======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '421'
                                          'artist'  'Thrice'
                                     'text_people'  ''
                                         'release'  'First Impressions'
                                           'title'  'Better Days'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['emo', 'punk', 'post hardcore', 'rock', 'alternative', 'hardcore']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '7'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'rock-gr-punk-emo'
                                             'bpm'  '117.262'
                                             'key'  '10A'
                                        'acoustid'  '24ce652f-28cc-4383-a420-58073ddba525'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '117.262'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk-emo'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Better Days'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Thrice'
'TPE2' (Band/orchestra/accompaniment)               'Thrice'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '7/7'
'TSO2'                                              'Thrice'
'TSOP' (Performer sort order)                       'Thrice'
'TXXX:Acoustid Id'                                  '24ce652f-28cc-4383-a420-58073ddba525'
'TXXX:MusicBrainz Album Artist Id'                  '244afcb7-fa9a-49b1-9aa6-0149512d1c52'
'TXXX:MusicBrainz Album Id'                         '6595d8fd-939b-4794-bbce-816feeefd59d'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'ep'
'TXXX:MusicBrainz Artist Id'                        '244afcb7-fa9a-49b1-9aa6-0149512d1c52'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['emo', 'punk', 'post hardcore', 'rock', 'alternative', 'hardcore']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.32 dB'
'TXXX:replaygain_track_peak'                        '0.849458'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'9e0c1751-c716-43e6-832e-d0b24329f6ea')

========================== row from database ==========================
                                              'id'  1316973
                                            'path'  /data/Music/Bulk/00poprockelectronic/Thrice/First impression/thrice -07- Better Days (1).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  421
                                           'genre'  rock-gr-punk-emo
                                        'filesize'  6748337
                                           'mtime'  1636400202
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic impression thrice 07 (1) rock gr punk emo
                                      'tag_artist'  Thrice
                                     'tag_release'  First Impressions
                                       'tag_title'  Better Days
                                             'bpm'  117.262
                                    'search_title'  'better':1 'days':2
                                   'search_artist'  'thrice':1
                                  'search_release'  'first':1 'impressions':2
                                     'search_rest'  '00poprockelectronic':1 '1':4,5 'emo':9 'gr':7 'impression':2 'punk':8 'rock':6 'thrice':3
                                    'search_combo'  '00poprockelectronic':6 '1':9,10 'better':1A 'days':2A 'emo':14 'first':4C 'gr':12 'impression':7 'impressions':5C 'punk':13 'rock':11 'thrice':3B,8
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['emo', 'punk', 'post hardcore', 'rock', 'alternative', 'hardcore']
                                        'tag_date'  1999
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636400202.1462533  (2021-11-08 20:36:42)
                             'size'  6748337