FYI - You can not record to a DAT @ 24 bit. Only 16 bit @ 44.1 or 48.0 kHz......
Regarding your other question -> you will get the best resolution when you record at the highest rez rates possible. A recording made at 24 bit/44.1 khz (and then downsampled to 16 bit/44.1 for playback) should sound noticeably better than a recording made at 16 bit/44.1 khz. However, you want to make sure that you are using good digital conversion software (or hardware) that does not introduce artifacts when downsampling. Also, make sure that your software/hardware dithers to 16 bit and does not truncate the data when converting to 16 bit.
paul
Regarding your other question -> you will get the best resolution when you record at the highest rez rates possible. A recording made at 24 bit/44.1 khz (and then downsampled to 16 bit/44.1 for playback) should sound noticeably better than a recording made at 16 bit/44.1 khz. However, you want to make sure that you are using good digital conversion software (or hardware) that does not introduce artifacts when downsampling. Also, make sure that your software/hardware dithers to 16 bit and does not truncate the data when converting to 16 bit.
paul