<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '214.909'
                                        'duration'  '320'
                                          'artist'  'The God Machine'
                                     'text_people'  'Jimmy Fernandez/Robin Proper-Shepard/Ronald Austin'
                                         'release'  'Scenes From the Second Storey'
                                           'title'  'Home'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['alternative rock', 'alternative metal', 'alternative', 'metal', 'stoner "
 "rock']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '13'
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'eid-metal-progressive'
                                             'bpm'  '145.3'
                                             'key'  '9A'
                                        'acoustid'  '9815791f-067a-42a7-a046-3561f5cf1fa0'
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d81d00>

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'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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'PRIV:WM/WMCollectionID:\x13NVº»^¢E¹\x03T§\x8dk\x8eT'  PRIV(owner='WM/WMCollectionID', data=b'\x13NV\xba\xbb^\xa2E\xb9\x03T\xa7\x8dk\x8eT')
'PRIV:WM/WMContentID:\x8f5F^¢ÌýH\x8c\tTM\x9c/\x9eK'  PRIV(owner='WM/WMContentID', data=b'\x8f5F^\xa2\xcc\xfdH\x8c\tTM\x9c/\x9eK')
'TALB' (Album/Movie/Show title)                     'Scenes From the Second Storey'
'TBPM' (BPM (beats per minute))                     '145.3'
'TCOM' (Composer)                                   'Jimmy Fernandez/Robin Proper-Shepard/Ronald Austin'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-progressive'
'TDOR' (Original release time)                      '1992'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Home'
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The God Machine'
'TPE2' (Band/orchestra/accompaniment)               'The God Machine'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Fiction Records'
'TRCK' (Track number/Position in set)               '6/13'
'TSO2'                                              'God Machine, The'
'TSOP' (Performer sort order)                       'God Machine, The'
'TXXX:ASIN'                                         'B000008G1X'
'TXXX:Acoustid Id'                                  '9815791f-067a-42a7-a046-3561f5cf1fa0'
'TXXX:BARCODE'                                      '731451715624'
'TXXX:CATALOGNUMBER'                                'FIXCD23'
'TXXX:MusicBrainz Album Artist Id'                  '88cd5fb4-f922-420b-9279-3d400817965e'
'TXXX:MusicBrainz Album Id'                         '6429dafd-bfc0-3753-8931-9d2ca471fc05'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '88cd5fb4-f922-420b-9279-3d400817965e'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative metal', 'alternative', 'metal', 'stoner rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.55 dB'
'TXXX:replaygain_track_peak'                        '0.582307'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'37cac373-e6ed-44bd-b034-ad5f6de7b7b3')

========================== row from database ==========================
                                              'id'  1391930
                                            'path'  /data/Music/Bulk/00dwimp/00metal/The God Machine - scenes from the second storey/06 home.mp3
                                         'working'  None
                                         'bitrate'  214
                                    'duration_sec'  320
                                           'genre'  eid-metal-progressive
                                        'filesize'  8536231
                                           'mtime'  1620310891
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal scenes from second storey 06 home eid metal progressive
                                      'tag_artist'  The God Machine
                                     'tag_release'  Scenes From the Second Storey
                                       'tag_title'  Home
                                             'bpm'  145.3
                                    'search_title'  'home':1
                                   'search_artist'  'god':2 'machine':3 'the':1
                                  'search_release'  'from':2 'scenes':1 'second':4 'storey':5 'the':3
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':8 'from':4 'home':7 'metal':9 'progressive':10 'scenes':3 'second':5 'storey':6
                                    'search_combo'  '00dwimp':10 '00metal':11 'eid':17 'from':6C,13 'god':3B 'home':1A,16 'machine':4B 'metal':18 'progressive':19 'scenes':5C,12 'second':8C,14 'storey':9C,15 'the':2B,7C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-1', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['alternative rock', 'alternative metal', 'alternative', 'metal', 'stoner rock']
                                        'tag_date'  1992
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620310890.9009817  (2021-05-06 16:21:30)
                             'size'  8536231