======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '175'
                                          'artist'  'Fred Astaire'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "S' Wonderful (+ Oscar Peterson)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '138.040'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '138.040'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1952'
'TIT2' (Title/songname/content description)         "S' Wonderful (+ Oscar Peterson)"
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Fred Astaire'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.23 dB'
'TXXX:replaygain_track_peak'                        '0.665588'

========================== row from database ==========================
                                              'id'  1428159
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1952/Fred Astaire - S wonderful (+ Oscar Peterson) 1952.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  175
                                           'genre'  prerock-swing
                                        'filesize'  3501874
                                           'mtime'  1620562411
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1952 wonderful 1952 prerock swing
                                      'tag_artist'  Fred Astaire
                                     'tag_release'  None
                                       'tag_title'  S' Wonderful (+ Oscar Peterson)
                                             'bpm'  138.04
                                    'search_title'  'oscar':4 'peterson':5,6 's':1,2 'wonderful':3
                                   'search_artist'  'astaire':2 'fred':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1952':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'swing':9 'wonderful':7
                                    'search_combo'  '00oldiepop':13 '1952':14 'astaire':8B 'country':12 'exotica':10 'fred':7B 'jazz':9 'oldies':11 'oscar':4A 'peterson':5A,6A 'prerock':16 's':1A,2A 'swing':17 'wonderful':3A,15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
                                        'tag_date'  1952
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562410.7127843  (2021-05-09 14:13:30)
                             'size'  3501874