======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '155'
                                          'artist'  'Al Bowlly & Lew Stone band'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  "You Couldn't Be Cuter (Kerns/Fields) 12-8-1938"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '145.895'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TCOP' (Copyright message)                          'Public Domain. (Copyright Free)'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         "You Couldn't Be Cuter (Kerns/Fields) 12-8-1938"
'TKEY' (Initial key)                                '9B'
'TLEN' (Length)                                     '155663'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Bowlly & Lew Stone band'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.35 dB'
'TXXX:replaygain_track_peak'                        '0.708640'

========================== row from database ==========================
                                              'id'  1505903
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Lew Stone Duriam Dance Band, Al Bowlly - You couldn_t be Cuter (1938).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  155
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2514524
                                           'mtime'  1620524655
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Duriam Dance Band, couldn_t be (1938) prerock jb jazz unsorted
                                      'tag_artist'  Al Bowlly & Lew Stone band
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  You Couldn't Be Cuter (Kerns/Fields) 12-8-1938
                                             'bpm'  145.895
                                    'search_title'  '12':10 '1281938':13 '1938':12 '8':11 'be':5 'couldn':2 'couldnt':4 'cuter':6 'fields':8 'kerns':7 'kernsfields':9 't':3 'you':1
                                   'search_artist'  'al':1 'band':5 'bowlly':2 'lew':3 'stone':4
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1938':13,14 'band':8,9 'be':12 'couldn':10 'country':4 'dance':7 'duriam':6 'exotica':2 'jazz':1 'jb':16 'oldies':3 'prerock':15 't':11 'unsorted':17
                                    'search_combo'  '00oldiepop':27 '12':10A '1281938':13A '1920s':19C '1930s':21C '1938':12A,35,36 '8':11A 'al':14B 'and':20C 'band':18B,30,31 'be':5A,34 'bowlly':15B 'couldn':2A,32 'couldnt':4A 'country':26 'cuter':6A 'dance':29 'duriam':28 'exotica':24 'fields':8A 'jazz':23 'jb':38 'kerns':7A 'kernsfields':9A 'lew':16B 'oldies':25 'popular':22C 'prerock':37 'stone':17B 't':3A,33 'unsorted':39 'you':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524655.1106894  (2021-05-09 03:44:15)
                             'size'  2514524