German Emagic support told me: > A) Will ESB work with the HD extension? Yes it does. > B) Will it be limited to 44.1/48k? I didn't ask this because I'm personally not interested in 96k or higher. > C) will it be compatible with the new 48 bit TDM mixer? Yes it will. Besides this, here's another good news for Mix-users: since Logic 5.1.3 the TDM Dithered Mixer 24 BIT 5.1.1 is working with Logic! :-) Stefan Gretscher