======================== unified (from filesystem) ========================
                                         'bitrate'  '210.178'
                                        'duration'  '218'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'Trent Reznor'
                                         'release'  'Ring Of Fire (The Legend Of Johnny Cash)'
                                           'title'  'Hurt'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
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 "'Q-PIANO-2', 'q-chart-4', 'q-drums-1', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '90.331'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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'TALB' (Album/Movie/Show title)                     'Ring Of Fire (The Legend Of Johnny Cash)'
'TBPM' (BPM (beats per minute))                     '90.331'
'TCOM' (Composer)                                   'Trent Reznor'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'Hurt'
'TKEY' (Initial key)                                '9B'
'TLAN' (Language(s))                                'eng'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal'
'TRCK' (Track number/Position in set)               '21'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.90.3 --alt-preset standard'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:Release type'                                 'Normal release'
'TXXX:Rip date'                                     '2006-01-08'
'TXXX:Source'                                       'CD'
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.71 dB'
'TXXX:replaygain_track_peak'                        '0.449158'

========================== row from database ==========================
                                              'id'  1494656
                                            'path'  /data/Music/Bulk/00localcharacter/Johnny Cash - Johnny_Cash-Ring_Of_Fire_(The_Legend_Of_Johnny_Cash)-2005/21-johnny_cash-hurt.mp3
                                         'working'  None
                                         'bitrate'  210
                                    'duration_sec'  218
                                           'genre'  loc-namerica-country
                                        'filesize'  5744595
                                           'mtime'  1621629726
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Johnny_Cash Ring_Of_Fire_(The_Legend_Of_Johnny_Cash) 2005 21 johnny_cash hurt loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Ring Of Fire (The Legend Of Johnny Cash)
                                       'tag_title'  Hurt
                                             'bpm'  90.331
                                    'search_title'  'hurt':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'cash':8,9 'fire':3 'johnny':7 'legend':6 'of':2 'ring':1 'the':4,5
                                     'search_rest'  '2005':19 '21':20 'cash':2,10,18 'country':24 'fire':5,13 'hurt':21 'johnny':1,9,17 'legend':7,15 'loc':22 'namerica':23 'of':4,8,12,16 'ring':3,11 'the':6,14
                                    'search_combo'  '2005':31 '21':32 'cash':3B,11C,12C,14,22,30 'country':36 'fire':6C,17,25 'hurt':1A,33 'johnny':2B,10C,13,21,29 'legend':9C,19,27 'loc':34 'namerica':35 'of':5C,16,20,24,28 'ring':4C,15,23 'the':7C,8C,18,26
                                    'tag_tracknum'  21
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'Q-PLAY-2', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629726.3084667  (2021-05-21 22:42:06)
                             'size'  5744595