Memory and disc space

Certainly is something to keep an eye on. If you want to put 1/2 an hour of CD quality audio on your CD rom to accompany the 350 full screen high resolution pictures you've digitised then you may have to think again!

Heres a table to illustrate mono sound files and how much disc/ memory space they use.

This applies whatever file formats you end up using unless there is compression involved.

If you're using Quick Time 2 check out the ima 4:1 audio compression it sounds wicked! (I tried to put a link for more info on this but I can't find any at Apple. Sorry!)

But what sounds best?

Basically it depends on how good your source material is. Not much of an answer I know but its true. Music can sound fine at 8bit 22050k. (roughly comparable to a cheap/bad cassette deck recording)
It can also sound fine at 11025k though you do have to be more carefull to get good sound.
You definitely need to experiment.

By the way if you record at 44.1khz then downsampling to 22050khz or 11025khz is mathematically simpler and seems to sound better.