======================== unified (from filesystem) ========================
                                         'bitrate'  '191.991'
                                        'duration'  '573'
                                          'artist'  'Britney Spears'
                                     'text_people'  ''
                                         'release'  'Greatest Hits: My Prerogative'
                                           'title'  'Toxic (Armand van Helden remix)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'sexy', 'female vocalists', 'pop']"
                                     'discogstags'  "['electronic', 'hip hop', 'pop', 'rnb/swing', 'house', 'ballad']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  '27'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '132.444'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'Greatest Hits: My Prerogative'
'TBPM' (BPM (beats per minute))                     '132.444'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '2004-11-08'
'TIT2' (Title/songname/content description)         'Toxic (Armand van Helden remix)'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Britney Spears'
'TPE2' (Band/orchestra/accompaniment)               'Britney Spears'
'TPUB' (Publisher)                                  'Jive Records'
'TRCK' (Track number/Position in set)               '21/27'
'TSOP' (Performer sort order)                       'Spears, Britney'
'TSRC' (ISRC (international standard recording code))  'USJI10400036'
'TXXX:ALBUMARTISTSORT'                              'Spears, Britney'
'TXXX:ASIN'                                         'B00065DWD6'
'TXXX:BARCODE'                                      '828766526028'
'TXXX:CATALOGNUMBER'                                '82876 652602'
'TXXX:MusicBrainz Album Artist Id'                  '45a663b5-b1cb-4a91-bff6-2bef7bbfdd76'
'TXXX:MusicBrainz Album Id'                         '725d52c1-057e-4f13-a73f-94c79fa95232'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '45a663b5-b1cb-4a91-bff6-2bef7bbfdd76'
'TXXX:MusicIP PUID'                                 'c931cf8b-d797-26a6-829b-08eed798bd42'
'TXXX:MusicMagic Data'                              'AgEAG1p2mMWcOY6egFIgkjhW51KBfYiWrGGSJFoS01vzo4ABgvOpLMsOFo8JnL/xhbSAAeU/gALlbQXvgAHlJtdCGpGc78MggNaAAaAPloG2uYJ3BPI0wqZpgpCHHcn0lPVL8Lor9LSZaoItzJe1qsV54e2/GoOUgAH0BZLy/c711YMg2orr6QNUrSnWl44cgzo='
'TXXX:MusicMagic Fingerprint'                       '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'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:added_timestamp'                              '128930990202923527'
'TXXX:discogstags'                                  ['electronic', 'hip hop', 'pop', 'rnb/swing', 'house', 'ballad']
'TXXX:lastfmtags'                                   ['dance', 'sexy', 'female vocalists', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.36 dB'
'TXXX:replaygain_track_peak'                        '0.546410'

========================== row from database ==========================
                                              'id'  1310554
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/14 - Britney Spears - Toxic (Armand van helden remix).mp3
                                         'working'  None
                                         'bitrate'  191
                                    'duration_sec'  573
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  13777065
                                           'mtime'  1621696737
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 14 helden electronic generic or radio unsorted
                                      'tag_artist'  Britney Spears
                                     'tag_release'  Greatest Hits: My Prerogative
                                       'tag_title'  Toxic (Armand van Helden remix)
                                             'bpm'  132.444
                                    'search_title'  'armand':2,3 'helden':5 'remix':6,7 'toxic':1 'van':4
                                   'search_artist'  'britney':1 'spears':2
                                  'search_release'  'greatest':1 'hits':2,3 'my':4 'prerogative':5
                                     'search_rest'  '00poprockelectronic':1 'electronic':8 'files':5,6 'generic':9 'helden':7 'loose':3,4 'or':10 'radio':11 'unsorted':2
                                    'search_combo'  '00poprockelectronic':15 'armand':2A,3A 'britney':8B 'electronic':22 'files':19,20 'generic':23 'greatest':10C 'helden':5A,21 'hits':11C,12C 'loose':17,18 'my':13C 'or':24 'prerogative':14C 'radio':25 'remix':6A,7A 'spears':9B 'toxic':1A 'unsorted':16 'van':4A
                                    'tag_tracknum'  21
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'sexy', 'female vocalists', 'pop']
                                        'tag_date'  2004
                                     'discogstags'  ['electronic', 'hip hop', 'pop', 'rnb/swing', 'house', 'ballad']

============================== file details ==============================
                                           'mtime'  1621696737.07151  (2021-05-22 17:18:57)
                             'size'  13777065