======================== unified (from filesystem) ========================
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                                        'duration'  '185'
                                          'artist'  'Igor Stravinsky'
                                     'text_people'  ''
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                                           'title'  'Berceuse'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
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                                      'lastfmtags'  ("['contemporary classical', 'russian', 'composers', '20th century classical', "
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '12'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-early;mi-theremin'
                                             'bpm'  '95'
                                             'key'  '2A'
                                        'acoustid'  'd7a54b77-b846-4d4e-9097-d0f47bc9da98'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '95'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-early', 'mi-theremin']
'TDOR' (Original release time)                      '1987'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'Berceuse'
'TKEY' (Initial key)                                '2A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Igor Stravinsky'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Delos'
'TRCK' (Track number/Position in set)               '7/12'
'TSO2'                                              'Rockmore, Clara'
'TSOP' (Performer sort order)                       'Stravinsky, Igor'
'TXXX:Acoustid Id'                                  'd7a54b77-b846-4d4e-9097-d0f47bc9da98'
'TXXX:Artists'                                      'Igor Stravinsky'
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'TXXX:CATALOGNUMBER'                                'D/CD 1014'
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'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'                                   ['contemporary classical',
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 'composers',
 '20th century classical',
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'TXXX:originalyear'                                 '1987'
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'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.36 dB'
'TXXX:replaygain_track_peak'                        '0.635257'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'd7048c2b-943e-4c7e-b62c-d23189a67cd5')

========================== row from database ==========================
                                              'id'  1377907
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Alexander Konstantinovich Glazunov - Clara Rockmore - The Moogs Present Clara Rockmore Virtuoso Theremin pt.2/Clara Rockmore Theremin 07 Stravinsky Berceuse.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  185
                                           'genre'  electronic-experimental-early;mi-theremin
                                        'filesize'  7500182
                                           'mtime'  1620527980
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Alexander Konstantinovich Glazunov Clara Rockmore Moogs Present Clara Rockmore Virtuoso pt.2 Clara Rockmore 07 electronic experimental early;mi theremin
                                      'tag_artist'  Igor Stravinsky
                                     'tag_release'  The Art of the Theremin
                                       'tag_title'  Berceuse
                                             'bpm'  95.0
                                    'search_title'  'berceuse':1
                                   'search_artist'  'igor':1 'stravinsky':2
                                  'search_release'  'art':2 'of':3 'the':1 'theremin':4
                                     'search_rest'  '2':10 'alexander':1 'clara':4 'early':14,16 'electronic':12 'experimental':13 'glazunov':3 'konstantinovich':2 'mi':15,17 'moogs':6 'present':7 'pt':9 'pt2':11 'rockmore':5 'theremin':18 'virtuoso':8
                                    'search_combo'  '2':17 'alexander':8 'art':5C 'berceuse':1A 'clara':11 'early':21,23 'electronic':19 'experimental':20 'glazunov':10 'igor':2B 'konstantinovich':9 'mi':22,24 'moogs':13 'of':6C 'present':14 'pt':16 'pt2':18 'rockmore':12 'stravinsky':3B 'the':4C 'theremin':7C,25 'virtuoso':15
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-3', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['contemporary classical', 'russian', 'composers', '20th century classical', 'classical']
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527979.748688  (2021-05-09 04:39:39)
                             'size'  7500182