I recently got a DCR-TRV25 and wanted to know if I should be recording my audio in 12 bit or 16 bit? When I received it, it was already on 12. Thanks.

16 bit is DVD standard.

Higher bit-rates will give you more headroom. (I usually work at 24 bit and dither down.)

Thank you very much. Exactly what I needed to know.

+1 on 16bit. 12 bit will kill you post efforts..