Possible Clues:

• The notes you check yourself
• The burden is, don't
• Don't do that - it's a song
• Hold the burden
• Stop for air
• Don't be so inclined to be so musical
• Much repeated saying about folly initially leading to downfall?
• Main part of song - do not do it
• Burden, having brother in control
• Resist the impulse to spit on umpire first