======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Russ Morgan And His Orchestra'
                                     'text_people'  ''
                                         'release'  'country and western songbook'
                                           'title'  'Careless Kisses'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swing', 'jazz', 'american', 'all', 'big band']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '61'
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '145.790'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'country and western songbook'
'TBPM' (BPM (beats per minute))                     '145.790'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'Careless Kisses'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Russ Morgan And His Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '61'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['swing', 'jazz', 'american', 'all', 'big band']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+12.16 dB'
'TXXX:replaygain_track_peak'                        '0.161337'

========================== row from database ==========================
                                              'id'  474147
                                            'path'  /data/Music/Bulk/00localcharacter/america - country and western songbook - second - 0716/61 - Russ Morgan And His Orchestra - Careless Kisses.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  loc-unsorted
                                        'filesize'  3229236
                                           'mtime'  1621700239
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter america second 0716 61 loc unsorted
                                      'tag_artist'  Russ Morgan And His Orchestra
                                     'tag_release'  country and western songbook
                                       'tag_title'  Careless Kisses
                                             'bpm'  145.79
                                    'search_title'  'careless':1 'kisses':2
                                   'search_artist'  'and':3 'his':4 'morgan':2 'orchestra':5 'russ':1
                                  'search_release'  'and':2 'country':1 'songbook':4 'western':3
                                     'search_rest'  '0716':3 '61':4 'america':1 'loc':5 'second':2 'unsorted':6
                                    'search_combo'  '0716':14 '61':15 'america':12 'and':5B,9C 'careless':1A 'country':8C 'his':6B 'kisses':2A 'loc':16 'morgan':4B 'orchestra':7B 'russ':3B 'second':13 'songbook':11C 'unsorted':17 'western':10C
                                    'tag_tracknum'  61
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['swing', 'jazz', 'american', 'all', 'big band']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621700238.712891  (2021-05-22 18:17:18)
                             'size'  3229236