======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '184'
                                          'artist'  'A Walk In The Black Forest'
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                                           'title'  'Gordon Langford'
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                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'mi-earlysynth-moog'
                                             'bpm'  '97.7'
                                             'key'  '10A'
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rest: ''

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

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'TBPM' (BPM (beats per minute))                     '97.7'
'TCON' (Content type, a.k.a. Genre)                 'mi-earlysynth-moog'
'TDRC' (Recording time)                             '1975'
'TENC' (Encoded by)                                 'iTunes v2.0.4'
'TIT2' (Title/songname/content description)         'Gordon Langford'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'A Walk In The Black Forest'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '02'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.02 dB'
'TXXX:replaygain_track_peak'                        '0.730509'

========================== row from database ==========================
                                              'id'  1528734
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Moog Madness! - a compilation of 70_s moog fun [128k]/02  A Walk In The Black Forest - Gordon Langford.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  184
                                           'genre'  mi-earlysynth-moog
                                        'filesize'  2946203
                                           'mtime'  1621627549
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Madness! 70_s [128k] 02 mi earlysynth
                                      'tag_artist'  A Walk In The Black Forest
                                     'tag_release'  Moog Madness - a compilation of 70's moog fun
                                       'tag_title'  Gordon Langford
                                             'bpm'  97.7
                                    'search_title'  'gordon':1 'langford':2
                                   'search_artist'  'a':1 'black':5 'forest':6 'in':3 'the':4 'walk':2
                                  'search_release'  '70':6 '70s':8 'a':3 'compilation':4 'fun':9 'madness':2 'moog':1 'of':5 's':7
                                     'search_rest'  '128k':4,5 '70':2 'earlysynth':7 'madness':1 'mi':6 's':3
                                    'search_combo'  '128k':21,22 '70':14C,19 '70s':16C 'a':3B,11C 'black':7B 'compilation':12C 'earlysynth':24 'forest':8B 'fun':17C 'gordon':1A 'in':5B 'langford':2A 'madness':10C,18 'mi':23 'moog':9C 'of':13C 's':15C,20 'the':6B 'walk':4B
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-4', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627548.8409848  (2021-05-21 22:05:48)
                             'size'  2946203