I put a video on to compressor, and applied the MP4 setting to it. When I go to the audio tab, there is an option to choose the quality of the audio, which I always choose 'BEST' for.
However, there is also a 'bit rate' tab, which is 64kbps by default. Surely the 'Quality' and 'bit rate' are the same? Or is the bit rate option just there for more precise adjustments? If so, would my 'BEST' quality setting mean a higher bit rate than 64kbps?
It's easy to make stereo mp3's with a bit rate of 196 kbps, so perhaps "best" is better than 64 kbps. Or you might be able to goose up the bit rate setting to something more than 64k.
This sounds like a "This isn't critical, but I'm curious" kind of question, and I'm sorry I don't have a better response. Considering that audio has always been a tiny portion of a clip's file size, I don't suppose it matters all that much in the grand scheme of things.
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA