======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '186'
                                          'artist'  'Artie Shaw'
                                     'text_people'  'W.C. Handy'
                                         'release'  '20s and 30s popular'
                                           'title'  "Chantez Les Bas (Sing 'Em Low)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'clarinet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '98.120'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '98.120'
'TCOM' (Composer)                                   'W.C. Handy'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         "Chantez Les Bas (Sing 'Em Low)"
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '187013'
'TPE1' (Lead performer(s)/Soloist(s))               'Artie Shaw'
'TPE2' (Band/orchestra/accompaniment)               'Artie Shaw'
'TPUB' (Publisher)                                  'History'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.45 dB'
'TXXX:replaygain_track_peak'                        '0.369127'

========================== row from database ==========================
                                              'id'  1511660
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Artie Shaw - Chantez Les Bas (Sing _Em Low) 1936.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  186
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  3003521
                                           'mtime'  1620524205
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s _Em 1936 prerock jb jazz soft swing
                                      'tag_artist'  Artie Shaw
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Chantez Les Bas (Sing 'Em Low)
                                             'bpm'  98.12
                                    'search_title'  'bas':3 'chantez':1 'em':6,7 'les':2 'low':8,9 'sing':4,5
                                   'search_artist'  'artie':1 'shaw':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '1936':9 'country':4 'em':8 'exotica':2 'jazz':1 'jb':11 'oldies':3 'prerock':10 'soft':12 'swing':13
                                    'search_combo'  '00oldiepop':20 '1920s':21 '1930s':22 '1936':24 '20s':12C '30s':14C 'and':13C 'artie':10B 'bas':3A 'chantez':1A 'country':19 'em':6A,7A,23 'exotica':17 'jazz':16 'jb':26 'les':2A 'low':8A,9A 'oldies':18 'popular':15C 'prerock':25 'shaw':11B 'sing':4A,5A 'soft':27 'swing':28
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524205.4171696  (2021-05-09 03:36:45)
                             'size'  3003521