound => 'mono', :instrument_id => 'drums'}])
+      result = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => 'client_guid_new', :sound => 'mono', :instrument_id => 'drums'}])
+      tracks = result[:tracks]
       tracks.length.should == 1
       found = tracks[0]
       found.id.should == track.id
@@ -87,7 +95,8 @@ describe Track do
     it "updates a single track using .client_track_id to correlate" do
       track.id.should_not be_nil
       connection.tracks.length.should == 1
-      tracks = Track.sync(connection.client_id, [{:client_track_id => track.client_track_id, :sound => 'mono', :instrument_id => 'drums'}])
+      result = Track.sync(connection.client_id, [{:client_track_id => track.client_track_id, :sound => 'mono', :instrument_id => 'drums'}])
+      tracks = result[:tracks]
       tracks.length.should == 1
       found = tracks[0]
       found.id.should == track.id
@@ -99,11 +108,69 @@ describe Track do
       track.id.should_not be_nil
       connection.tracks.length.should == 1
       set_updated_at(track, 1.days.ago)
-      tracks = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => track.client_track_id, :sound => track.sound, :instrument_id => track.instrument_id, client_resource_id: track.client_resource_id}])
+      result = Track.sync(connection.client_id, [{:id => track.id, :client_track_id => track.client_track_id, :sound => track.sound, :instrument_id => track.instrument_id, client_resource_id: track.client_resource_id}])
+      tracks = result[:tracks]
       tracks.length.should == 1
       found = tracks[0]
       expect(found.id).to eq track.id
       expect(found.updated_at.to_i).to eq track.updated_at.to_i
     end
+
+    describe "backing tracks" do
+      it "create one track and one backing track" do
+        result = Track.sync(connection.client_id, [track_hash], [backing_track_hash])
+        tracks = result[:tracks]
+        tracks.length.should == 1
+        track = tracks[0]
+        track.client_track_id.should == track_hash[:client_track_id]
+        track.sound = track_hash[:sound]
+        track.instrument.should == Instrument.find('drums')
+
+        backing_tracks = result[:backing_tracks]
+        backing_tracks.length.should == 1
+        track = backing_tracks[0]
+        track.client_track_id.should == backing_track_hash[:client_track_id]
+      end
+
+      it "delete only backing_track" do
+        track.id.should_not be_nil
+        backing_track.id.should_not be_nil
+        connection.tracks.length.should == 1
+        connection.backing_tracks.length.should == 1
+        result = Track.sync(connection.client_id,
+                            [{:id => track.id, :client_track_id => track.client_track_id, :sound => track.sound, :instrument_id => track.instrument_id, client_resource_id: track.client_resource_id}],
+                            [])
+        tracks = result[:tracks]
+        tracks.length.should == 1
+        found = tracks[0]
+        expect(found.id).to eq track.id
+        expect(found.updated_at.to_i).to eq track.updated_at.to_i
+
+        backing_tracks = result[:backing_tracks]
+        backing_tracks.length.should == 0
+      end
+
+      it "does not touch updated_at when nothing changes" do
+        track.id.should_not be_nil
+        backing_track.id.should_not be_nil
+        connection.tracks.length.should == 1
+        set_updated_at(track, 1.days.ago)
+        set_updated_at(backing_track, 1.days.ago)
+        result = Track.sync(connection.client_id,
+                            [{:id => track.id, :client_track_id => track.client_track_id, :sound => track.sound, :instrument_id => track.instrument_id, client_resource_id: track.client_resource_id}],
+                            [{:id => backing_track.id, :client_track_id => backing_track.client_track_id, :filename => backing_track.filename, client_resource_id: backing_track.client_resource_id}])
+        tracks = result[:tracks]
+        tracks.length.should == 1
+        found = tracks[0]
+        expect(found.id).to eq track.id
+        expect(found.updated_at.to_i).to eq track.updated_at.to_i
+
+        backing_tracks = result[:backing_tracks]
+        backing_tracks.length.should == 1
+        found = backing_tracks[0]
+        expect(found.id).to eq backing_track.id
+        expect(found.updated_at.to_i).to eq backing_track.updated_at.to_i
+      end
+    end
   end
 end
\ No newline at end of file
diff --git a/web/app/assets/javascripts/dialog/openBackingTrackDialog.js b/web/app/assets/javascripts/dialog/openBackingTrackDialog.js
index b1297c2e1..309084c82 100644
--- a/web/app/assets/javascripts/dialog/openBackingTrackDialog.js
+++ b/web/app/assets/javascripts/dialog/openBackingTrackDialog.js
@@ -46,18 +46,19 @@
 
     function getBackingTracks(page) {
 
-      var backingTracks = context.jamClient.getBackingTrackList();
-      console.log("Backing Tracks: ", backingTracks)
+      var result = context.jamClient.getBackingTrackList();
+      console.log("result", result)
+      var backingTracks = result.backing_tracks;
           
-      if (typeof(backingTracks)=="undefined") {
+      if (!backingTracks || backingTracks.length == 0) {
         $tbody.append("<tr><td colspan='100%'>No Tracks found</td></tr>");
       } else {
         $.each(backingTracks, function(index, backingTrack) {
           var options = {
             backingTrackState: null,
-            path: backingTrack.path,
-            name: backingTrack.name
-            //length: backingTrack.length ? backingTrack.length : 0
+            path: backingTrack.name,
+            name: backingTrack.name,
+            length: backingTrack.size ? backingTrack.size : 0
           }
           var $tr = $(context._.template($templateOpenBackingTrackRow.html(), options, { variable: 'data' }));
           $tr.data('server-model', backingTrack);
diff --git a/web/app/assets/javascripts/fakeJamClient.js b/web/app/assets/javascripts/fakeJamClient.js
index 9d64bd256..406e4b7b0 100644
--- a/web/app/assets/javascripts/fakeJamClient.js
+++ b/web/app/assets/javascripts/fakeJamClient.js
@@ -786,10 +786,10 @@
         }
 
         function getBackingTrackList() {
-            return [
-              {name:'foo',path:"foobar.mp3", length:4283},
-              {name:'bar',path:"foo.mp3",length:3257}
-            ];
+            return {backing_tracks: [
+              {name:"foobar.mp3", size:4283},
+              {name:"foo.mp3",size:3257}
+            ]};
         }
 
         function ClientUpdateStartUpdate(path, successCallback, failureCallback) {}
diff --git a/web/app/controllers/api_music_sessions_controller.rb b/web/app/controllers/api_music_sessions_controller.rb
index 20d34b823..e5f6a7bd4 100644
--- a/web/app/controllers/api_music_sessions_controller.rb
+++ b/web/app/controllers/api_music_sessions_controller.rb
@@ -357,7 +357,7 @@ class ApiMusicSessionsController < ApiController
   end
 
   def track_sync
-    @tracks = MusicSessionManager.new.sync_tracks(@music_session, params[:client_id], params[:tracks])
+    @tracks = MusicSessionManager.new.sync_tracks(@music_session, params[:client_id], params[:tracks], params[:backing_tracks])
 
     unless @tracks.kind_of? Array
       # we have to do this because api_session_detail_url will fail with a bad @tracks
diff --git a/web/lib/music_session_manager.rb b/web/lib/music_session_manager.rb
index a8259c804..706b41d83 100644
--- a/web/lib/music_session_manager.rb
+++ b/web/lib/music_session_manager.rb
@@ -140,10 +140,10 @@ class MusicSessionManager < BaseManager
     Notification.send_session_depart(active_music_session, connection.client_id, user, recordingId)
   end
 
-  def sync_tracks(active_music_session, client_id, new_tracks)
+  def sync_tracks(active_music_session, client_id, new_tracks, backing_tracks)
     tracks = nil
     active_music_session.with_lock do # VRFS-1297
-      tracks = Track.sync(client_id, new_tracks)
+      tracks = Track.sync(client_id, new_tracks, backing_tracks)
       active_music_session.tick_track_changes
     end
     Notification.send_tracks_changed(active_music_session)