======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '271'
                                          'artist'  'Penguin Cafe Orchestra'
                                     'text_people'  ''
                                         'release'  'A Brief History'
                                           'title'  'Perpetuum Mobile'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'contemporary classical', 'new age', 'classical', 'ambient']"
                                     'discogstags'  "['electronic', 'rock', 'leftfield', 'modern classical', 'art rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '19'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  ('prerock-classical or classical instruments;prerock-jb-jazz-lounge or exotica '
 'or bossa')
                                             'bpm'  '109.6'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'A Brief History'
'TBPM' (BPM (beats per minute))                     '109.6'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments',
 'prerock-jb-jazz-lounge or exotica or bossa']
'TDOR' (Original release time)                      '2001'
'TDRC' (Recording time)                             '2001-11-12'
'TIT2' (Title/songname/content description)         'Perpetuum Mobile'
'TKEY' (Initial key)                                '8B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Penguin Cafe Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Penguin Cafe Orchestra'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Virgin'
'TRCK' (Track number/Position in set)               '4/19'
'TSO2'                                              'Penguin Cafe Orchestra'
'TSOP' (Performer sort order)                       'Penguin Cafe Orchestra'
'TXXX:ASIN'                                         'B00005RTBF'
'TXXX:BARCODE'                                      '724381148723'
'TXXX:CATALOGNUMBER'                                'CDV2954'
'TXXX:MusicBrainz Album Artist Id'                  '4dfadf48-e15b-4fc2-a800-2b68702a72d5'
'TXXX:MusicBrainz Album Id'                         '15f0a86b-ffe9-4310-821e-deba107fb524'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '4dfadf48-e15b-4fc2-a800-2b68702a72d5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'rock', 'leftfield', 'modern classical', 'art rock']
'TXXX:lastfmtags'                                   ['instrumental', 'contemporary classical', 'new age', 'classical', 'ambient']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.02 dB'
'TXXX:replaygain_track_peak'                        '0.595567'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'85ff7034-bb31-40e0-b9ed-24ada7f51400')

========================== row from database ==========================
                                              'id'  645821
                                            'path'  /data/Music/Bulk/00instruments-classical/2001 A Brief History/04. Perpetuum Mobile.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  271
                                           'genre'  prerock-classical or classical instruments;prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  10852225
                                           'mtime'  1620539530
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 2001 04. prerock classical classical instruments;prerock jb jazz lounge exotica bossa
                                      'tag_artist'  Penguin Cafe Orchestra
                                     'tag_release'  A Brief History
                                       'tag_title'  Perpetuum Mobile
                                             'bpm'  109.6
                                    'search_title'  'mobile':2 'perpetuum':1
                                   'search_artist'  'cafe':2 'orchestra':3 'penguin':1
                                  'search_release'  'a':1 'brief':2 'history':3
                                     'search_rest'  '00instruments':1 '04':4,5 '2001':3 'bossa':15 'classical':2 'exotica':14 'instruments':7,9 'jazz':12 'jb':11 'lounge':13 'prerock':6,8,10
                                    'search_combo'  '00instruments':9 '04':12,13 '2001':11 'a':6C 'bossa':23 'brief':7C 'cafe':4B 'classical':10 'exotica':22 'history':8C 'instruments':15,17 'jazz':20 'jb':19 'lounge':21 'mobile':2A 'orchestra':5B 'penguin':3B 'perpetuum':1A 'prerock':14,16,18
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'contemporary classical', 'new age', 'classical', 'ambient']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'rock', 'leftfield', 'modern classical', 'art rock']

============================== file details ==============================
                                           'mtime'  1620539529.7726579  (2021-05-09 07:52:09)
                             'size'  10852225