======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Lovie Austin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'm Three Times Seven"
                                           'quals'  ("['Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'Q-PLAY-2', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'Q-PIANO-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz baby', 'all', 'jazz', 'acoustic blues', 'slightly streamable']"
                                     'discogstags'  "['blues', 'jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1924'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '109.764'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '109.764'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1924'
'TIT2' (Title/songname/content description)         "I'm Three Times Seven"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lovie Austin'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['blues', 'jazz']
'TXXX:lastfmtags'                                   ['jazz baby', 'all', 'jazz', 'acoustic blues', 'slightly streamable']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.04 dB'
'TXXX:replaygain_track_peak'                        '0.668276'

========================== row from database ==========================
                                              'id'  1509996
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1924/Lovie Austin - I_m Three Times Seven 1924.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  prerock-unsorted
                                        'filesize'  3682098
                                           'mtime'  1620385717
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1924 I_m 1924 prerock unsorted
                                      'tag_artist'  Lovie Austin
                                     'tag_release'  None
                                       'tag_title'  I'm Three Times Seven
                                             'bpm'  109.764
                                    'search_title'  'i':1 'im':3 'm':2 'seven':6 'three':4 'times':5
                                   'search_artist'  'austin':2 'lovie':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1924':6 'country':4 'exotica':2 'i':7 'jazz':1 'm':8 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':13 '1924':14 'austin':8B 'country':12 'exotica':10 'i':1A,15 'im':3A 'jazz':9 'lovie':7B 'm':2A,16 'oldies':11 'prerock':17 'seven':6A 'three':4A 'times':5A 'unsorted':18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz baby', 'all', 'jazz', 'acoustic blues', 'slightly streamable']
                                        'tag_date'  1924
                                     'discogstags'  ['blues', 'jazz']

============================== file details ==============================
                                           'mtime'  1620385717.2131371  (2021-05-07 13:08:37)
                             'size'  3682098