I see the spec (48,000hz) for HD audio everywhere I look, but I can't
seem to pinpoint the bit rate. Can 16 bit audio with 48,000hz be considered HD audio or does it have to jump up in bit rate(24 or 32)?
Thanks, I looked, but can't find the answer to this.

Also, if I'm using 16 bit audio on an HD timeline in vegas 8 and eventualy want to export as HD, what will the result be?

Thanks again