Playing along songs...

Would this be a good idea, having a new type of content with songs concisting of several audio tracks, including vocals... where you could choose one of the tracks to play along with the orriginal performance on guitar, brass, piano or even drums... (and sing on top of that as 1st or 2nd voice)..... including music sheets for each part..

I think this would be a perfect thing for many young aspiring keyboardists that are still learning .. it would also help them playing along with other musicians..


They could even have a voice trainer with this system, much like the sing along songs on consoles, showing you how far your vocals are off from the orriginal..