I resisted the digital formats for a lot longer than most people and now I see I don't know anything about what format discs are available for high res audio. I read there is such a thing as DVD-A but that the format is dead. I have a few SACDs and I understand this is a niche that seems to be healthy if somewhat small. Are there BluRay and DVD audio discs or is everything on those types of discs audio & also video? I am not into videos and am just looking for good quality audio. I tend to prefer studio to live music for everything but jazz. Any info would be appreciated thank you.