======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '147'
                                          'artist'  'Al Jolson'
                                     'text_people'  ''
                                         'release'  'Columbia  3694'
                                           'title'  "I'll Stand Beneath Your Window Tonight"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', '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-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['20s', 'oldies', 'music hall', 'male vocalists', 'jazz', 'vaudeville']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1922'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '114.028'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Columbia  3694'
'TBPM' (BPM (beats per minute))                     '114.028'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1922'
'TIT2' (Title/songname/content description)         "I'll Stand Beneath Your Window Tonight"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Jolson'
'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:lastfmtags'                                   ['20s', 'oldies', 'music hall', 'male vocalists', 'jazz', 'vaudeville']
'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'                        '+1.53 dB'
'TXXX:replaygain_track_peak'                        '0.651130'

========================== row from database ==========================
                                              'id'  1502102
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1922/Al Jolson - I_ll Stand Beneath Your Window Tonight 5-8-1922.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  147
                                           'genre'  prerock-vocal
                                        'filesize'  2959154
                                           'mtime'  1620666374
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1922 I_ll 5 8 1922 prerock vocal
                                      'tag_artist'  Al Jolson
                                     'tag_release'  Columbia  3694
                                       'tag_title'  I'll Stand Beneath Your Window Tonight
                                             'bpm'  114.028
                                    'search_title'  'beneath':5 'i':1 'ill':3 'll':2 'stand':4 'tonight':8 'window':7 'your':6
                                   'search_artist'  'al':1 'jolson':2
                                  'search_release'  '3694':2 'columbia':1
                                     'search_rest'  '00oldiepop':5 '1922':6 '5':9 '8':10 'country':4 'exotica':2 'i':7 'jazz':1 'll':8 'oldies':3 'prerock':11 'vocal':12
                                    'search_combo'  '00oldiepop':17 '1922':18 '3694':12C '5':21 '8':22 'al':9B 'beneath':5A 'columbia':11C 'country':16 'exotica':14 'i':1A,19 'ill':3A 'jazz':13 'jolson':10B 'll':2A,20 'oldies':15 'prerock':23 'stand':4A 'tonight':8A 'vocal':24 'window':7A 'your':6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           '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'  ['20s', 'oldies', 'music hall', 'male vocalists', 'jazz', 'vaudeville']
                                        'tag_date'  1922
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666373.9625716  (2021-05-10 19:06:13)
                             'size'  2959154