======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '204'
                                          'artist'  'Elvis Presley'
                                     'text_people'  ''
                                         'release'  'country and western songbook'
                                           'title'  'Gentle On My Mind'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-LOCALNESS-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '122.585'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'country and western songbook'
'TBPM' (BPM (beats per minute))                     '122.585'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Gentle On My Mind'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Elvis Presley'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '17'
'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'                                   ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
'TXXX:q-bass'                                       '4'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.40 dB'
'TXXX:replaygain_track_peak'                        '0.669847'

========================== row from database ==========================
                                              'id'  474274
                                            'path'  /data/Music/Bulk/00localcharacter/america - country and western songbook - second - 0716/17 - Elvis Presley - Gentle On My Mind.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  204
                                           'genre'  loc-namerica-country
                                        'filesize'  8175811
                                           'mtime'  1621700227
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter america second 0716 17 loc namerica
                                      'tag_artist'  Elvis Presley
                                     'tag_release'  country and western songbook
                                       'tag_title'  Gentle On My Mind
                                             'bpm'  122.585
                                    'search_title'  'gentle':1 'mind':4 'my':3 'on':2
                                   'search_artist'  'elvis':1 'presley':2
                                  'search_release'  'and':2 'country':1 'songbook':4 'western':3
                                     'search_rest'  '0716':3 'america':1 'loc':4 'namerica':5 'second':2
                                    'search_combo'  '0716':13 'america':11 'and':8C 'country':7C 'elvis':5B 'gentle':1A 'loc':14 'mind':4A 'my':3A 'namerica':15 'on':2A 'presley':6B 'second':12 'songbook':10C 'western':9C
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621700227.4528093  (2021-05-22 18:17:07)
                             'size'  8175811