Depends how anal/OCD you are and how many channels you have and the song itself.. Are you looking to just light something up on a beat, or are you trying to light up a specific prop each time for a certain beat. The singing faces are actually the easiest part. For me...if I can stay focused (not a chance), at least 20 hours per song. One of the issues I have is that I program it in small pieces, then when I run the whole thing, the timing has drifted. it might only be 1 or 2 tenths of a second, but it's noticeable and you have to run the whole sequence over and over again to verify you got it right....that adds up. I did three and a half songs the first year I had my lightorama and am hoping to finish the 1/2 one and add two more this year. It's something one should do on those cold nights in January and February,but I held out until the end of September.....ugh....How long does it take to program a song, great job !