======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '206'
                                          'artist'  "Ben Selvin's Knickerbockers"
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  '1 must have that man'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', '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-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz age', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1928'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '84.455'
                                             'key'  '8A'
                                        '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))                     '84.455'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1928'
'TIT2' (Title/songname/content description)         '1 must have that man'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               "Ben Selvin's Knickerbockers"
'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:lastfmtags'                                   ['jazz age', 'swing']
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.41 dB'
'TXXX:replaygain_track_peak'                        '0.333370'

========================== row from database ==========================
                                              'id'  1511483
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers - I Must Have That Man! 1928.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  206
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3325957
                                           'mtime'  1620524271
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Selvin_s I Must Have That Man! 1928 prerock jb jazz unsorted
                                      'tag_artist'  Ben Selvin's Knickerbockers
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  1 must have that man
                                             'bpm'  84.455
                                    'search_title'  '1':1 'have':3 'man':5 'must':2 'that':4
                                   'search_artist'  'ben':1 'knickerbockers':5 's':3 'selvin':2 'selvins':4
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1928':13 'country':4 'exotica':2 'have':10 'i':8 'jazz':1 'jb':15 'man':12 'must':9 'oldies':3 'prerock':14 's':7 'selvin':6 'that':11 'unsorted':16
                                    'search_combo'  '00oldiepop':19 '1':1A '1920s':11C '1928':27 '1930s':13C 'and':12C 'ben':6B 'country':18 'exotica':16 'have':3A,24 'i':22 'jazz':15 'jb':29 'knickerbockers':10B 'man':5A,26 'must':2A,23 'oldies':17 'popular':14C 'prerock':28 's':8B,21 'selvin':7B,20 'selvins':9B 'that':4A,25 'unsorted':30
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           '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-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz age', 'swing']
                                        'tag_date'  1928
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524271.471853  (2021-05-09 03:37:51)
                             'size'  3325957