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The date stamp of the files after retagging will change to the current date that's for sureDepends on which application you use.
And foobar2000 can as well, but you need to go into the "Advanced" preferences.
Edit: Ouch. Didn't see you were using *n*x.
I just edit the genre field and press the save button. I don't think it changes anything else. It's a very simple software with no side effects.
I think Musicbrainz Picard do some stuff in the background like you mentioned with ID3 tags, but as far as I know it removes them from FLAC during save, not add them.
...I have heard of cases where ID3 tags were added to a FLAC (they are supposed to use Vorbis comments) and then some software couldn't open or play the FLAC. I'm not sure how that was done because good tagging software shouldn't do that.
Audacity can't write a tag without re-writing the whole file so there's a possibility of accidently adding dither or otherwise altering the audio. So, don't use Audacity if all you want to do is add or edit metadata.
If I can put all pop and rock albums under pop/rock I think I covered like 80% of my library. These are the broad genres of allmusic https://www.allmusic.com/genres I was wondering if I can use the same few genres as it saves from a lot of headaches.
Genre is a nightmare.
This. Either follow Porcus' advice and live with what external taggers and artists throw at you, or: develop your very own taxonomy. I have both experimented with hierarchical (10 broad genres à la allmusic [Classical, Pop, Rock, ...] + 60-70 fine style tags, most of them just more granular genres [Vocal Pop, Hard Rock, Opera] but also special notifiers [Instrumental, Orchestral, Vocal] that span genres) and broad taxonomies. The hierarchical model was reasonable to maintain, as I only hand-sanitized the 10 broad categories, whereas the style taxonomy could grow a little untidy at times. All in all the cost-benefit ratio of maintaining such a tree did not cut it.
My current iteration on the genre tag aims to allow for directory browsing and consists of over 60 handcrafted genres that fit my library, so that each folder has <100 albums in each. I manually clustered similar albums and only then determined the label. Finally I tagged all files according to those clusters.
To give you an idea what those labels look for me (containing between 2 and 60 albums each):
With that, the file name pattern
|Acid Jazz||Dubstep||Indie Rock||Progressive Rock|
|Alternative Rock||Easy Listening||Industrial||Punk|
|Ambient||Electro Acoustic||Instrumental Hip Hop||Rap|
|Big Beat||Euro House||Instrumental Rock||Reggae|
|Classic Rock||Garage Rock||Mix||Symphonic Metal|
|Dance||Hard Rock||Pop||Tech House|
|Darkwave||Hip Hop||Pop Rock||Techno|
|Drum'n Bass||Indie Acoustic||Post Rock||Trip Hop|
|Dub||Indie Pop||Progressive Metal||Vocal Pop|
genre/album artist - album [year]/d.nn. title.extbecomes pretty browsable, even when I have only file system access.
Can the FB2k search for the loudest fragment among all the tracks in the playlist and play this particular fragment? When recording cassettes on a tape recorder, it is very useful to know the maximum recording level for the entire playlist or album in order to adjust the recording level on the tape recorder, which is guaranteed not to be exceeded throughout the entire album. ...
Does the FB2k have this capability (like "peak search" function on Hi-FI CD Players) natively or using plugins?
Just assume jitter eating software to be snake oil.
Audio blogger Archimago does some interesting measurements. Here is one: https://archimago.blogspot.com/2013/03/measurements-hunt-for-load-induced.html
Great stuff. Looks like a lot of good, non-opinion based stuff to go read over there. Thank you.