======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '133'
                                          'artist'  'Maxence Cyrin'
                                     'text_people'  ''
                                         'release'  'Modern Rhapsodies'
                                           'title'  'L.F.O.'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  ("['fip', 'neo classical', 'modern classical', 'instrumental', 'ambient', "
 "'piano']")
                                     'discogstags'  "['electronic', 'modern classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '14'
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments;set-cover or covered'
                                             'bpm'  '145.3'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments', 'set-cover or covered']
'TDOR' (Original release time)                      '2005'
'TDRC' (Recording time)                             '2005-10-24'
'TIT2' (Title/songname/content description)         'L.F.O.'
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Maxence Cyrin'
'TPE2' (Band/orchestra/accompaniment)               'Maxence Cyrin'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'F Communications'
'TRCK' (Track number/Position in set)               '13/14'
'TSO2'                                              'Cyrin, Maxence'
'TSOP' (Performer sort order)                       'Cyrin, Maxence'
'TSRC' (ISRC (international standard recording code))  'FRV220502190'
'TXXX:ASIN'                                         'B000BQORES'
'TXXX:BARCODE'                                      '5413356090321'
'TXXX:CATALOGNUMBER'                                'F 236 CD'
'TXXX:MusicBrainz Album Artist Id'                  '7947dab4-4274-46f4-bc11-135561c110b7'
'TXXX:MusicBrainz Album Id'                         '80ad6ff0-b0ce-4104-a48c-4b4cbe81c68b'
'TXXX:MusicBrainz Album Release Country'            'FR'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '7947dab4-4274-46f4-bc11-135561c110b7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'modern classical']
'TXXX:lastfmtags'                                   ['fip', 'neo classical', 'modern classical', 'instrumental', 'ambient', 'piano']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.30 dB'
'TXXX:replaygain_track_peak'                        '0.696447'
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========================== row from database ==========================
                                              'id'  1117151
                                            'path'  /data/Music/Bulk/00instruments-classical/Maxence Cyrin - modern rhapsodies/13 l.f.o. (original by lfo).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  133
                                           'genre'  prerock-classical or classical instruments;set-cover or covered
                                        'filesize'  3213312
                                           'mtime'  1636913589
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical modern rhapsodies 13 l.f.o. (original by lfo) prerock classical or classical instruments;set cover or covered
                                      'tag_artist'  Maxence Cyrin
                                     'tag_release'  Modern Rhapsodies
                                       'tag_title'  L.F.O.
                                             'bpm'  145.3
                                    'search_title'  'f':2 'l':1 'lfo':4 'o':3
                                   'search_artist'  'cyrin':2 'maxence':1
                                  'search_release'  'modern':1 'rhapsodies':2
                                     'search_rest'  '00instruments':1 'by':11 'classical':2 'cover':19 'covered':20 'f':6 'instruments':15,17 'l':5 'lfo':8,12 'modern':3 'o':7 'or':14 'original':9,10 'prerock':13 'rhapsodies':4 'set':16,18
                                    'search_combo'  '00instruments':9 'by':19 'classical':10 'cover':27 'covered':28 'cyrin':6B 'f':2A,14 'instruments':23,25 'l':1A,13 'lfo':4A,16,20 'maxence':5B 'modern':7C,11 'o':3A,15 'or':22 'original':17,18 'prerock':21 'rhapsodies':8C,12 'set':24,26
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['fip', 'neo classical', 'modern classical', 'instrumental', 'ambient', 'piano']
                                        'tag_date'  2005
                                     'discogstags'  ['electronic', 'modern classical']

============================== file details ==============================
                                           'mtime'  1636913589.186259  (2021-11-14 19:13:09)
                             'size'  3213312