======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '170'
                                          'artist'  "Arthur Briggs' Savoy Syncopator's Orch"
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "Why Don't You (1927)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '113.010'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '113.010'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         "Why Don't You (1927)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Arthur Briggs' Savoy Syncopator's Orch"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.409871'

========================== row from database ==========================
                                              'id'  1510570
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Arthur Briggs_ Savoy Syncopator_s Orch - Why Don_t You (1927).mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  170
                                           'genre'  prerock-unsorted
                                        'filesize'  2408448
                                           'mtime'  1621697845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Briggs_ Syncopator_s Don_t prerock unsorted
                                      'tag_artist'  Arthur Briggs' Savoy Syncopator's Orch
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Why Don't You (1927)
                                             'bpm'  113.01
                                    'search_title'  '1927':6,7 'don':2 'dont':4 't':3 'why':1 'you':5
                                   'search_artist'  'arthur':1 'briggs':2,3 'orch':8 's':6 'savoy':4 'syncopator':5 'syncopators':7
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'briggs':8 'country':4 'don':11 'exotica':2 'jazz':1 'oldies':3 'prerock':13 's':10 'syncopator':9 't':12 'unsorted':14
                                    'search_combo'  '00oldiepop':24 '1920s':25 '1927':6A,7A '1930s':26 '20s':16C '30s':18C 'and':17C 'arthur':8B 'briggs':9B,10B,27 'country':23 'don':2A,30 'dont':4A 'exotica':21 'jazz':20 'oldies':22 'orch':15B 'popular':19C 'prerock':32 's':13B,29 'savoy':11B 'syncopator':12B,28 'syncopators':14B 't':3A,31 'unsorted':33 'why':1A 'you':5A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697844.886467  (2021-05-22 17:37:24)
                             'size'  2408448