======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '175'
                                          'artist'  'Four Lads'
                                     'text_people'  ''
                                         'release'  'Moments to Remember: Very Best'
                                           'title'  "I Just Don't Know"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['50s', 'pop', 'oldies', 'canadian', 'vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '144'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '123.482'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Moments to Remember: Very Best'
'TBPM' (BPM (beats per minute))                     '123.482'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         "I Just Don't Know"
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Four Lads'
'TRCK' (Track number/Position in set)               '144'
'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'                                   ['50s', 'pop', 'oldies', 'canadian', 'vocal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                        '+0.41 dB'
'TXXX:replaygain_track_peak'                        '0.597843'

========================== row from database ==========================
                                              'id'  1513247
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1957/1957-144 - Four Lads - I Just Don_t Know.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  175
                                           'genre'  prerock-unsorted
                                        'filesize'  7024720
                                           'mtime'  1621698318
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1957 1957 144 Don_t prerock unsorted
                                      'tag_artist'  Four Lads
                                     'tag_release'  Moments to Remember: Very Best
                                       'tag_title'  I Just Don't Know
                                             'bpm'  123.482
                                    'search_title'  'don':3 'dont':5 'i':1 'just':2 'know':6 't':4
                                   'search_artist'  'four':1 'lads':2
                                  'search_release'  'best':6 'moments':1 'remember':3,4 'to':2 'very':5
                                     'search_rest'  '00oldiepop':5 '144':7 '1957':6 'country':4 'don':8 'exotica':2 'jazz':1 'oldies':3 'prerock':10 't':9 'unsorted':11
                                    'search_combo'  '00oldiepop':19 '144':21 '1957':20 'best':14C 'country':18 'don':3A,22 'dont':5A 'exotica':16 'four':7B 'i':1A 'jazz':15 'just':2A 'know':6A 'lads':8B 'moments':9C 'oldies':17 'prerock':24 'remember':11C,12C 't':4A,23 'to':10C 'unsorted':25 'very':13C
                                    'tag_tracknum'  144
                                      'num_images'  0
                                             'key'  7B
                                           '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-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['50s', 'pop', 'oldies', 'canadian', 'vocal']
                                        'tag_date'  1957
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698318.0210326  (2021-05-22 17:45:18)
                             'size'  7024720