======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '164'
                                          'artist'  'Ambrose And His Orchestra Vocal Anne Shelton'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Johnny Zero'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '107.778'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '107.778'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Johnny Zero'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '164382'
'TPE1' (Lead performer(s)/Soloist(s))               'Ambrose And His Orchestra Vocal Anne Shelton'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                        '-0.10 dB'
'TXXX:replaygain_track_peak'                        '0.662677'

========================== row from database ==========================
                                              'id'  1140902
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ambrose Mayfair Hotel Orchestra, Anne Shelton - Johnny Zero (Decca 78 rpm).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  164
                                           'genre'  prerock-band
                                        'filesize'  2648064
                                           'mtime'  1620559741
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Mayfair Hotel Orchestra, (Decca 78 rpm) prerock band
                                      'tag_artist'  Ambrose And His Orchestra Vocal Anne Shelton
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Johnny Zero
                                             'bpm'  107.778
                                    'search_title'  'johnny':1 'zero':2
                                   'search_artist'  'ambrose':1 'and':2 'anne':6 'his':3 'orchestra':4 'shelton':7 'vocal':5
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '78':14 'band':18 'country':4 'decca':12,13 'exotica':2 'hotel':9 'jazz':1 'mayfair':8 'oldies':3 'orchestra':10,11 'prerock':17 'rpm':15,16
                                    'search_combo'  '00oldiepop':18 '1920s':19 '1930s':20 '20s':10C '30s':12C '78':27 'ambrose':3B 'and':4B,11C 'anne':8B 'band':31 'country':17 'decca':25,26 'exotica':15 'his':5B 'hotel':22 'jazz':14 'johnny':1A 'mayfair':21 'oldies':16 'orchestra':6B,23,24 'popular':13C 'prerock':30 'rpm':28,29 'shelton':9B 'vocal':7B 'zero':2A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', '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'  1620559741.3138378  (2021-05-09 13:29:01)
                             'size'  2648064