md5 checksum

hi

here some questions about the md5 checksum:

- what happens when the md5 checksum of the decoded audio is different
of the internally stored checksum due to file corruption ? Will
playing/decoding still be possible (with some error frames) or will
playing /decoding be not possible at all (so all audio data is lost)?

- what happens when the metadata blocks get corrupt? will the audio
part still be decodable even when non-audio blocks are corrupt?

- since there is only a md5 checksum on the audio blocks itself, what
happens when some wav metadata gets corrupt and you want to decode
that data? How can the decoder detect it's corrupt or not because
there is no md5 checksum for this data?

thx in advance!
Harry