======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '772'
                                          'artist'  'BT'
                                     'text_people'  ''
                                         'release'  'Ima (2 Disc Version)'
                                           'title'  'Blue Skies (The Delphinium Days Mix)'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['electronica', 'trance', 'techno', 'electronic', 'dance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '4'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '127.124'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00001439 0000103B 00010CD1'
'COMM:iTunNORM:eng'                                 (' 00001439 0000103B 00010CD1 0000E291 000247AC 00046C3E 000084F5 000083E9 '
 '000A64B6 0002AE05')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007B0 000000000207E7C0 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Ima (2 Disc Version)'
'TBPM' (BPM (beats per minute))                     '127.124'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '1996'
'TENC' (Encoded by)                                 'iTunes v6.0.5'
'TIT2' (Title/songname/content description)         'Blue Skies (The Delphinium Days Mix)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'BT'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '2/4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['electronica', 'trance', 'techno', 'electronic', 'dance']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.95 dB'
'TXXX:replaygain_track_peak'                        '0.375537'

========================== row from database ==========================
                                              'id'  1330345
                                            'path'  /data/Music/Bulk/00poprockelectronic/BT/Ima/2-02 Blue Skies (The Delphinium Days Mix).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  772
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  18588398
                                           'mtime'  1621696106
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 02 electronic generic or radio dance
                                      'tag_artist'  BT
                                     'tag_release'  Ima (2 Disc Version)
                                       'tag_title'  Blue Skies (The Delphinium Days Mix)
                                             'bpm'  127.124
                                    'search_title'  'blue':1 'days':6 'delphinium':5 'mix':7,8 'skies':2 'the':3,4
                                   'search_artist'  'bt':1
                                  'search_release'  '2':2,3 'disc':4 'ima':1 'version':5,6
                                     'search_rest'  '00poprockelectronic':1 'dance':6 'electronic':2 'generic':3 'or':4 'radio':5
                                    'search_combo'  '00poprockelectronic':16 '2':11C,12C 'blue':1A 'bt':9B 'dance':21 'days':6A 'delphinium':5A 'disc':13C 'electronic':17 'generic':18 'ima':10C 'mix':7A,8A 'or':19 'radio':20 'skies':2A 'the':3A,4A 'version':14C,15C
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'trance', 'techno', 'electronic', 'dance']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696106.3673253  (2021-05-22 17:08:26)
                             'size'  18588398