======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '179'
                                          'artist'  'Mae Glover And John Bird'
                                     'text_people'  ''
                                         'release'  'Sissy Man Blues (1927-1936)'
                                           'title'  'Gas Man Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '140.335'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Sissy Man Blues (1927-1936)'
'TBPM' (BPM (beats per minute))                     '140.335'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Gas Man Blues'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mae Glover And John Bird'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '14'
'TSSE' (Software/Hardware and settings used for encoding)  'Lame3.92'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.08 dB'
'TXXX:replaygain_track_peak'                        '0.566127'

========================== row from database ==========================
                                              'id'  677537
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/v.a. - sissy man blues ( 1927-1936 )/17 - Mae Glover And John Bird - Gas Man Blues.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  179
                                           'genre'  prerock-jb-blues
                                        'filesize'  4406477
                                           'mtime'  1620402845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country v.a. sissy man blues 17 prerock jb blues
                                      'tag_artist'  Mae Glover And John Bird
                                     'tag_release'  Sissy Man Blues (1927-1936)
                                       'tag_title'  Gas Man Blues
                                             'bpm'  140.335
                                    'search_title'  'blues':3 'gas':1 'man':2
                                   'search_artist'  'and':3 'bird':5 'glover':2 'john':4 'mae':1
                                  'search_release'  '1927':4 '19271936':6 '1936':5 'blues':3 'man':2 'sissy':1
                                     'search_rest'  'a':6 'blues':10 'country':4 'exotica':2 'jazz':1 'jb':12 'man':9 'oldies':3 'prerock':11 'sissy':8 'v':5 'va':7
                                    'search_combo'  '1927':12C '19271936':14C '1936':13C 'a':20 'and':6B 'bird':8B 'blues':3A,11C,24 'country':18 'exotica':16 'gas':1A 'glover':5B 'jazz':15 'jb':26 'john':7B 'mae':4B 'man':2A,10C,23 'oldies':17 'prerock':25 'sissy':9C,22 'v':19 'va':21
                                    'tag_tracknum'  14
                                      'num_images'  1
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402845.0177886  (2021-05-07 17:54:05)
                             'size'  4406477