======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '291'
                                          'artist'  'Dire Straits'
                                     'text_people'  ''
                                         'release'  'Alchemy (disc 2)'
                                           'title'  'Two Young Lovers'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                                      'lastfmtags'  "['80s', 'guitar', 'blues', 'rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1984'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '115.064'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Alchemy (disc 2)'
'TBPM' (BPM (beats per minute))                     '115.064'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1984'
'TIT2' (Title/songname/content description)         'Two Young Lovers'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Dire Straits'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'guitar', 'blues', 'rock', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.76 dB'
'TXXX:replaygain_track_peak'                        '0.636891'

========================== row from database ==========================
                                              'id'  1412475
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Dire Straits/Dire_Straits_and_M_Knopfler/MBZ;#Dire Straits;#Alchemy (disc 2);#01;#Two Young Lovers.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  291
                                           'genre'  rock-cppex
                                        'filesize'  4671123
                                           'mtime'  1620736130
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Dire_Straits_and_M_Knopfler MBZ;#Dire Straits;#Alchemy 2);#01;#Two rock cppex
                                      'tag_artist'  Dire Straits
                                     'tag_release'  Alchemy (disc 2)
                                       'tag_title'  Two Young Lovers
                                             'bpm'  115.064
                                    'search_title'  'lovers':3 'two':1 'young':2
                                   'search_artist'  'dire':1 'straits':2
                                  'search_release'  '2':4,5 'alchemy':1 'disc':2,3
                                     'search_rest'  '01':16,19 '2':15,18 'alchemy':12,14 'and':4 'classicprogpsy':1 'cppex':22 'dire':2,8,10 'knopfler':6 'm':5 'mbz':7,9 'rock':21 'straits':3,11,13 'two':17,20
                                    'search_combo'  '01':26,29 '2':9C,10C,25,28 'alchemy':6C,22,24 'and':14 'classicprogpsy':11 'cppex':32 'dire':4B,12,18,20 'disc':7C,8C 'knopfler':16 'lovers':3A 'm':15 'mbz':17,19 'rock':31 'straits':5B,13,21,23 'two':1A,27,30 'young':2A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'guitar', 'blues', 'rock', 'classic rock']
                                        'tag_date'  1984
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736129.5707862  (2021-05-11 14:28:49)
                             'size'  4671123