======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '202'
                                          'artist'  'Albert Hammond'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  "I'm a Train"
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['soft rock', 'singer songwriter', 'pop', 'oldies', '70s']"
                                     'discogstags'  "['rock', 'folk rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '135.8'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=128, count=0)
'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '135.8'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         "I'm a Train"
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Albert Hammond'
'TPE2' (Band/orchestra/accompaniment)               'Albert Hammond'
'TRCK' (Track number/Position in set)               '4'
'TXXX:FMPS_Rating'                                  '0.6'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk rock', 'classic rock']
'TXXX:lastfmtags'                                   ['soft rock', 'singer songwriter', 'pop', 'oldies', '70s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.90 dB'
'TXXX:replaygain_track_peak'                        '0.685460'

========================== row from database ==========================
                                              'id'  1499490
                                            'path'  /data/Music/Bulk/00poprockelectronic/Albert Hammond/Greatest Hits__MBZ;#Albert Hammond;#Greatest Hits;#04;#I_m a Train.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  202
                                           'genre'  rock-unsorted
                                        'filesize'  3265099
                                           'mtime'  1647276825
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Hits__MBZ;#Albert Hammond;#Greatest Hits;#04;#I_m rock unsorted
                                      'tag_artist'  Albert Hammond
                                     'tag_release'  Greatest Hits
                                       'tag_title'  I'm a Train
                                             'bpm'  135.8
                                    'search_title'  'a':4 'i':1 'im':3 'm':2 'train':5
                                   'search_artist'  'albert':1 'hammond':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00poprockelectronic':1 '04':13,17 'albert':4,7 'greatest':9,11 'hammond':8,10 'hits':2,5,12,16 'i':14,18 'm':15,19 'mbz':3,6 'rock':20 'unsorted':21
                                    'search_combo'  '00poprockelectronic':10 '04':22,26 'a':4A 'albert':6B,13,16 'greatest':8C,18,20 'hammond':7B,17,19 'hits':9C,11,14,21,25 'i':1A,23,27 'im':3A 'm':2A,24,28 'mbz':12,15 'rock':29 'train':5A 'unsorted':30
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']
                                      'lastfmtags'  ['soft rock', 'singer songwriter', 'pop', 'oldies', '70s']
                                        'tag_date'  1972
                                     'discogstags'  ['rock', 'folk rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1647276825.1382372  (2022-03-14 17:53:45)
                             'size'  3265099