======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '250'
                                          'artist'  'Pyotr Ilyich Tchaikovsky'
                                     'text_people'  ''
                                         'release'  'The Art of the Theremin'
                                           'title'  'Berceuse'
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                                      'lastfmtags'  "['russian', 'composers', 'instrumental', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '12'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-early;mi-theremin'
                                             'bpm'  '140'
                                             'key'  '1A'
                                        'acoustid'  '1e7a7830-e20e-4a1d-95f3-ee93959361c7'
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'The Art of the Theremin'
'TBPM' (BPM (beats per minute))                     '140'
'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)                                '1A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Pyotr Ilyich Tchaikovsky'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Delos'
'TRCK' (Track number/Position in set)               '9/12'
'TSO2'                                              'Rockmore, Clara'
'TSOP' (Performer sort order)                       'Tchaikovsky, Pyotr Ilyich'
'TXXX:Acoustid Id'                                  '1e7a7830-e20e-4a1d-95f3-ee93959361c7'
'TXXX:Artists'                                      'Pyotr Ilyich Tchaikovsky'
'TXXX:BARCODE'                                      '013491101422'
'TXXX:CATALOGNUMBER'                                'D/CD 1014'
'TXXX:MusicBrainz Album Artist Id'                  'f6871779-18e9-4634-b0de-2e33baef8945'
'TXXX:MusicBrainz Album Id'                         'c04dfa5f-0d72-4cc4-b4cb-a15337a5a292'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:MusicBrainz Release Group Id'                 'b637b00a-b9a3-3c5e-b253-64a599701a9f'
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'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['russian', 'composers', 'instrumental', 'romantic', 'classical']
'TXXX:originalyear'                                 '1987'
'TXXX:q-bass'                                       '1'
'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-syn'                                        '3'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.81 dB'
'TXXX:replaygain_track_peak'                        '0.546397'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2d2ddc3d-a0b6-4516-9cae-2b0e253850b0')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Alexander Konstantinovich Glazunov - Clara Rockmore - The Moogs Present Clara Rockmore Virtuoso Theremin pt.2/Clara Rockmore Theremin 09 Tschaikowsky Berceuse.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  250
                                           'genre'  electronic-experimental-early;mi-theremin
                                        'filesize'  10120325
                                           'mtime'  1620527981
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Alexander Konstantinovich Glazunov Clara Rockmore Moogs Present Clara Rockmore Virtuoso pt.2 Clara Rockmore 09 Tschaikowsky electronic experimental early;mi theremin
                                      'tag_artist'  Pyotr Ilyich Tchaikovsky
                                     'tag_release'  The Art of the Theremin
                                       'tag_title'  Berceuse
                                             'bpm'  140.0
                                    'search_title'  'berceuse':1
                                   'search_artist'  'ilyich':2 'pyotr':1 'tchaikovsky':3
                                  'search_release'  'art':2 'of':3 'the':1 'theremin':4
                                     'search_rest'  '2':10 'alexander':1 'clara':4 'early':15,17 'electronic':13 'experimental':14 'glazunov':3 'konstantinovich':2 'mi':16,18 'moogs':6 'present':7 'pt':9 'pt2':11 'rockmore':5 'theremin':19 'tschaikowsky':12 'virtuoso':8
                                    'search_combo'  '2':18 'alexander':9 'art':6C 'berceuse':1A 'clara':12 'early':23,25 'electronic':21 'experimental':22 'glazunov':11 'ilyich':3B 'konstantinovich':10 'mi':24,26 'moogs':14 'of':7C 'present':15 'pt':17 'pt2':19 'pyotr':2B 'rockmore':13 'tchaikovsky':4B 'the':5C 'theremin':8C,27 'tschaikowsky':20 'virtuoso':16
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', '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-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['russian', 'composers', 'instrumental', 'romantic', 'classical']
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527980.6658075  (2021-05-09 04:39:40)
                             'size'  10120325