16 bit 44k wav file question in final export

so an artist I'm working with is done shooting, and done editing their first official music video, I'm the one who mixed and mastered the audio. We do everything at 48 24bit, and before sending the song out to be released it's converted to 16 bit 44k, thats the file they are using in the fcpx project and the projects audio sample rate is set to 44k. After watching a couple videos and seeing If I should get compressor for fcpx or not, I started to notice the audio properties on the export, and after doing a little research realized that fcpx doesn't give you the option of exporting at 16 bit but will take your 16-bit and make it into 24 bit is this correct? do you think the up bit sampling will cause any problems? I know converting from 24-bit 48k to 16-bit 44k in the audio world can really mess with audio if not done properly and it has taken me years finally to settle upon my latest method which converts 24-bit 48k to 16 bit 44k flawlessly. But going from 16 to 24 bit or upsampling or up bit usually doesn't do anything, its usually when converting down. So I wouldn't think that going from 16-bit to 24-bit would cause any type of hick up, but maybe I'm wrong? Clearly in the future we'll be using 48k 24-bit file in fcpx as now I know, but for this one we're just going to leave it as is and I'm wondering if the audio being at 16-bit and then exported at 24-bit will cause any problems? since its a music video, making sure the audio sounds identical to how it sounds on the version that was released is important and I'm just trying to prevent anything that could effect it

Also under DATA RATE, what do you guys suggest using for 44k, 16-bit(I know there's no option to choose the bit but what I mean is if the audio file we're using is at 16bit)

and also

48k, 24-bit wav. for future projects

sorry if my thread is confusing, I honestly have a feeling that apple using the bit depth of the audio will have no effect on the sound or quality but just being over precautions, but maybe I'm wrong.

thanks for any help

do you think the up bit sampling will cause any problems?

no 16bit to 24bit won't cause any problems. in most situations 24bit to 16bit if done right won't be discernible as well.

main problem is converting between sample rates. If you really need to do it, do it only once and on a software that is designed to do that. izotope has good algorithms for that.

but still, if you can avoid, avoid it.

By default video standard audio is 16-bit 48kHz.

CD and digital audio downloads for music is standard 16-bit 44.1kHz.

Converting from 24/38 to 16/44.1 will not degrade the audio to any realistically noticeable degree, I've been working with audio my entire life.

When you get an audio file for a music video, request it be 16/48 so that you're working in standard video norms.

Data rate only applies to compressed audio. AIFF is uncompressed, WAV can be uncompressed. Other audio formats are compressed and have a data rate variable, such as MP3.

whats up FCPX guru!

thank you so much for the insight and making my first post so welcoming!

whenever I'd dither no matter which way I went about whether in daw export (tried with each and every setting) or when using the limiter at the end of my mastering chain I would lose .2 lufs loudness, the average person might not notice but I knew right away that my final product when converted using dither would take a small hit, but then I stumbled across converting in iTunes, I no longer dither but just export 48k 24- bit and then convert wav in iTunes to 44k 16-bit and in the analyzer they're identical(also no distortion whatsoever) as opposed to when dithering there's always a .2lufs hit, so out of an abundance of caution I'm just always making sure whenever audio is being converted were not taking a hit

so FCPX doesn't automatically export video/audio at 24-bit? I know your saying ask for 48k 16-bit, as the person I'd be asking would be me, I just have my iTunes convert set to 44k 16-bit as I mostly deal with audio and take my 24-bit 48k down to that for release, and the 16-bit 44k is identical and would constantly switching for audio release and FCPX would be less than ideal(so I would like to either use the 44k 16-bit or 48k 24-bit). And when starting projects in FCPx I start them with audio setting at 44k, so would leaving it at those specs be ok and not mess with the file during or at the end with the final export?

and since its not a compressed file at 16-bit 44k I should just leave DATA RATE alone? as I think it defaults to a setting or is there a way to turn it off?

sorry about the amatuernes of these questions as I'm not right by the FCPX project and export and just going off memory so if something about DATA RATE is wrong forgiver me

Sup PureData!

thanks for the reply and for the reassurance on the up bit!