This is how I usually do basic idles in a layered approach, hope it helps :)
Free Link rig by Christoph (The Stoff) Schoch:
gumroad.com/thestoff#lFnryq
Song:
Artist: Retro Remix Revue
Track: Gerudo Valley (Legend of Zelda - Ocarina of Time)
Composer: Koji Kondo
Arranged by: Blaine McGurty
Performered by: Ramon Stagnaro (Acoustic Guitar), Gary Grant (Trumpet), Trey Henry (Acoustic Bass), Simon Carroll (Percussion)
Album: Retro Remix Revue Vol.2
Year: 2009
youtu.be/LgAJL2TA1kI