The composer's own recordings are worth seeking out; some of them in rather poor sound which blurs the detail in places not necessarily a bad thing: Strauss commented at the end of his life that younger conductors were getting the "Battle Scene" from Heldenleben too precise - he wanted more of a muddle!
There's also some of the recordings from that 1947 Strauss Festival preserved:
There's also some of the recordings from that 1947 Strauss Festival preserved:
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