Flowers for Casey Benjamin

On saxophone, vocoder or keys, Stutz McGee made things happen

Casey Benjamin, who died last Saturday at 45, was the sort of musician whose impact can’t be assessed by the usual metrics — not awards and accolades, though he racked up a few, nor even a discography, though he leaves behind a heavy track record.

He was the keeper of a sound. Or rather, a small confab of sounds, jangling as if on a keychain. His alto sa…