======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '529'
                                          'artist'  'Joan Jett, Billy Squire, Lynyr'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'I Wanna Rock'
                                           'quals'  ("['Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '97.459'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '97.459'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'I Wanna Rock'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Joan Jett, Billy Squire, Lynyr'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.11 dB'
'TXXX:replaygain_track_peak'                        '0.771944'

========================== row from database ==========================
                                              'id'  1421167
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Joan Jett, Billy Squire, Lynyr/Joan Jett, Billy Squire, Lynyr__I Wanna Rock.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  529
                                           'genre'  rock-unsorted
                                        'filesize'  8489935
                                           'mtime'  1620386437
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Lynyr__I rock unsorted
                                      'tag_artist'  Joan Jett, Billy Squire, Lynyr
                                     'tag_release'  None
                                       'tag_title'  I Wanna Rock
                                             'bpm'  97.459
                                    'search_title'  'i':1 'rock':3 'wanna':2
                                   'search_artist'  'billy':4 'jett':2,3 'joan':1 'lynyr':7 'squire':5,6
                                  'search_release'  
                                     'search_rest'  'classicprogpsy':1 'i':3 'lynyr':2 'rock':4 'unsorted':5
                                    'search_combo'  'billy':7B 'classicprogpsy':11 'i':1A,13 'jett':5B,6B 'joan':4B 'lynyr':10B,12 'rock':3A,14 'squire':8B,9B 'unsorted':15 'wanna':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620386436.7738056  (2021-05-07 13:20:36)
                             'size'  8489935