======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '187'
                                          'artist'  'Selvin, Ben & His Orchestra'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'Dancing in the Dark'
                                           '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-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-big band'
                                             'bpm'  '84.667'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:\t\x0e\x00\x00'                  PRIV(owner='AverageLevel', data=b'\t\x0e\x00\x00')
'PRIV:PeakValue:²y\x00\x00'                         PRIV(owner='PeakValue', data=b'\xb2y\x00\x00')
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '84.667'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-big band'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Dancing in the Dark'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '187040'
'TPE1' (Lead performer(s)/Soloist(s))               'Selvin, Ben & His Orchestra'
'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'                                       '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'                                     '2'
'TXXX:replaygain_track_gain'                        '+4.22 dB'
'TXXX:replaygain_track_peak'                        '0.399749'

========================== row from database ==========================
                                              'id'  1501708
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers - Dancing in the Dark.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  187
                                           'genre'  prerock-jb-jazz-o-big band
                                        'filesize'  3121524
                                           'mtime'  1620524266
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Selvin_s Knickerbockers prerock jb jazz big band
                                      'tag_artist'  Selvin, Ben & His Orchestra
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  Dancing in the Dark
                                             'bpm'  84.667
                                    'search_title'  'dancing':1 'dark':4 'in':2 'the':3
                                   'search_artist'  'ben':3 'his':4 'orchestra':5 'selvin':1,2
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 'band':12 'big':11 'country':4 'exotica':2 'jazz':1 'jb':10 'knickerbockers':8 'oldies':3 'prerock':9 's':7 'selvin':6
                                    'search_combo'  '00oldiepop':18 '1920s':10C '1930s':12C 'and':11C 'band':25 'ben':7B 'big':24 'country':17 'dancing':1A 'dark':4A 'exotica':15 'his':8B 'in':2A 'jazz':14 'jb':23 'knickerbockers':21 'oldies':16 'orchestra':9B 'popular':13C 'prerock':22 's':20 'selvin':5B,6B,19 'the':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  []
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524266.173324  (2021-05-09 03:37:46)
                             'size'  3121524