======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '209'
                                          'artist'  'Anne Shelton-Ambrose & his Orchestra'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Anne Shelton/Ambrose & his Orchestra / Russian Rose'
                                           '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-3', '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'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '145.476'
                                             'key'  '12A'
                                        '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))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Anne Shelton/Ambrose & his Orchestra / Russian Rose'
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '209950'
'TPE1' (Lead performer(s)/Soloist(s))               'Anne Shelton-Ambrose & his Orchestra'
'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'                                       '3'
'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'                        '+1.46 dB'
'TXXX:replaygain_track_peak'                        '0.499026'

========================== row from database ==========================
                                              'id'  1160244
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ambrose Mayfair Hotel Orchestra, Anne Shelton - Russian Rose.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  209
                                           'genre'  prerock-vocal
                                        'filesize'  4298752
                                           'mtime'  1620666344
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Mayfair Hotel Orchestra, prerock vocal
                                      'tag_artist'  Anne Shelton-Ambrose & his Orchestra
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Anne Shelton/Ambrose & his Orchestra / Russian Rose
                                             'bpm'  145.476
                                    'search_title'  'ambrose':3 'anne':1 'his':5 'orchestra':6 'rose':8 'russian':7 'shelton':2 'sheltonambrose':4
                                   'search_artist'  'ambrose':3 'anne':1 'his':5 'orchestra':6 'shelton':2 'sheltonambrose':4
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'hotel':9 'jazz':1 'mayfair':8 'oldies':3 'orchestra':10,11 'prerock':12 'vocal':13
                                    'search_combo'  '00oldiepop':23 '1920s':24 '1930s':25 '20s':15C '30s':17C 'ambrose':3A,11B 'and':16C 'anne':1A,9B 'country':22 'exotica':20 'his':5A,13B 'hotel':27 'jazz':19 'mayfair':26 'oldies':21 'orchestra':6A,14B,28,29 'popular':18C 'prerock':30 'rose':8A 'russian':7A 'shelton':2A,10B 'sheltonambrose':4A,12B 'vocal':31
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  12A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666344.300673  (2021-05-10 19:05:44)
                             'size'  4298752