"Slack Key Guitar Volume 2" received a GRAMMY® Award for the inaugural Best Hawaiian Music Album category. This Producer's Award went to Charles Michael Brotman. The recording features 10 slack key artists, each with their own tuning and style ranging from traditional to contemporary: Brian Kessler, Ken Emerson, Keoki Kahumoku, Randy Lorenzo, Sonny Lim, John Keawe, John Cruz, Jeff Peterson, Charlie Recaido and Charles Brotman.

Ki ho’alu, or slack key, refers to the altered tunings of the acoustic guitar which are unique to the musical heritage of Hawai’i. The unusual harmonies of slack key are synonymous with the beauty of the islands. The album was recorded in the heart of Paniolo country where there is a rich heritage of ki ho'alu. It is the sequel to “Slack Key Guitar”, a Na Hoku Hanohano Award finalist.