In a place where music means so much—and where so much of it has been recorded—what visitor or resident hasn't entertained the idea of building an essential New Orleans record library? Given the enormity of the city's recorded output and stylistic scope, the prospect may be daunting. The immediate urge to have everything must be tempered; so instead we offer the following sensible list. Since many treasures of New Orleans music falls in and out of commercial availability, the list is restrict...