Pausing sounds with SoundCloud API

I'm fairly new to JS and I'm having trouble getting audio that is currently playing to pause or stop using the SoundCloud JavaScript SDK. I'm using a MEAN stack.

In the 'ready' function I initialize the SC player:

SC.initialize({
    client_id: "my_client_ID",
    redirect_uri: "http://ift.tt/1v0LYB0",
});

...

$('#trackList table tbody').on('click', 'td a.linkplaytrack', playTrack);
$('#trackList table tbody').on('click', 'td a.linkpausetrack', pauseTrack);

The playTrack function works fine and audio starts playing:

function playTrack(event){
    event.preventDefault();

    SC.stream("/tracks/293", function(sound){
        sound.play();
    });
};

But for some reason the pauseTrack function doesn't work:

function pauseTrack(event){
    event.preventDefault();

    SC.stream("/tracks/293", function(sound){
        sound.pause();
    });
};

Any help, insights or suggestions would be appreciated!