======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '272'
                                          'artist'  'Creative Source'
                                     'text_people'  ''
                                         'release'  'baad assss soul 1'
                                           'title'  'Harlem'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', "
 "'q-busy-3', 'q-grit-2', 'q-play-3', 'Q-OLDST-2', 'q-chart-2', 'q-drums-4', "
 "'q-other-1', 'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['funk', 'soul', 'disco', '70s']"
                                     'discogstags'  "['funk / soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '001'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '128.7'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'baad assss soul 1'
'TBPM' (BPM (beats per minute))                     '128.7'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         'Harlem'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Creative Source'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '001'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'funk / soul'
'TXXX:lastfmtags'                                   ['funk', 'soul', 'disco', '70s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.544771'

========================== row from database ==========================
                                              'id'  1113976
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/baad asssss soul 1/001 Creative Source - Harlem(1974).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  272
                                           'genre'  funk or soul
                                        'filesize'  4358545
                                           'mtime'  1628357902
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk asssss 001 Harlem(1974) funk or
                                      'tag_artist'  Creative Source
                                     'tag_release'  baad assss soul 1
                                       'tag_title'  Harlem
                                             'bpm'  128.7
                                    'search_title'  'harlem':1
                                   'search_artist'  'creative':1 'source':2
                                  'search_release'  '1':4 'assss':2 'baad':1 'soul':3
                                     'search_rest'  '1974':5 'asssss':3 'funk':2 'harlem':4 'harlem1974':6 'or':7 'swing':1
                                    'search_combo'  '1':7C '1974':12 'assss':5C 'asssss':10 'baad':4C 'creative':2B 'funk':9 'harlem':1A,11 'harlem1974':13 'or':14 'soul':6C 'source':3B 'swing':8
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['funk', 'soul', 'disco', '70s']
                                        'tag_date'  1974
                                     'discogstags'  ['funk / soul']

============================== file details ==============================
                                           'mtime'  1628357902.1723096  (2021-08-07 19:38:22)
                             'size'  4358545