diff --git a/web/app/controllers/api_music_sessions_controller.rb b/web/app/controllers/api_music_sessions_controller.rb
index b85f265d0..20d34b823 100644
--- a/web/app/controllers/api_music_sessions_controller.rb
+++ b/web/app/controllers/api_music_sessions_controller.rb
@@ -4,7 +4,7 @@ class ApiMusicSessionsController < ApiController
 
   # have to be signed in currently to see this screen
   before_filter :api_signed_in_user, :except => [ :add_like, :show, :show_history, :add_session_info_comment ]
-  before_filter :lookup_session,   only: [:show, :update, :delete, :claimed_recording_start, :claimed_recording_stop, :track_sync, :jam_track_open, :jam_track_close]
+  before_filter :lookup_session,   only: [:show, :update, :delete, :claimed_recording_start, :claimed_recording_stop, :track_sync, :jam_track_open, :jam_track_close, :backing_track_open, :backing_track_close, :metronome_open, :metronome_close]
   skip_before_filter :api_signed_in_user, only: [:perf_upload]
 
   respond_to :json
@@ -597,8 +597,44 @@ class ApiMusicSessionsController < ApiController
     respond_with_model(@music_session)
   end
 
+  def backing_track_open
+    unless @music_session.users.exists?(current_user)
+      raise PermissionError, ValidationMessages::PERMISSION_VALIDATION_ERROR
+    end
 
-  private
+    @backing_track_path = params[:backing_track_path]    
+    @music_session.open_backing_track(current_user, @backing_track_path)
+    respond_with_model(@music_session)
+  end
+
+  def backing_track_close
+    unless @music_session.users.exists?(current_user)
+      raise PermissionError, ValidationMessages::PERMISSION_VALIDATION_ERROR
+    end
+
+    @music_session.close_backing_track()
+    respond_with_model(@music_session)
+  end
+
+  def metronome_open
+    unless @music_session.users.exists?(current_user)
+      raise PermissionError, ValidationMessages::PERMISSION_VALIDATION_ERROR
+    end
+
+    @music_session.open_metronome(current_user)
+    respond_with_model(@music_session)
+  end
+
+  def metronome_close
+    unless @music_session.users.exists?(current_user)
+      raise PermissionError, ValidationMessages::PERMISSION_VALIDATION_ERROR
+    end
+
+    @music_session.close_metronome()
+    respond_with_model(@music_session)
+  end
+
+private
 
   def lookup_session
     @music_session = ActiveMusicSession.find(params[:id])
diff --git a/web/config/routes.rb b/web/config/routes.rb
index 2a18c7fce..befe50ffb 100644
--- a/web/config/routes.rb
+++ b/web/config/routes.rb
@@ -178,6 +178,10 @@ SampleApp::Application.routes.draw do
     match '/sessions/:id/details/comments' => 'api_music_sessions#add_session_info_comment', :via => :post
     match '/sessions/:id/jam_tracks/:jam_track_id/open' => 'api_music_sessions#jam_track_open', :via => :post
     match '/sessions/:id/jam_tracks/close' => 'api_music_sessions#jam_track_close', :via => :post
+    match '/sessions/:id/backing_tracks/:backing_track_id/open' => 'api_music_sessions#backing_track_open', :via => :post
+    match '/sessions/:id/backing_tracks/close' => 'api_music_sessions#backing_track_close', :via => :post
+    match '/sessions/:id/jam_tracks/:metronome_id/open' => 'api_music_sessions#metronome_open', :via => :post
+    match '/sessions/:id/metronomes/close' => 'api_music_sessions#metronome_close', :via => :post
 
     # music session tracks
     match '/sessions/:id/tracks' => 'api_music_sessions#track_create', :via => :post
diff --git a/web/spec/controllers/api_music_sessions_controller_spec.rb b/web/spec/controllers/api_music_sessions_controller_spec.rb
index eab77192b..27565dd55 100644
--- a/web/spec/controllers/api_music_sessions_controller_spec.rb
+++ b/web/spec/controllers/api_music_sessions_controller_spec.rb
@@ -223,4 +223,87 @@ describe ApiMusicSessionsController do
       json[:jam_track][:id].should == jam_track.id
     end
   end
+
+  describe "open_backing_track" do
+
+    let(:ams) { FactoryGirl.create(:active_music_session, creator: user) }
+    let(:backing_track) { "foo.mp3"}
+
+    it "does not allow someone to open a track unless they are in the session" do
+      post :backing_track_open, {:format => 'json', id: ams.id, backing_track_path: backing_track}
+      response.status.should == 403
+    end
+
+    it "does not allow someone to open a track unless they own the backing track" do
+      pending "connection with client to determine ownership"
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+
+      post :backing_track_open, {:format => 'json', id: ams.id, backing_track_path: backing_track}
+      response.status.should == 403
+    end
+
+    it "allows someone who owns the backing track to open it" do
+      # put the connection of the user into the session, so th
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+      
+      post :backing_track_open, {:format => 'json', id: ams.id, backing_track_path: backing_track}
+      response.status.should == 200
+    end
+
+    it "does not allow someone to close a track unless they are in the session" do
+      post :backing_track_close, {:format => 'json', id: ams.id}
+      response.status.should == 403
+    end
+
+    it "allows the backing track to be closed" do
+      # put the connection of the user into the session, so th
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+      
+      post :backing_track_open, {:format => 'json', id: ams.id, backing_track_path: backing_track}
+      response.status.should == 200
+
+      post :backing_track_close, {:format => 'json', id: ams.id}
+      response.status.should == 200
+    end
+  end
+
+  describe "open_metronome" do
+
+    let(:ams) { FactoryGirl.create(:active_music_session, creator: user) }
+    let(:metronome) { "foo.mp3"}
+
+    it "does not allow someone to open a track unless they are in the session" do
+      post :metronome_open, {:format => 'json', id: ams.id, metronome_path: metronome}
+      response.status.should == 403
+    end
+
+    it "can open it" do
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+      
+      post :metronome_open, {:format => 'json', id: ams.id, metronome_path: metronome}
+      response.status.should == 200
+    end
+
+    it "does not allow someone to close a metronome" do
+      post :metronome_close, {:format => 'json', id: ams.id}
+      response.status.should == 403
+    end
+
+    it "does allow someone who joied to close a metronome" do
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+      post :metronome_close, {:format => 'json', id: ams.id}
+      response.status.should == 200
+    end
+
+    it "allows the metronome to be closed" do
+      # put the connection of the user into the session, so th
+      conn.join_the_session(ams.music_session, true, tracks, user, 10)
+      
+      post :metronome_open, {:format => 'json', id: ams.id, metronome_path: metronome}
+      response.status.should == 200
+
+      post :metronome_close, {:format => 'json', id: ams.id}
+      response.status.should == 200
+    end
+  end
 end