Original: The album has a bluegrass or progressive bluegrass core ; bluegrass mandolinist Ronnie McCoury became the album 's official '' bluegrass guru '' to ensure that there was '' someone who could make sure we did n't do anything clichéd or trite '' .
Simplified: Bluegrass mandolin player Ronnie McCoury became the album 's official '' bluegrass guru '' to make sure that there was '' someone who could make sure we did n't do anything clichéd or trite '' .