======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '461'
                                          'artist'  'My Cat Is an Alien'
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                                           'title'  'Landscapes of an Electric City: 2nd Movement'
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                                      'lastfmtags'  "['noise', 'drone', 'avant garde', 'experimental', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '3'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '140.5'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

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'COMM:Songs-DB_Custom1:XXX'                         'done'
'COMM:Songs-DB_Custom2:XXX'                         'lars'
'COMM:Songs-DB_Custom4:XXX'                         'ita'
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'TBPM' (BPM (beats per minute))                     '140.5'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDOR' (Original release time)                      '2001'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Landscapes of an Electric City: 2nd Movement'
'TKEY' (Initial key)                                '10A'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'My Cat Is an Alien'
'TPE2' (Band/orchestra/accompaniment)               'My Cat Is an Alien'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Ecstatic Peace!'
'TRCK' (Track number/Position in set)               '2/3'
'TSO2'                                              'My Cat Is an Alien'
'TSOP' (Performer sort order)                       'My Cat Is an Alien'
'TXXX:Artists'                                      'My Cat Is an Alien'
'TXXX:CATALOGNUMBER'                                'E# 54b'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '10e9d0e3-6485-4d55-80be-3d8b91a4944c'
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'TXXX:MusicBrainz Release Track Id'                 '988f8274-163c-36f2-816e-51cbb4b278f8'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['noise', 'drone', 'avant garde', 'experimental', 'ambient']
'TXXX:originalyear'                                 '2001'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+3.04 dB'
'TXXX:replaygain_track_peak'                        '0.353313'
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========================== row from database ==========================
                                              'id'  1244378
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/My Cat Is an Alien - (2002) landscapes of an electric city-hypnotic spaces/02 - untitled.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  461
                                           'genre'  electronic-experimental
                                        'filesize'  11145156
                                           'mtime'  1636916948
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm (2002) landscapes electric city hypnotic spaces 02 untitled electronic experimental
                                      'tag_artist'  My Cat Is an Alien
                                     'tag_release'  Landscapes of an Electric City / Hypnotic Spaces
                                       'tag_title'  Landscapes of an Electric City: 2nd Movement
                                             'bpm'  140.5
                                    'search_title'  '2nd':7 'an':3 'city':5,6 'electric':4 'landscapes':1 'movement':8 'of':2
                                   'search_artist'  'alien':5 'an':4 'cat':2 'is':3 'my':1
                                  'search_release'  'an':3 'city':5 'electric':4 'hypnotic':6 'landscapes':1 'of':2 'spaces':7
                                     'search_rest'  '2002':1,2 'city':5 'electric':4 'electronic':9 'experimental':10 'hypnotic':6 'landscapes':3 'spaces':7 'untitled':8
                                    'search_combo'  '2002':21,22 '2nd':7A 'alien':13B 'an':3A,12B,16C 'cat':10B 'city':5A,6A,18C,25 'electric':4A,17C,24 'electronic':29 'experimental':30 'hypnotic':19C,26 'is':11B 'landscapes':1A,14C,23 'movement':8A 'my':9B 'of':2A,15C 'spaces':20C,27 'untitled':28
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['noise', 'drone', 'avant garde', 'experimental', 'ambient']
                                        'tag_date'  2001
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636916947.9153664  (2021-11-14 20:09:07)
                             'size'  11145156