======================== unified (from filesystem) ========================
                                         'bitrate'  '191.962'
                                        'duration'  '153'
                                          'artist'  'The Beatles'
                                     'text_people'  ''
                                         'release'  'Beatles for Sale'
                                           'title'  "I'm a Loser"
                                           'quals'  ("['Q-HAP-3', '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-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['pop', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '14'
                                            'date'  '1964'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '90'
                                             'key'  '9B'
                                        'acoustid'  '2ca498a2-e20d-43c1-83bf-956ebed045f9'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Beatles for Sale'
'TBPM' (BPM (beats per minute))                     '90'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDOR' (Original release time)                      '1964'
'TDRC' (Recording time)                             '1964-12-04'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'George Martin']])
'TIT2' (Title/songname/content description)         "I'm a Loser"
'TKEY' (Initial key)                                '9B'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'The Beatles'
'TPE2' (Band/orchestra/accompaniment)               'The Beatles'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Parlophone'
'TRCK' (Track number/Position in set)               '2/14'
'TSO2'                                              'Beatles, The'
'TSOP' (Performer sort order)                       'Beatles, The'
'TSRC' (ISRC (international standard recording code))  'GBAYE0401925/GBAYE0900647'
'TXXX:Acoustid Id'                                  '2ca498a2-e20d-43c1-83bf-956ebed045f9'
'TXXX:Artists'                                      'The Beatles'
'TXXX:CATALOGNUMBER'                                'PMC 1240'
'TXXX:MusicBrainz Album Artist Id'                  'b10bbbfc-cf9e-42e0-be17-e2c3e1d2600d'
'TXXX:MusicBrainz Album Id'                         'c9f28bf9-3e03-4da2-b0b8-5d76691df7de'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'b10bbbfc-cf9e-42e0-be17-e2c3e1d2600d'
'TXXX:MusicBrainz Release Group Id'                 'f50a3b6f-27f0-3832-bd3f-3568dc557d95'
'TXXX:MusicBrainz Release Track Id'                 'a9b596fa-da53-3e72-985a-61468453f94f'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['pop', 'rock', '60s', 'british', 'classic rock']
'TXXX:originalyear'                                 '1964'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.37 dB'
'TXXX:replaygain_track_peak'                        '0.384950'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'e1535aec-d9c8-4241-b74a-cfe149aeffba')
'USLT::XXX'                                         ("I'm a loser\n"
 "I'm a loser\n"
 "And I'm not what I appear to be\n"
 '\n'
 'Of all the love I have won or have lost\n'
 'there is one love I should never have crossed\n'
 'She was a girl in a million, my friend\n'
 'I should have known she would win in the end\n'
 '\n'
 "I'm a loser\n"
 "And I lost someone who's near to me\n"
 "I'm a loser\n"
 "And I'm not what I appear to be\n"
 '\n'
 'Although I laugh and I act like a clown\n'
 'Beneath this mask I am wearing a frown\n'
 'My tears are falling like rain from the sky\n'
 'Is it for her or myself that I cry\n'
 '\n'
 "I'm a loser\n"
 "And I lost someone who's near to me\n"
 "I'm a loser\n"
 "And I'm not what I appear to be\n"
 '\n'
 'What have I done to deserve such a fate\n'
 'I realize I have left it too late\n'
 "And so it's true, pride comes before a fall\n"
 "I'm telling you so that you won't lose all\n"
 '\n'
 "I'm a loser\n"
 "And I lost someone who's near to me\n"
 "I'm a loser\n"
 "And I'm not what I appear to be")

========================== row from database ==========================
                                              'id'  1530925
                                            'path'  /data/Music/Bulk/00poprockelectronic/Beatles/_64-beatles for sale/The Beatles - I_m A Loser.mp3
                                         'working'  None
                                         'bitrate'  191
                                    'duration_sec'  153
                                           'genre'  rock-cppex-classic
                                        'filesize'  3756546
                                           'mtime'  1636039039
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic _64 beatles sale I_m A rock cppex classic
                                      'tag_artist'  The Beatles
                                     'tag_release'  Beatles for Sale
                                       'tag_title'  I'm a Loser
                                             'bpm'  90.0
                                    'search_title'  'a':4 'i':1 'im':3 'loser':5 'm':2
                                   'search_artist'  'beatles':2 'the':1
                                  'search_release'  'beatles':1 'for':2 'sale':3
                                     'search_rest'  '00poprockelectronic':1 '64':2 'a':7 'beatles':3 'classic':10 'cppex':9 'i':5 'm':6 'rock':8 'sale':4
                                    'search_combo'  '00poprockelectronic':11 '64':12 'a':4A,17 'beatles':7B,8C,13 'classic':20 'cppex':19 'for':9C 'i':1A,15 'im':3A 'loser':5A 'm':2A,16 'rock':18 'sale':10C,14 'the':6B
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['pop', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1964
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039038.884629  (2021-11-04 16:17:18)
                             'size'  3756546