<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '178'
                                          'artist'  'Toots &amp; The Maytals'
                                     'text_people'  'Toots Hibbert'
                                         'release'  'This Is Reggae Music: The Golden Era 1960 to 1975'
                                           'title'  'Pressure Drop'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-2', 'Q-HHRNBTT-2', 'Q-OLDST-2', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['reggae', 'ska', 'roots reggae', 'rocksteady', 'roots']"
                                     'discogstags'  "['reggae']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '22'
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'loc-style-reggae or dub or ska or dancehall-dub-roots and reggae'
                                             'bpm'  '149'
                                             'key'  '4B'
                                        'acoustid'  '407556c1-cef9-4462-946e-ddf2fe5e892f'
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d81520>

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'PRIV:AverageLevel:{\x18\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x18\x00\x00')
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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/WMContentID:dÊ©\x0bu&!K\x88ÏÑ^Î\x88¼²'     PRIV(owner='WM/WMContentID', data=b'd\xca\xa9\x0bu&amp;!K\x88\xcf\xd1^\xce\x88\xbc\xb2')
'TALB' (Album/Movie/Show title)                     'This Is Reggae Music: The Golden Era 1960 to 1975'
'TBPM' (BPM (beats per minute))                     '149'
'TCMP'                                              '1'
'TCOM' (Composer)                                   'Toots Hibbert'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-reggae or dub or ska or dancehall-dub-roots and reggae'
'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Pressure Drop'
'TKEY' (Initial key)                                '4B'
'TLEN' (Length)                                     '178613'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Toots &amp; The Maytals'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '2/4'
'TPUB' (Publisher)                                  'Trojan Records/Sanctuary Records'
'TRCK' (Track number/Position in set)               '15/22'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Toots &amp; The Maytals'
'TSRC' (ISRC (international standard recording code))  'GBAJE6900208/GBAJE6900991/GBAWA0378497'
'TSST' (Set subtitle)                               'Do the Reggay: Rocksteady to Reggae, 1968-1970'
'TXXX:ASIN'                                         'B00064LOV4'
'TXXX:Acoustid Id'                                  '407556c1-cef9-4462-946e-ddf2fe5e892f'
'TXXX:Artists'                                      'Toots &amp; The Maytals'
'TXXX:BARCODE'                                      '060768047020'
'TXXX:CATALOGNUMBER'                                '06076-80470-2'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '54445a86-3543-4d79-bebe-d586bf68b64c'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '29730ee3-e1c7-4e28-9ccd-3a0e6b0e8103'
'TXXX:MusicBrainz Release Group Id'                 '77fc4c29-50ca-3155-93db-a776de5b85f7'
'TXXX:MusicBrainz Release Track Id'                 'd7fb031a-284c-3113-9616-af60eab15d54'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'reggae'
'TXXX:lastfmtags'                                   ['reggae', 'ska', 'roots reggae', 'rocksteady', 'roots']
'TXXX:originalyear'                                 '2004'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.44 dB'
'TXXX:replaygain_track_peak'                        '0.498947'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'5fd31c4b-aab1-48c5-aa50-98430c202066')

========================== row from database ==========================
                                              'id'  1383910
                                            'path'  /data/Music/Bulk/00localcharacter/00reggae-dub/This Is Reggae Music- The Golden Era 1960-1975 Disc 2/15 Toots & the Maytals_This Is Reggae Music- The Golden Era 1960-1975 Disc 2_15_Pressure Drop.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  178
                                           'genre'  loc-style-reggae or dub or ska or dancehall-dub-roots and reggae
                                        'filesize'  7142436
                                           'mtime'  1620522531
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00reggae dub Disc 2 15 the Maytals_This Disc 2_15_Pressure loc style reggae or dub or ska or dancehall dub roots and reggae
                                      'tag_artist'  Toots & The Maytals
                                     'tag_release'  This Is Reggae Music: The Golden Era 1960 to 1975
                                       'tag_title'  Pressure Drop
                                             'bpm'  149.0
                                    'search_title'  'drop':2 'pressure':1
                                   'search_artist'  'maytals':3 'the':2 'toots':1
                                  'search_release'  '1960':9 '1975':11 'era':8 'golden':7 'is':2 'music':4,5 'reggae':3 'the':6 'this':1 'to':10
                                     'search_rest'  '00reggae':1 '15':9 '2':4,8 'and':18 'dancehall':16 'disc':3 'dub':2 'loc':11 'maytals':6 'or':14 'pressure':10 'reggae':13 'roots':17 'ska':15 'style':12 'the':5 'this':7
                                    'search_combo'  '00reggae':17 '15':25 '1960':14C '1975':16C '2':20,24 'and':34 'dancehall':32 'disc':19 'drop':2A 'dub':18 'era':13C 'golden':12C 'is':7C 'loc':27 'maytals':5B,22 'music':9C,10C 'or':30 'pressure':1A,26 'reggae':8C,29 'roots':33 'ska':31 'style':28 'the':4B,11C,21 'this':6C,23 'to':15C 'toots':3B
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['reggae', 'ska', 'roots reggae', 'rocksteady', 'roots']
                                        'tag_date'  1970
                                     'discogstags'  ['reggae']

============================== file details ==============================
                                           'mtime'  1620522531.4843245  (2021-05-09 03:08:51)
                             'size'  7142436