Hi,
Just another perspective to throw into the mix here from someone who sits on audition panels on a regular basis that may be of use:
1. Absolutely ask in regard to direct address, some people will indeed like it and some will not be in favour, but feel free to ask. For me personally, as the AD of a training organisation I very much want to be connected to the auditionee and therefore am quite happy for them to address the speech to myself and/or the panel, but some schools will not like that at all. I don't agree with that, but hey each to their own! All will write notes though so don't be put off by that either way!
2. The interview DOES very much matter. We are interviewing you for a number of reasons, that will all determine as to whether we think you are an actor who can be open to training. We will want to see if you are a team player, realistic, connected with the industry and aware of the world in which you are wishing to enter. We will also want to ensure you are open and available as a human being, not closed or arrogant, egotistical or self-centred. Acting is after all about relationships, it is not about you it is about the relationships you form and that requires you to be a good listener, open to others and receptive to redirection and constructive training and feedback- all of these things we get from the interview, and these things may in some cases outweigh your actual audition. As contrary to the opinions expressed above we can train pretty much anyone to be an actor within reason, but an open one, a generous one, and ultimately a successful one is very much dependent on the individual and NOT their ability to do a 2 minute speech. So in regard to the interview, listen be open and be yourself- we want to see who you are and what it is about you that may excite us- don't tell us or try to show us what you think an actor is or what you think we want to hear- honesty will always win the day in every way!
3. Wear clothes that are neutral, and as advised above without any big logos or distractions, although a little personality is always a nice thing, this can be communicated by a style of neutral clothing or perhaps the way you tie your hair, the shoes you wear or socks if your audition is a group setting. Although we have your photo as a reference point, when working in a group the panel will always like to be able to refer to someone by a clear reference point; the one with the 'red socks' for example etc etc. Something that stands you out from the rest, as long as that isn't 'the really loud one who won't let anyone else speak' you'll be fine!
Best of luck and enjoy the process- it should be fun and not like going to the dentist at all!