======================== unified (from filesystem) ========================
                                         'bitrate'  '194.524'
                                        'duration'  '206'
                                          'artist'  'The Black Keys'
                                     'text_people'  ''
                                         'release'  'iTunes Session'
                                           'title'  'Chop & Change (iTunes Session)'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues rock', 'indie', 'blues', 'indie rock', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '10'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-rock'
                                             'bpm'  '108.008'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'iTunes Session'
'TBPM' (BPM (beats per minute))                     '108.008'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-rock'
'TCOP' (Copyright message)                          '℗ 2010 Nonesuch Records, Inc.'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'Chop & Change (iTunes Session)'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Black Keys'
'TPE2' (Band/orchestra/accompaniment)               'The Black Keys'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1/10'
'TSOP' (Performer sort order)                       'Black Keys'
'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'
'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>7371791</integer>\n'
 '\t\t<key>flavor</key>\n'
 '\t\t<string>2:256</string>\n'
 '\t</dict>\n'
 '</dict>\n'
 '</plist>\n')
'TXXX:lastfmtags'                                   ['blues rock', 'indie', 'blues', 'indie rock', 'rock']
'TXXX:purchaseaccount'                              'dworthen@ryerson.ca'
'TXXX:purchasedate'                                 '2010-10-19 14:40:22'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.10 dB'
'TXXX:replaygain_track_peak'                        '0.433479'

========================== row from database ==========================
                                              'id'  1373823
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/The Black Keys/The Black Keys - iTunes Session (2010) [AAC]/01 Chop & Change (iTunes Session).mp3
                                         'working'  None
                                         'bitrate'  194
                                    'duration_sec'  206
                                           'genre'  ifs-songwriter-indie-rock
                                        'filesize'  5102583
                                           'mtime'  1637330336
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock (2010) [AAC] 01 ifs songwriter indie rock
                                      'tag_artist'  The Black Keys
                                     'tag_release'  iTunes Session
                                       'tag_title'  Chop & Change (iTunes Session)
                                             'bpm'  108.008
                                    'search_title'  'change':2 'chop':1 'i':7,8 'itunes':3,4 'session':5,6 'tunes':9
                                   'search_artist'  'black':2 'keys':3 'the':1
                                  'search_release'  'i':3 'itunes':1 'session':2 'tunes':4
                                     'search_rest'  '00poprockelectronic':1 '2010':4,5 'aac':6,7 'ifs':8 'indie':10 'indierock':3 'poprock':2 'rock':11 'songwriter':9
                                    'search_combo'  '00poprockelectronic':17 '2010':20,21 'aac':22,23 'black':11B 'change':2A 'chop':1A 'i':7A,8A,15C 'ifs':24 'indie':26 'indierock':19 'itunes':3A,4A,13C 'keys':12B 'poprock':18 'rock':27 'session':5A,6A,14C 'songwriter':25 'the':10B 'tunes':9A,16C
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', 'indie', 'blues', 'indie rock', 'rock']
                                        'tag_date'  2010
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1637330336.460267  (2021-11-19 14:58:56)
                             'size'  5102583