The 3.98.1 release is a maintenance release over 3.98.
Changes do not affect audio quality, but operational bug fixes only:
- build system related: some fixes for mp3rtp and abx tools
- encoder padding values were not correct when resampling was involved
- frequency filtering API was broken; in case you want to use your own higher quality filtering method, it is now possible again to disable LAME buildin filters
- ID3 tagging:
--id3v1-only switch did not work anymore, fixed
--tg <genre> improved, now it matches more often one of the ID3v1 genres, even when small spelling errors are involved
--add-id3v2-size <n> is a new switch, it allows to define your own padding of n bytes.