======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '177'
                                          'artist'  'The Redcoats'
                                     'text_people'  ''
                                         'release'  'The Redcoats'
                                           'title'  'Big Name Button (live)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['beat', 'two or more artists with the same name']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  '22'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-gr-punk-indie'
                                             'bpm'  '123.8'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         'blog.wfmu.org'
'COMM:iTunNORM:eng'                                 (' 00000283 0000048E 00001265 0000216B 0002463E 000295A1 00003DEF 0000539A '
 '00024B72 0002B3BC')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A74 0000000000777B7C 00000000 0040F979 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_1:eng'                            '640ED016+284620+22+180+11112+29893+41502+51387+59624+70836+85285+100308+115943+125902+139219+152224+164255+175274+187329+200300+212180+221616+231891+251116+268807'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '11'
'TALB' (Album/Movie/Show title)                     'The Redcoats'
'TBPM' (BPM (beats per minute))                     '123.8'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk-indie'
'TENC' (Encoded by)                                 'iTunes v7.1.1'
'TIT2' (Title/songname/content description)         'Big Name Button (live)'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Redcoats'
'TRCK' (Track number/Position in set)               '11/22'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['beat', 'two or more artists with the same name']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.39 dB'
'TXXX:replaygain_track_peak'                        '0.546475'

========================== row from database ==========================
                                              'id'  660187
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/10/291_10_The_Redcoats_-_Big_Name_Button_live.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  177
                                           'genre'  rock-gr-punk-indie
                                        'filesize'  4596210
                                           'mtime'  1636914724
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 10 291_10_The_Redcoats_ _Big_Name_Button_live rock gr punk indie
                                      'tag_artist'  The Redcoats
                                     'tag_release'  The Redcoats
                                       'tag_title'  Big Name Button (live)
                                             'bpm'  123.8
                                    'search_title'  'big':1 'button':3 'live':4,5 'name':2
                                   'search_artist'  'redcoats':2 'the':1
                                  'search_release'  'redcoats':2 'the':1
                                     'search_rest'  '10':2 '291':1 'big':5 'button':7 'gr':10 'indie':12 'live':8 'name':6 'punk':11 'redcoats':4 'rock':9 'the':3
                                    'search_combo'  '10':11 '291':10 'big':1A,14 'button':3A,16 'gr':19 'indie':21 'live':4A,5A,17 'name':2A,15 'punk':20 'redcoats':7B,9C,13 'rock':18 'the':6B,8C,12
                                    'tag_tracknum'  11
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['beat', 'two or more artists with the same name']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636914723.5597878  (2021-11-14 19:32:03)
                             'size'  4596210