======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '163'
                                          'artist'  'The Beatles'
                                     'text_people'  ''
                                         'release'  'The Beatles [white album]'
                                           'title'  'happiness is a warm gun'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['pop', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '08'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '144.130'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Beatles [white album]'
'TBPM' (BPM (beats per minute))                     '144.130'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'happiness is a warm gun'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '163500'
'TPE1' (Lead performer(s)/Soloist(s))               'The Beatles'
'TPOS' (Part of a set)                              '1/2'
'TRCK' (Track number/Position in set)               '08'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['pop', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.00 dB'
'TXXX:replaygain_track_peak'                        '0.416827'

========================== row from database ==========================
                                              'id'  1526837
                                            'path'  /data/Music/Bulk/00poprockelectronic/Beatles/_68-the beatles (white album)/The Beatles - Happiness is A Warm Gun.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  163
                                           'genre'  rock-cppex-classic
                                        'filesize'  5233699
                                           'mtime'  1636039077
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic _68 the beatles (white album) Happiness A Warm Gun rock cppex classic
                                      'tag_artist'  The Beatles
                                     'tag_release'  The Beatles [white album]
                                       'tag_title'  happiness is a warm gun
                                             'bpm'  144.13
                                    'search_title'  'a':3 'gun':5 'happiness':1 'is':2 'warm':4
                                   'search_artist'  'beatles':2 'the':1
                                  'search_release'  'album':5,6 'beatles':2 'the':1 'white':3,4
                                     'search_rest'  '00poprockelectronic':1 '68':2 'a':10 'album':7,8 'beatles':4 'classic':15 'cppex':14 'gun':12 'happiness':9 'rock':13 'the':3 'warm':11 'white':5,6
                                    'search_combo'  '00poprockelectronic':14 '68':15 'a':3A,23 'album':12C,13C,20,21 'beatles':7B,9C,17 'classic':28 'cppex':27 'gun':5A,25 'happiness':1A,22 'is':2A 'rock':26 'the':6B,8C,16 'warm':4A,24 'white':10C,11C,18,19
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8A
                                           '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-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['pop', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1968
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039077.3318613  (2021-11-04 16:17:57)
                             'size'  5233699