======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '177'
                                          'artist'  'Al Bowlly'
                                     'text_people'  ''
                                         'release'  'HMV BD- 892'
                                           'title'  'Only Forever (+ Jimmy Mesene)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-vocal;prerock-jb-jazz-vocal'
                                             'bpm'  '134.735'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV BD- 892'
'TBPM' (BPM (beats per minute))                     '134.735'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-vocal', 'prerock-jb-jazz-vocal']
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         'Only Forever (+ Jimmy Mesene)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Bowlly'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+1.22 dB'
'TXXX:replaygain_track_peak'                        '0.665966'

========================== row from database ==========================
                                              'id'  1426728
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Al Bowlly - Only Forever (+ Jimmy Mesene) 6-12-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  177
                                           'genre'  prerock-vocal;prerock-jb-jazz-vocal
                                        'filesize'  3545174
                                           'mtime'  1620527050
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 6 12 1940 prerock vocal;prerock jb jazz vocal
                                      'tag_artist'  Al Bowlly
                                     'tag_release'  HMV BD- 892
                                       'tag_title'  Only Forever (+ Jimmy Mesene)
                                             'bpm'  134.735
                                    'search_title'  'forever':2 'jimmy':3 'mesene':4,5 'only':1
                                   'search_artist'  'al':1 'bowlly':2
                                  'search_release'  '892':4 'bd':2,3 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1940':6 '6':7 'country':4 'exotica':2 'jazz':1 'jb':13 'oldies':3 'prerock':8,10,12 'vocal':9,11,14
                                    'search_combo'  '00oldiepop':16 '1940':17 '6':18 '892':11C 'al':6B 'bd':9C,10C 'bowlly':7B 'country':15 'exotica':13 'forever':2A 'hmv':8C 'jazz':12 'jb':24 'jimmy':3A 'mesene':4A,5A 'oldies':14 'only':1A 'prerock':19,21,23 'vocal':20,22,25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527050.262759  (2021-05-09 04:24:10)
                             'size'  3545174