======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '179'
                                          'artist'  'Al Miller And His Swing Stompers'
                                     'text_people'  ''
                                         'release'  'Sissy Man Blues (1927-1936)'
                                           'title'  "Ain't That A Mess"
                                           '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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '138.702'
                                             'key'  '12B'
                                        '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))                     '138.702'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         "Ain't That A Mess"
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Miller And His Swing Stompers'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '09'
'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:discogstags'                                  'blues'
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.66 dB'
'TXXX:replaygain_track_peak'                        '0.621399'

========================== row from database ==========================
                                              'id'  1515035
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/v.a. - sissy man blues ( 1927-1936 )/09 - Al Miller And His Swing Stompers - Ain_t That A Mess.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  179
                                           'genre'  prerock-jb-blues
                                        'filesize'  4414651
                                           'mtime'  1620402845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country v.a. sissy man blues 09 Ain_t prerock jb blues
                                      'tag_artist'  Al Miller And His Swing Stompers
                                     'tag_release'  Sissy Man Blues (1927-1936)
                                       'tag_title'  Ain't That A Mess
                                             'bpm'  138.702
                                    'search_title'  'a':5 'ain':1 'aint':3 'mess':6 't':2 'that':4
                                   'search_artist'  'al':1 'and':3 'his':4 'miller':2 'stompers':6 'swing':5
                                  'search_release'  '1927':4 '19271936':6 '1936':5 'blues':3 'man':2 'sissy':1
                                     'search_rest'  'a':6 'ain':11 'blues':10 'country':4 'exotica':2 'jazz':1 'jb':14 'man':9 'oldies':3 'prerock':13 'sissy':8 't':12 'v':5 'va':7
                                    'search_combo'  '1927':16C '19271936':18C '1936':17C 'a':5A,24 'ain':1A,29 'aint':3A 'al':7B 'and':9B 'blues':15C,28 'country':22 'exotica':20 'his':10B 'jazz':19 'jb':32 'man':14C,27 'mess':6A 'miller':8B 'oldies':21 'prerock':31 'sissy':13C,26 'stompers':12B 'swing':11B 't':2A,30 'that':4A 'v':23 'va':25
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  12B
                                           '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-2', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1930
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620402844.987282  (2021-05-07 17:54:04)
                             'size'  4414651