Music XRay bills itself as a “song to opportunity matching” service. Its digital A+R staff evaluates your tracks and submits the good stuff to industry reps for consideration in licensing and other deals. There’s no annual membership fee, but submission fees vary and can add up quickly unless offset by landing a gig. For those with great music, pro production and tunes that can play on ads or radio, it could be worth the investment. But as with any pay-to-pay opportunity, use an abundance of caution.