======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '198'
                                          'artist'  "Sousa's Band"
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'On The Mississippi'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', "
 "'q-play-2', 'Q-JZFKS-2', 'Q-OLDST-1', 'q-chart-1', 'q-drums-1', 'q-other-4', "
 "'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['1900s', '1901', 'all', 'big band', '1890s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '144.438'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '144.438'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         'On The Mississippi'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               "Sousa's Band"
'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'                                   ['1900s', '1901', 'all', 'big band', '1890s']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.06 dB'
'TXXX:replaygain_track_peak'                        '0.589556'

========================== row from database ==========================
                                              'id'  1498230
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1913/Sousa_s Band - On The Mississippi (Medley) 12-4-1913.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  198
                                           'genre'  prerock-band
                                        'filesize'  3974962
                                           'mtime'  1621088910
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1913 Sousa_s (Medley) 12 4 1913 prerock band
                                      'tag_artist'  Sousa's Band
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  On The Mississippi
                                             'bpm'  144.438
                                    'search_title'  'mississippi':3 'on':1 'the':2
                                   'search_artist'  'band':4 's':2 'sousa':1 'sousas':3
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1913':6 '4':11 'band':13 'country':4 'exotica':2 'jazz':1 'medley':9,10 'oldies':3 'prerock':12 's':8 'sousa':7
                                    'search_combo'  '00oldiepop':17 '1913':18 '4':23 'album':9C 'band':7B,25 'country':16 'exotica':14 'jazz':13 'medley':21,22 'mississippi':3A 'non':8C 'nonalbum':10C 'oldies':15 'on':1A 'prerock':24 's':5B,20 'sousa':4B,19 'sousas':6B 'the':2A 'tracks':11C,12C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['1900s', '1901', 'all', 'big band', '1890s']
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621088910.2189348  (2021-05-15 16:28:30)
                             'size'  3974962