======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '116'
                                          'artist'  'The Everly Brothers'
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 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '23'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '128'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '23 Greatest Hits'
'TBPM' (BPM (beats per minute))                     '128'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Problems'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Everly Brothers'
'TPE2' (Band/orchestra/accompaniment)               'The Everly Brothers'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/23'
'TSO2'                                              'Everly Brothers, The'
'TSOP' (Performer sort order)                       'Everly Brothers, The'
'TXXX:Artists'                                      'The Everly Brothers'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '091ec508-877f-4e3c-92a3-10903bbbc7ad'
'TXXX:MusicBrainz Release Group Id'                 'd8fa91c2-f6ec-3161-a5d4-662b9913de9a'
'TXXX:MusicBrainz Release Track Id'                 '72480ef4-6074-3ab0-b6a8-feef0b80b3bb'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.14 dB'
'TXXX:replaygain_track_peak'                        '0.619689'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'e9ecf18e-148c-4b56-abf3-4b7086402df7')

========================== row from database ==========================
                                              'id'  1304716
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Everly Brothers/23 Greatest Hits/The Everly Brothers - Problems.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  116
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  1952108
                                           'mtime'  1622659500
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic rock pop early rocknroll
                                      'tag_artist'  The Everly Brothers
                                     'tag_release'  23 Greatest Hits
                                       'tag_title'  Problems
                                             'bpm'  128.0
                                    'search_title'  'problems':1
                                   'search_artist'  'brothers':3 'everly':2 'the':1
                                  'search_release'  '23':1 'greatest':2 'hits':3
                                     'search_rest'  '00poprockelectronic':1 'early':4 'pop':3 'rock':2 'rocknroll':5
                                    'search_combo'  '00poprockelectronic':8 '23':5C 'brothers':4B 'early':11 'everly':3B 'greatest':6C 'hits':7C 'pop':10 'problems':1A 'rock':9 'rocknroll':12 'the':2B
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659499.989458  (2021-06-02 20:44:59)
                             'size'  1952108