======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '136'
                                          'artist'  ('Adele Addison, Jane Hobson, Richard Lewis, Donald Bell, The Cleveland '
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                                     'text_people'  'Sarasate, Pablo de'
                                         'release'  'Nodame Cantabile Best100'
                                           'title'  'Carmen Fantasy, Op.25 - 1. Moderato'
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                                      'lastfmtags'  "['conductor', 'classical']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '9'
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '144.0'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'TBPM' (BPM (beats per minute))                     '144.0'
'TCOM' (Composer)                                   'Sarasate, Pablo de'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1992'
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'TIT2' (Title/songname/content description)         'Carmen Fantasy, Op.25 - 1. Moderato'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               ['Adele Addison, Jane Hobson, Richard Lewis, Donald Bell, The Cleveland '
 'Orchestra Chorus, Robert Shaw, GeorgeSzell',
 'The Cleveland Orchestra']
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '2/8'
'TRCK' (Track number/Position in set)               '6/9'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['conductor', 'classical']
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'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.34 dB'
'TXXX:replaygain_track_peak'                        '0.981996'

========================== row from database ==========================
                                              'id'  382615
                                            'path'  /data/Music/Bulk/00instruments-classical/Compilations/Nodame Cantabile Best100/2-06 Carmen Fantasy, Op.25 - 1. Moderato.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  136
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3308936
                                           'mtime'  1620561505
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Compilations 06 prerock classical classical instruments
                                      'tag_artist'  Adele Addison, Jane Hobson, Richard Lewis, Donald Bell, The Cleveland Orchestra Chorus, Robert Shaw, GeorgeSzell
                                     'tag_release'  Nodame Cantabile Best100
                                       'tag_title'  Carmen Fantasy, Op.25 - 1. Moderato
                                             'bpm'  144.0
                                    'search_title'  '1':7,8 '25':5 'carmen':1 'fantasy':2,3 'moderato':9 'op':4 'op25':6
                                   'search_artist'  'addison':2,3 'adele':1 'bell':11,12 'chorus':16,17 'cleveland':14 'donald':10 'george':22 'georgeszell':21 'hobson':5,6 'jane':4 'lewis':8,9 'orchestra':15 'richard':7 'robert':18 'shaw':19,20 'szell':23 'the':13
                                  'search_release'  'best100':3 'cantabile':2 'nodame':1
                                     'search_rest'  '00instruments':1 'classical':2 'compilations':3 'instruments':5 'prerock':4
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                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['conductor', 'classical']
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561504.8450248  (2021-05-09 13:58:24)
                             'size'  3308936