The album has a bluegrass or progressive bluegrass core ; bluegrass mandolinist PERSON@1 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 '' .

Bluegrass mandolin player PERSON@1 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 '' .
