======================== unified (from filesystem) ========================
                                         'bitrate'  '162.975'
                                        'duration'  '307'
                                          'artist'  "Guns N' Roses"
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  "Ain't It Fun"
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', '80s', 'hard rock', 'metal', 'rock']"
                                     'discogstags'  "['rock', 'hard rock', 'glam']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '84.916'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '84.916'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         "Ain't It Fun"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               "Guns N' Roses"
'TRCK' (Track number/Position in set)               '12'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'hard rock', 'glam']
'TXXX:lastfmtags'                                   ['classic rock', '80s', 'hard rock', 'metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.07 dB'
'TXXX:replaygain_track_peak'                        '0.463384'

========================== row from database ==========================
                                              'id'  1530438
                                            'path'  /data/Music/Bulk/00poprockelectronic/album top 1000/0229 Guns N_ Roses - Greatest hits/Greatest Hits-12-Ain_t It Fun.mp3
                                         'working'  None
                                         'bitrate'  163
                                    'duration_sec'  307
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  6274758
                                           'mtime'  1620573553
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic album top 1000 0229 N_ hits 12 Ain_t electronic generic or radio unsorted
                                      'tag_artist'  Guns N' Roses
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Ain't It Fun
                                             'bpm'  84.916
                                    'search_title'  'ain':1 'aint':3 'fun':5 'it':4 't':2
                                   'search_artist'  'guns':1 'n':2,3 'roses':4
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00poprockelectronic':1 '0229':5 '1000':4 'ain':8 'album':2 'electronic':10 'generic':11 'hits':7 'n':6 'or':12 'radio':13 't':9 'top':3 'unsorted':14
                                    'search_combo'  '00poprockelectronic':12 '0229':16 '1000':15 'ain':1A,19 'aint':3A 'album':13 'electronic':21 'fun':5A 'generic':22 'greatest':10C 'guns':6B 'hits':11C,18 'it':4A 'n':7B,8B,17 'or':23 'radio':24 'roses':9B 't':2A,20 'top':14 'unsorted':25
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', '80s', 'hard rock', 'metal', 'rock']
                                        'tag_date'  2004
                                     'discogstags'  ['rock', 'hard rock', 'glam']

============================== file details ==============================
                                           'mtime'  1620573552.618055  (2021-05-09 17:19:12)
                             'size'  6274758