======================== unified (from filesystem) ========================
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                                        'duration'  '466'
                                          'artist'  'DJ Shadow'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '13'
                                            'date'  '1996'
                                        'comments'  ''
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                                             'bpm'  '87.558'
                                             'key'  '3A'
                                        'acoustid'  '644523d4-cbfb-4137-9aa6-630776ccb817'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '87.558'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '1996-11-19'
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'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'DJ Shadow'
'TPE2' (Band/orchestra/accompaniment)               'DJ Shadow'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'FFRR/Mo Wax'
'TRCK' (Track number/Position in set)               '4/13'
'TSO2'                                              'Shadow, DJ'
'TSOP' (Performer sort order)                       'Shadow, DJ'
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'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
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'TXXX:lastfmtags'                                   ['electronica', 'electronic', 'trip hop', 'hip hop', 'turntablism']
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'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
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'TXXX:replaygain_track_peak'                        '0.383893'
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========================== row from database ==========================
                                              'id'  1321950
                                            'path'  /data/Music/Bulk/00poprockelectronic/DJ Shadow/DJ.Shadow.Endtroducing.1998/04 - DJ Shadow - Changeling.mp3
                                         'working'  None
                                         'bitrate'  166
                                    'duration_sec'  466
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  9739489
                                           'mtime'  1620568765
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic DJ.Shadow.Endtroducing.1998 04 hip hop or rnb or rap or turntablism
                                      'tag_artist'  DJ Shadow
                                     'tag_release'  Endtroducing.....
                                       'tag_title'  Changeling / Transmission 1
                                             'bpm'  87.558
                                    'search_title'  '1':3 'changeling':1 'transmission':2
                                   'search_artist'  'dj':1 'shadow':2
                                  'search_release'  'endtroducing':1,2
                                     'search_rest'  '00poprockelectronic':1 '1998':5 'dj':2 'djshadowendtroducing1998':6 'endtroducing':4 'hip':7 'hop':8 'or':9 'rap':11 'rnb':10 'shadow':3 'turntablism':12
                                    'search_combo'  '00poprockelectronic':8 '1':3A '1998':12 'changeling':1A 'dj':4B,9 'djshadowendtroducing1998':13 'endtroducing':6C,7C,11 'hip':14 'hop':15 'or':16 'rap':18 'rnb':17 'shadow':5B,10 'transmission':2A 'turntablism':19
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'electronic', 'trip hop', 'hip hop', 'turntablism']
                                        'tag_date'  1996
                                     'discogstags'  ['electronic', 'hip hop', 'instrumental', 'downtempo', 'cut-up/dj', 'trip hop']

============================== file details ==============================
                                           'mtime'  1620568764.9635103  (2021-05-09 15:59:24)
                             'size'  9739489