======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '153'
                                          'artist'  'Yefim Bronfman'
                                     'text_people'  'Stravinsky, Igor'
                                         'release'  'Nodame Cantabile Best100'
                                           'title'  'Petrouchka - 1. Russian Dance'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['piano', 'classical', 'clasica', 'brahms']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '13'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments;soundtrack-video'
                                             'bpm'  '117.1'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         ['0',
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'COMM:iTunes_CDDB_IDs:eng'                          '13+595198511ADF7BFFA2A746F152BB5AFA+8518241'
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'TALB' (Album/Movie/Show title)                     'Nodame Cantabile Best100'
'TBPM' (BPM (beats per minute))                     '117.1'
'TCMP'                                              '1'
'TCOM' (Composer)                                   'Stravinsky, Igor'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments', 'soundtrack-video']
'TDRC' (Recording time)                             '1990'
'TENC' (Encoded by)                                 'iTunes v7.0.2.16'
'TIT2' (Title/songname/content description)         'Petrouchka - 1. Russian Dance'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Yefim Bronfman'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/8'
'TRCK' (Track number/Position in set)               '12/13'
'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:lastfmtags'                                   ['piano', 'classical', 'clasica', 'brahms']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.90 dB'
'TXXX:replaygain_track_peak'                        '0.985783'

========================== row from database ==========================
                                              'id'  439455
                                            'path'  /data/Music/Bulk/00instruments-classical/Compilations/Nodame Cantabile Best100/1-12 Petrouchka - 1. Russian Dance.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  153
                                           'genre'  prerock-classical or classical instruments;soundtrack-video
                                        'filesize'  3736242
                                           'mtime'  1637329783
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Compilations 12 prerock classical or classical instruments;soundtrack video
                                      'tag_artist'  Yefim Bronfman
                                     'tag_release'  Nodame Cantabile Best100
                                       'tag_title'  Petrouchka - 1. Russian Dance
                                             'bpm'  117.1
                                    'search_title'  '1':2,3 'dance':5 'petrouchka':1 'russian':4
                                   'search_artist'  'bronfman':2 'yefim':1
                                  'search_release'  'best100':3 'cantabile':2 'nodame':1
                                     'search_rest'  '00instruments':1 'classical':2 'compilations':3 'instruments':6,8 'or':5 'prerock':4 'soundtrack':7,9 'video':10
                                    'search_combo'  '00instruments':11 '1':2A,3A 'best100':10C 'bronfman':7B 'cantabile':9C 'classical':12 'compilations':13 'dance':5A 'instruments':16,18 'nodame':8C 'or':15 'petrouchka':1A 'prerock':14 'russian':4A 'soundtrack':17,19 'video':20 'yefim':6B
                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  8A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['piano', 'classical', 'clasica', 'brahms']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329782.617196  (2021-11-19 14:49:42)
                             'size'  3736242