Hello,
there is one more thing to be added: when you get ONE 16bit sound in 24bit format, you get some headroom.
But when you record SEVERAL tracks, while mixing (in 24 bit) you'll see that the 8 additional bits of headroom are welcome: the signals have place enough to add to each one with much less risk of clipping. Durin mixing and mastering, you can always take advantage of the additional headroom. Once this step is achieved, you no longer need all that space: I mean then when you're finished with processing and ready to record, you can go back to the ole 16bit CD format.
I hope this clarifies a bit.
Nice evening to all,
Gabriel
madlisper
fantom XR, Roland A-90EX, M-Audio49, ZOOM H4, Audacity, Csound ... and Lisp !!!