======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '238'
                                          'artist'  'Paul Whiteman'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Dance Of The Hours (Ponchielli)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'bandleaders', '20s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '144.748'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '144.748'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Dance Of The Hours (Ponchielli)'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Whiteman'
'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'                                   ['big band', 'jazz', 'bandleaders', '20s', 'swing']
'TXXX:q-bass'                                       '1'
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.550472'

========================== row from database ==========================
                                              'id'  1437526
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/Paul Whiteman - Dance Of The Hours (Poncielli) 19-8-1920.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  238
                                           'genre'  prerock-swing
                                        'filesize'  4779826
                                           'mtime'  1620559394
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 (Poncielli) 19 8 1920 prerock swing
                                      'tag_artist'  Paul Whiteman
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Dance Of The Hours (Ponchielli)
                                             'bpm'  144.748
                                    'search_title'  'dance':1 'hours':4 'of':2 'ponchielli':5,6 'the':3
                                   'search_artist'  'paul':1 'whiteman':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '19':9 '1920':6 '8':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'poncielli':7,8 'prerock':11 'swing':12
                                    'search_combo'  '00oldiepop':18 '19':22 '1920':19 '8':23 'album':10C 'country':17 'dance':1A 'exotica':15 'hours':4A 'jazz':14 'non':9C 'nonalbum':11C 'of':2A 'oldies':16 'paul':7B 'ponchielli':5A,6A 'poncielli':20,21 'prerock':24 'swing':25 'the':3A 'tracks':12C,13C 'whiteman':8B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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-1', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'bandleaders', '20s', 'swing']
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559393.6636531  (2021-05-09 13:23:13)
                             'size'  4779826