======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '110'
                                          'artist'  'pete seeger'
                                     'text_people'  ''
                                         'release'  'country and western songbook'
                                           'title'  'Casey Jones'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-2', 'Q-LOCALNESS-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['political', 'americana', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '88'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '118.290'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'country and western songbook'
'TBPM' (BPM (beats per minute))                     '118.290'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Casey Jones'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'pete seeger'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '88'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['political', 'americana', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '-0.10 dB'
'TXXX:replaygain_track_peak'                        '0.279047'

========================== row from database ==========================
                                              'id'  473421
                                            'path'  /data/Music/Bulk/00localcharacter/america - country and western songbook - second - 0716/88 - pete seeger - Casey Jones.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  110
                                           'genre'  loc-namerica-country
                                        'filesize'  2651602
                                           'mtime'  1621700250
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter america second 0716 88 loc namerica
                                      'tag_artist'  pete seeger
                                     'tag_release'  country and western songbook
                                       'tag_title'  Casey Jones
                                             'bpm'  118.29
                                    'search_title'  'casey':1 'jones':2
                                   'search_artist'  'pete':1 'seeger':2
                                  'search_release'  'and':2 'country':1 'songbook':4 'western':3
                                     'search_rest'  '0716':3 '88':4 'america':1 'loc':5 'namerica':6 'second':2
                                    'search_combo'  '0716':11 '88':12 'america':9 'and':6C 'casey':1A 'country':5C 'jones':2A 'loc':13 'namerica':14 'pete':3B 'second':10 'seeger':4B 'songbook':8C 'western':7C
                                    'tag_tracknum'  88
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['political', 'americana', 'folk', 'singer songwriter']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621700249.5590196  (2021-05-22 18:17:29)
                             'size'  2651602