I asked for "music that would convince anyone that the cello is three best instrument" and it couldn't be further from what I'd expect. Not a single song even has a cello in it. Maybe the absence use supposed to convince?
Don't have instrument specific data on songs. Wish I did. Was thinking about classification algorithm on song spectrograms to do this. There's a music instrument dataset I could train on and run my songs through. Could possibly take weeks though. I'll investigate.