======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '164'
                                          'artist'  'Jim Croce'
                                     'text_people'  ''
                                         'release'  'Time In A Bottle (His Greatest Hits)'
                                           'title'  'Rapid Roy (The Stock Car Boy)'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  "['rock', 'classic rock', '70s', 'folk', 'singer songwriter']"
                                     'discogstags'  "['folk, world, & country', 'soft rock', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '18'
                                            'date'  '1994'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock'
                                             'bpm'  '119.1'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Time In A Bottle (His Greatest Hits)'
'TBPM' (BPM (beats per minute))                     '119.1'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter', 'rock-cppex', 'ifs-songwriter-folk', 'ifs-songwriter-rock']
'TDRC' (Recording time)                             '1994'
'TIT2' (Title/songname/content description)         'Rapid Roy (The Stock Car Boy)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jim Croce'
'TPE2' (Band/orchestra/accompaniment)               'Jim Croce'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/18'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'soft rock', 'folk']
'TXXX:lastfmtags'                                   ['rock', 'classic rock', '70s', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.19 dB'
'TXXX:replaygain_track_peak'                        '0.620194'

========================== row from database ==========================
                                              'id'  1248563
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Jim Croce - his greatest hits/06 Rapid boy.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  164
                                           'genre'  ifs-songwriter;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock
                                        'filesize'  3952569
                                           'mtime'  1636401275
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos his greatest hits 06 boy ifs songwriter;rock cppex;ifs songwriter folk;ifs songwriter rock
                                      'tag_artist'  Jim Croce
                                     'tag_release'  Time In A Bottle (His Greatest Hits)
                                       'tag_title'  Rapid Roy (The Stock Car Boy)
                                             'bpm'  119.1
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                                   'search_artist'  'croce':2 'jim':1
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                                    'search_combo'  '00singer':20 'a':13C 'bottle':14C 'boy':7A,8A,26 'car':6A 'cppex':32,34 'croce':10B 'eos':22 'folk':36,38 'greatest':17C,24 'his':15C,16C,23 'hits':18C,19C,25 'ifs':27,33,35,37,39 'in':12C 'jim':9B 'rapid':1A 'rock':29,31,40 'roy':2A 'songwriter':21,28,30 'stock':5A 'the':3A,4A 'time':11C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'classic rock', '70s', 'folk', 'singer songwriter']
                                        'tag_date'  1994
                                     'discogstags'  ['folk, world, & country', 'soft rock', 'folk']

============================== file details ==============================
                                           'mtime'  1636401275.2811387  (2021-11-08 20:54:35)
                             'size'  3952569