1. what tag types to use (and not use) with MP3? (need metadata and RG)
2. what tag types to use (and not use) with FLAC? (need at least add replaygain info, but preferably also metadata)
3. what principles do you consider as 'best practice' regarding album art storage?
Use ID3v2.3 tags. You can enable these in Foobar2000->preferences->Advanced->Tagging->MP3->"Write ID3v2.3 tags (more compatible)."Also enable "Map TPE2 to Album Artist (More compatible).
Use native FLAC tags and use FB2K for tagging. This should automatically ensure compatibility.
You can store any image as album art in the metadata. The exact size of the images to embed in your lossy and lossless files is really up to you.
Is there any point of using ID3v1 tags anymore?
mp3tag stands to write 'vorbis comments' to FLAC files. according to FLAC FAQ, those schould be identical to FLAC tags. Is that safe way to go or sticking with f2k makes any difference?
Well, I would like to store album art outside music folders (and files).
Thanks for answers. Its exactly what I was looking for. Ragarding covers, it seems that my approach leads to complications, so maybe it would be wise to follow cover.jpg standard, and save myself from wasting too much time later. Can you please point me to some good utilities for fetching cover arts?Another question (little bit more practical):How can I delete ID3v1 and APEv2 tags and write ID3v2.3 at the same time, containing previous metadata and replaygain info? It would be nice if I can also apply it to whole mp3 collection Any ideas?
Regarding album art sources. Searchable, hiqh quality art found here:http://www.albumartexchange.com/
Peter Pawlowski (developer of foobar2000) has also made a free software for fetching music coverart from the internet:• AutoFolderPic An automated folder.jpg picture downloader based on Google images search