======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '139'
                                          'artist'  'Mel Tillis'
                                     'text_people'  ''
                                         'release'  '1957-1960 (Warped 5710)'
                                           'title'  'It Takes a Worried Man to Sing a Worried Song'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classic country', 'old country', 'country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '139.9'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1957-1960 (Warped 5710)'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'It Takes a Worried Man to Sing a Worried Song'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Mel Tillis'
'TPE2' (Band/orchestra/accompaniment)               'Mel Tillis'
'TRCK' (Track number/Position in set)               '03'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['classic country', 'old country', 'country']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.22 dB'
'TXXX:replaygain_track_peak'                        '0.501920'

========================== row from database ==========================
                                              'id'  647794
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Warped Records Collection/warped 5710 - Mel Tillis - Classics 1957-1960 (2010)/03 - It Takes A Worried Man To Sing A Worried Song.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  139
                                           'genre'  loc-namerica-country
                                        'filesize'  6415452
                                           'mtime'  1621629024
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Records Collection warped Classics (2010) 03 A To A loc namerica country
                                      'tag_artist'  Mel Tillis
                                     'tag_release'  1957-1960 (Warped 5710)
                                       'tag_title'  It Takes a Worried Man to Sing a Worried Song
                                             'bpm'  139.9
                                    'search_title'  'a':3 'it':1 'man':5 'sing':7 'song':8 'takes':2 'to':6 'worried':4
                                   'search_artist'  'mel':1 'tillis':2
                                  'search_release'  '1957':1 '19571960':3 '1960':2 '5710':6,7 'warped':4,5
                                     'search_rest'  '2010':5,6 'a':7 'classics':4 'collection':2 'country':11 'loc':9 'namerica':10 'records':1 'to':8 'warped':3
                                    'search_combo'  '1957':11C '19571960':13C '1960':12C '2010':22,23 '5710':16C,17C 'a':3A,24 'classics':21 'collection':19 'country':28 'it':1A 'loc':26 'man':5A 'mel':9B 'namerica':27 'records':18 'sing':7A 'song':8A 'takes':2A 'tillis':10B 'to':6A,25 'warped':14C,15C,20 'worried':4A
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'old country', 'country']
                                        'tag_date'  2010
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629023.6417325  (2021-05-21 22:30:23)
                             'size'  6415452