Turtle Island Quartet mastermind David Balakrishnan has gotten his genre-expanding colleagues to adventure with him through a long piece of his own — ‘Tree of Life’ — in the middle of a tribute to Jimi Hendrix… I found it interesting not only because of Balakrishnan’s four-part suite — with its compatible mix of influences — but for putting into the string-quartet format some long-ago popular music I was unfamiliar with…If you love the string-quartet sound and its capabilities, you will likely find something to enjoy in ‘Have You Ever Been…?’ And the Turtle Island Quartet is an excellent group, well-honed under Balakrishnan’s leadership since 1985. I thoroughly enjoyed the wizardly guest appearance of vibraphonist Stefon Harris in “Gypsy Eyes,” the most jazz-inflected tune in the set.