Windows with the ASIO driver installed, gives me highest 48kHz multiple as 1.536kHz. This works up to 24-bit with foobar upsampling, HQplayer or other player of choice. On OSX rates up to 1.536kHz are also seen, even without driver but will only work with 16-bit, 24-bit will sound garbled (OSX can't go this high); 16-bit works fine too though.
Oh, Windows configuration might not see this as a Device possible rate even with the driver installed. You need to push it to the holo spring manually. In foobar2000 you need to set 1408000 (44k) or 1536000 (48k) for example. ASIO or WASAPI is probably required since DirectSound will refuse to play.