======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '135'
                                          'artist'  'Don & Bon'
                                     'text_people'  ''
                                         'release'  'Dynamite R&B Duos - Vol. 03'
                                           'title'  "I'm Lost"
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rhythmblues'
                                             'bpm'  '129.813'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Dynamite R&B Duos - Vol. 03'
'TBPM' (BPM (beats per minute))                     '129.813'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rhythmblues'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         "I'm Lost"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Don & Bon'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '18'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.34 dB'
'TXXX:replaygain_track_peak'                        '0.337396'

========================== row from database ==========================
                                              'id'  1505928
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/va - Dynamite R&B Duos - Vol. 03/18 - Don & Bon - I_m Lost.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  135
                                           'genre'  rock-pop-early-rhythmblues
                                        'filesize'  2172032
                                           'mtime'  1620736494
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country va 18 I_m rock pop early rhythmblues
                                      'tag_artist'  Don & Bon
                                     'tag_release'  Dynamite R&B Duos - Vol. 03
                                       'tag_title'  I'm Lost
                                             'bpm'  129.813
                                    'search_title'  'i':1 'im':3 'lost':4 'm':2
                                   'search_artist'  'bon':2 'don':1
                                  'search_release'  'b':3 'duos':5 'dynamite':1 'r':2 'rb':4 'vol':6,7
                                     'search_rest'  '18':6 'country':4 'early':11 'exotica':2 'i':7 'jazz':1 'm':8 'oldies':3 'pop':10 'rhythmblues':12 'rock':9 'va':5
                                    'search_combo'  '18':19 'b':9C 'bon':6B 'country':17 'don':5B 'duos':11C 'dynamite':7C 'early':24 'exotica':15 'i':1A,20 'im':3A 'jazz':14 'lost':4A 'm':2A,21 'oldies':16 'pop':23 'r':8C 'rb':10C 'rhythmblues':25 'rock':22 'va':18 'vol':12C,13C
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736494.4935472  (2021-05-11 14:34:54)
                             'size'  2172032