I have downloaded Track ID application on my Samsung galaxy advance mobile. my experience regarding Track ID is as under:-
Track ID listen music and then display details of music and give option for download or play.
First of all you have to play song on your TV sound should be clear without noise.Next you have to keep your mobile opposite to TV sound and then mobile screen display seeking rounds after that if success result comes with detail of song otherwise try again.As per my experience you try 10 time and success one time
If success for download you need 7Digital application on your mobile which is not available.For playing music you should have link with youtube which is available.There is another similiar application SOUNDHOUND same trouble is with that.For 100% result Track ID should update application.