======================== unified (from filesystem) ========================
                                         'bitrate'  '319.989'
                                        'duration'  '736'
                                          'artist'  'Serge Prokofiev'
                                     'text_people'  ''
                                         'release'  'Prokofiev: Symphonie Classique & Symphonie Nr. 6'
                                           'title'  'Symphony No. 6 -- Iii. Vivace'
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 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classical', 'russian', 'contemporary classical', 'composer', 'composers']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '144.438'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Prokofiev: Symphonie Classique & Symphonie Nr. 6'
'TBPM' (BPM (beats per minute))                     '144.438'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Symphony No. 6 -- Iii. Vivace'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Serge Prokofiev'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classical', 'russian', 'contemporary classical', 'composer', 'composers']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.27 dB'
'TXXX:replaygain_track_peak'                        '0.545327'

========================== row from database ==========================
                                              'id'  1350539
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/07 Serge Prokofiev - Symphony No. 6 -- III. Vivace.mp3
                                         'working'  None
                                         'bitrate'  319
                                    'duration_sec'  736
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  29446612
                                           'mtime'  1637329818
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 07 III. prerock classical or classical instruments
                                      'tag_artist'  Serge Prokofiev
                                     'tag_release'  Prokofiev: Symphonie Classique & Symphonie Nr. 6
                                       'tag_title'  Symphony No. 6 -- Iii. Vivace
                                             'bpm'  144.438
                                    'search_title'  '6':4 'iii':5,6 'no':2,3 'symphony':1 'vivace':7
                                   'search_artist'  'prokofiev':2 'serge':1
                                  'search_release'  '6':7 'classique':4 'nr':5,6 'prokofiev':1,2 'symphonie':3
                                     'search_rest'  '00poprockelectronic':1 'classical':10 'files':5,6 'iii':7,8 'instruments':12 'loose':3,4 'or':11 'prerock':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':17 '6':4A,16C 'classical':26 'classique':13C 'files':21,22 'iii':5A,6A,23,24 'instruments':28 'loose':19,20 'no':2A,3A 'nr':14C,15C 'or':27 'prerock':25 'prokofiev':9B,10C,11C 'serge':8B 'symphonie':12C 'symphony':1A 'unsorted':18 'vivace':7A
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'russian', 'contemporary classical', 'composer', 'composers']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329818.1642997  (2021-11-19 14:50:18)
                             'size'  29446612