Hi all-
PBS has a show called "Bluegrass Underground", video'd in a cave, in HD video and great sound. I am a caver, and also enjoy bluegrass, country(not mainstream), and Americana music. For me, this is the best of both worlds. The country group Jason Isbell & the 400 Unit used a Mellotron M4000D in their set. It was used in the 2nd number, and was subtle in the mix (I couldn't ID the voice). It was late, and I had to shut it off after that (no DVR).
This is a show worth seeking out, both for the music and the setting. It is performed in front of an small audience in the Volcano room, one of the larger rooms of Cumberland Caverns in Tennesee. Interesting lighting, along with a large chandelier help the setting. Equipment is brought in via an actual one-lane auto trail. Humidity is always above 95%, so sweating is evident, and I'm sure the instruments are brought outside ASAP after the shows. One of the better sets last year was by the duo the Civil Wars.
-Bruce D.