======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '190'
                                          'artist'  'Charlie Poole & The North Carolina Ramblers'
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                                         'release'  'Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945'
                                           'title'  'Baltimore Fire'
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  '24'
                                            'date'  '2008'
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                                             'bpm'  '116.4'
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======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945'
'TBPM' (BPM (beats per minute))                     '116.4'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2008-01-22'
'TENC' (Encoded by)                                 'Lame 3.97'
'TIT2' (Title/songname/content description)         'Baltimore Fire'
'TKEY' (Initial key)                                '5A'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'Charlie Poole & The North Carolina Ramblers'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Trikont'
'TRCK' (Track number/Position in set)               '3/24'
'TSOP' (Performer sort order)                       'Poole, Charlie & The North Carolina Ramblers'
'TXXX:ALBUMARTISTSORT'                              'Various Artists'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '30999223-1fe4-46be-b032-9394c4644d7f'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '08a1d721-2339-43fc-97f5-10b5ef64f1ed'
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'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['folk', 'all', 'country', 'anthology of american folk music', 'geography']
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'TXXX:q-drums'                                      '1'
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'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
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'TXXX:replaygain_track_gain'                        '+0.63 dB'
'TXXX:replaygain_track_peak'                        '0.356633'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/doom & gloom - early songs of angst & disaster, 1927-1945/03 - Charlie Poole & The North Carolina Ramblers - Baltimore Fire.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  190
                                           'genre'  loc-namerica-country
                                        'filesize'  3057664
                                           'mtime'  1621626209
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm doom gloom early songs angst disaster, 03 loc namerica country
                                      'tag_artist'  Charlie Poole & The North Carolina Ramblers
                                     'tag_release'  Doom & Gloom - Early Songs of Angst & Disaster, 1927-1945
                                       'tag_title'  Baltimore Fire
                                             'bpm'  116.4
                                    'search_title'  'baltimore':1 'fire':2
                                   'search_artist'  'carolina':5 'charlie':1 'north':4 'poole':2 'ramblers':6 'the':3
                                  'search_release'  '1927':9 '19271945':11 '1945':10 'angst':6 'disaster':7,8 'doom':1 'early':3 'gloom':2 'of':5 'songs':4
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                                    'search_combo'  '1927':17C '19271945':19C '1945':18C 'angst':14C,24 'baltimore':1A 'carolina':7B 'charlie':3B 'country':29 'disaster':15C,16C,25,26 'doom':9C,20 'early':11C,22 'fire':2A 'gloom':10C,21 'loc':27 'namerica':28 'north':6B 'of':13C 'poole':4B 'ramblers':8B 'songs':12C,23 'the':5B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'all', 'country', 'anthology of american folk music', 'geography']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621626209.09608  (2021-05-21 21:43:29)
                             'size'  3057664