OK. I have hundreds of audio CDs, most of which consist of three or four discs. These discs represent one show.
I want to import all of them as FLACs. I want JRiver to understand that there are 3 or more discs, and want it to number the tracks accordingly (often 1-20+ tracks).
It can do all of this.
There are built-in [Track #] and [Disc #] fields, of course. If the files are properly tagged (this information has been embedded in the FLAC files by the application that created them, or by an application that can modify the tags in the files like MC can) this will happen automatically when the files are imported. This assumes the files are already ripped from disc and you're importing them from another application. If you're ripping inside MC, then just make sure the information is right there before you rip them, as Jim suggested.
If the files are incorrectly tagged, but contain tags, then MC will import them with whatever the tags say. But, you can overwite these with whatever information you want. Either manually or...
If the files contain no tags at all (as might happen if you intentionally disabled tagging in your other application, or used an application to manage them that doesn't do tagging on FLAC files), MC will import them with no information at all. This would be odd, because whatever application you used to create the FLAC files could certainly have added tags at that time, so there should be at least something in there from when they were first ripped. Unless you intentionally removed them...?
But, in any case, if you have files that have a good filename/folder structure that contains the information you need, you can use the
Fill Properties from Filename tool to quickly fix the offending files and import the metadata "trapped" in the filenames in a very flexible manner. Please refer to this thread for further detail, and ask if you have questions:
http://yabb.jriver.com/interact/index.php?topic=78206.msg531763#msg531763