Regarding sonund recording: i've never been able to record any sound!
With an older Nightly build version, i read a tutorial where set sound off were recommended -maybe to optimize recording mb/s rates while recording, or something... and now, that i use the last Nightly Build available, maybe i have to re-read all info available, and practice more settings combos... but, for instance: yesterday i made some recordings, in MLV, 2240x1120px, and using MLVFS i see one of them says 'sound: YES' but it's not true...
I started using RAW video about 6 months ago, using raw_rec.mo (Magic Lantern Nightly.2016Jul09.7D203), and using the CF card i mentioned (Sandisk extreme pro 160MB/S UDMA7 32Gb) i realised i can record about 20 seconds MAX, without sound, in maximun resolution aparently available (about 1120 pix vertical res. max), and 23,9xx fps.
I installed Magic Lantern Nightly.2017Feb12.7D203 a few days ago, and started trying different video settings, with raw_rec and mlv_rec, mlv_lite... I realised i can record continous raw video in normal -no-croppped- mode, but in cropped mode, y can record about 20 seconds maximun at -theoretically- maximun resolution (2240x1120), but allways without sound, even when i can see 'sound:yes' in MLVFS. :/
It's being VERY interesting this 'new world', my 'old' 7D has a new life, and it's being very useful for me taking wildlife scenes as i do
Sorry about my english, and sorry if i'm not clear enough explaining all the facts
Thanks for your answer, @Walter.
Regarding 'bit depth', i have rad something about 10-12-14bits raw video, but i cant see 'where' these settings are in ML :/