======================== unified (from filesystem) ========================
                                         'bitrate'  '207.907'
                                        'duration'  '321'
                                          'artist'  'Oliver'
                                     'text_people'  ''
                                         'release'  'Oliver Overload'
                                           'title'  'MYB'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['60s', 'house', 'electronic', 'psychedelic', 'pop']"
                                     'discogstags'  "['punk', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '4'
                                            'date'  '2013'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '124.011'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Oliver Overload'
'TBPM' (BPM (beats per minute))                     '124.011'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TCOP' (Copyright message)                          "℗ 2013 Fool's Gold Records"
'TDRC' (Recording time)                             '2013'
'TIT2' (Title/songname/content description)         'MYB'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Oliver'
'TPE2' (Band/orchestra/accompaniment)               'Oliver'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1/4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['punk', 'rock']
'TXXX:iTunMOVI'                                     ('<?xml version="1.0" encoding="UTF-8"?>\n'
 '<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" '
 '"http://www.apple.com/DTDs/PropertyList-1.0.dtd">\n'
 '<plist version="1.0">\n'
 '<dict>\n'
 '\t<key>asset-info</key>\n'
 '\t<dict>\n'
 '\t\t<key>file-size</key>\n'
 '\t\t<integer>11938910</integer>\n'
 '\t\t<key>flavor</key>\n'
 '\t\t<string>HQ</string>\n'
 '\t</dict>\n'
 '</dict>\n'
 '</plist>\n')
'TXXX:lastfmtags'                                   ['60s', 'house', 'electronic', 'psychedelic', 'pop']
'TXXX:purchaseaccount'                              'glewis222@gmail.com'
'TXXX:purchasedate'                                 '2013-01-22 04:34:05'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.29 dB'
'TXXX:replaygain_track_peak'                        '0.476010'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1348957
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/01 MYB.mp3
                                         'working'  None
                                         'bitrate'  207
                                    'duration_sec'  321
                                           'genre'  electronic-unsorted
                                        'filesize'  8464180
                                           'mtime'  1620572520
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 01 electronic unsorted
                                      'tag_artist'  Oliver
                                     'tag_release'  Oliver Overload
                                       'tag_title'  MYB
                                             'bpm'  124.011
                                    'search_title'  'myb':1
                                   'search_artist'  'oliver':1
                                  'search_release'  'oliver':1 'overload':2
                                     'search_rest'  '00poprockelectronic':1 'electronic':7 'files':5,6 'loose':3,4 'unsorted':2
                                    'search_combo'  '00poprockelectronic':5 'electronic':11 'files':9,10 'loose':7,8 'myb':1A 'oliver':2B,3C 'overload':4C 'unsorted':6
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['60s', 'house', 'electronic', 'psychedelic', 'pop']
                                        'tag_date'  2013
                                     'discogstags'  ['punk', 'rock']

============================== file details ==============================
                                           'mtime'  1620572520.185518  (2021-05-09 17:02:00)
                             'size'  8464180