======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '152'
                                          'artist'  'Johnny Cash & The Tennessee Two'
                                     'text_people'  ''
                                         'release'  'Solid Gold'
                                           'title'  'Big River'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', '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'  "['country', 'johnny cash', 'usa', 'folk', 'rockabilly']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '92.772'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '58-122b POS 14 B-Side'
'COMM:ID3v1 Comment:XXX'                            '58-122b POS 14 B-Side'
'TALB' (Album/Movie/Show title)                     'Solid Gold'
'TBPM' (BPM (beats per minute))                     '92.772'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'Big River'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash & The Tennessee Two'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'johnny cash', 'usa', 'folk', 'rockabilly']
'TXXX:q-bass'                                       '1'
'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'                        '+1.36 dB'
'TXXX:replaygain_track_peak'                        '0.584741'

========================== row from database ==========================
                                              'id'  1440613
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1958/58-122b - Johnny Cash & The Tennessee Two - Big River.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  152
                                           'genre'  prerock-country
                                        'filesize'  6107008
                                           'mtime'  1621627910
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1958 58 122b prerock country
                                      'tag_artist'  Johnny Cash & The Tennessee Two
                                     'tag_release'  Solid Gold
                                       'tag_title'  Big River
                                             'bpm'  92.772
                                    'search_title'  'big':1 'river':2
                                   'search_artist'  'cash':2 'johnny':1 'tennessee':4 'the':3 'two':5
                                  'search_release'  'gold':2 'solid':1
                                     'search_rest'  '00oldiepop':5 '122b':8 '1958':6 '58':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':14 '122b':17 '1958':15 '58':16 'big':1A 'cash':4B 'country':13 'exotica':11 'gold':9C 'jazz':10 'johnny':3B 'oldies':12 'prerock':18 'river':2A 'solid':8C 'tennessee':6B 'the':5B 'two':7B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', '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-1', 'q-grit-1']
                                      'lastfmtags'  ['country', 'johnny cash', 'usa', 'folk', 'rockabilly']
                                        'tag_date'  1958
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627910.3122747  (2021-05-21 22:11:50)
                             'size'  6107008