The Naxos Music Library (and versatile Qobuz) offers a well honed, classical-only streaming experience with plenty of relevant information, and Immerseel on both services, but on the Naxos Music Library only select early Beethoven recordings of Karajan (made for HMV with the Philharmonia Orchestra, now EMI, just sold to Warner as part of the Parlophone auction) are available, and early post-war broadcasts from Berlin (Audite).