======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '154'
                                          'artist'  'Etta James'
                                     'text_people'  ''
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                                           'title'  "I'd Rather Go Blind"
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                                      'lastfmtags'  "['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']"
                                     'discogstags'  "['jazz', 'funk / soul']"
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '22'
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '106.531'
                                             'key'  '11B'
                                        'acoustid'  '347ad6d4-1e45-4763-9dd1-f3295ee1244e'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Essential Etta James'
'TBPM' (BPM (beats per minute))                     '106.531'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TCOP' (Copyright message)                          '℗ 1993 UMG Recordings, Inc.'
'TDOR' (Original release time)                      '1993'
'TDRC' (Recording time)                             '1993-06-08'
'TIT2' (Title/songname/content description)         "I'd Rather Go Blind"
'TKEY' (Initial key)                                '11B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Etta James'
'TPE2' (Band/orchestra/accompaniment)               'Etta James'
'TPOS' (Part of a set)                              '2/2'
'TPUB' (Publisher)                                  'MCA Records'
'TRCK' (Track number/Position in set)               '7/22'
'TSO2'                                              'James, Etta'
'TSOP' (Performer sort order)                       'James, Etta'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.25.101'
'TXXX:ASIN'                                         'B000002OBX'
'TXXX:Acoustid Id'                                  '347ad6d4-1e45-4763-9dd1-f3295ee1244e'
'TXXX:CATALOGNUMBER'                                'CHD2-9341'
'TXXX:MusicBrainz Album Artist Id'                  'e22d2f66-881e-41ca-9356-544697ee5f90'
'TXXX:MusicBrainz Album Id'                         'd298dc4a-c5aa-4836-a385-340a4519f68c'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'e22d2f66-881e-41ca-9356-544697ee5f90'
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'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:TCMP'                                         '1'
'TXXX:discogstags'                                  ['jazz', 'funk / soul']
'TXXX:gapless_playback'                             '0'
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'TXXX:lastfmtags'                                   ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
'TXXX:major_brand'                                  'M4A '
'TXXX:media_type'                                   '1'
'TXXX:minor_version'                                '0'
'TXXX:purchase_date'                                '2013-09-15 21:11:56'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:rating'                                       '0'
'TXXX:replaygain_track_gain'                        '+1.57 dB'
'TXXX:replaygain_track_peak'                        '0.497489'
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========================== row from database ==========================
                                              'id'  1515395
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Essential Etta James - CD 2/2-07 I_d Rather Go Blind (Single).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  154
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  6180497
                                           'mtime'  1620528700
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country CD 2 2 07 I_d (Single) prerock jb jazz vocal
                                      'tag_artist'  Etta James
                                     'tag_release'  The Essential Etta James
                                       'tag_title'  I'd Rather Go Blind
                                             'bpm'  106.531
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                                   'search_artist'  'etta':1 'james':2
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                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
                                        'tag_date'  1993
                                     'discogstags'  ['jazz', 'funk / soul']

============================== file details ==============================
                                           'mtime'  1620528699.643553  (2021-05-09 04:51:39)
                             'size'  6180497