======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '188'
                                          'artist'  'Trixie Smith'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Freight Train Blues (+ Fletcher Henderson's Orchestra)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-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-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', '30s']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1924'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '88.0'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '88.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1924-05'
'TIT2' (Title/songname/content description)         "Freight Train Blues (+ Fletcher Henderson's Orchestra)"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '188000'
'TPE1' (Lead performer(s)/Soloist(s))               'Trixie Smith'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['blues', 'jazz', '30s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.93 dB'
'TXXX:replaygain_track_peak'                        '0.567846'

========================== row from database ==========================
                                              'id'  1459799
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1924/Trixie Smith - Freight Train Blues (+ Fletcher Henderson) -5-1924.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  188
                                           'genre'  prerock-band
                                        'filesize'  3833482
                                           'mtime'  1620559927
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1924 Henderson) 5 1924 prerock band
                                      'tag_artist'  Trixie Smith
                                     'tag_release'  None
                                       'tag_title'  Freight Train Blues (+ Fletcher Henderson's Orchestra)
                                             'bpm'  88.0
                                    'search_title'  'blues':3 'fletcher':4 'freight':1 'henderson':5 'hendersons':7 'orchestra':8,9 's':6 'train':2
                                   'search_artist'  'smith':2 'trixie':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1924':6 '5':9 'band':11 'country':4 'exotica':2 'henderson':7,8 'jazz':1 'oldies':3 'prerock':10
                                    'search_combo'  '00oldiepop':16 '1924':17 '5':20 'band':22 'blues':3A 'country':15 'exotica':13 'fletcher':4A 'freight':1A 'henderson':5A,18,19 'hendersons':7A 'jazz':12 'oldies':14 'orchestra':8A,9A 'prerock':21 's':6A 'smith':11B 'train':2A 'trixie':10B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', '30s']
                                        'tag_date'  1924
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620559927.396632  (2021-05-09 13:32:07)
                             'size'  3833482