for %g in (*.wav) do flac --keep-foreign-metadata "%g"
Foreign metadata is just that. It has no bearing on the audio data. Whether you wish to keep it is up to you. Do you ever plan on converting them back to wave files? If so, what do you plan on doing with them? I'm guessing you'll never miss those LIST chunks. Except for some wave editors and a handful of other applications, they aren't really used. When they are used it usually isn't done in a standard way that makes them compatible between those applications.How are you creating these wave files anyway? If you're using dBpoweramp (which writes this metadata by default), you might as well use it to convert them to flac. If you do it that way I'm pretty sure the metadata will be converted over to proper vorbis comments/flac tags.