======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '146'
                                          'artist'  'Jim Croce'
                                     'text_people'  ''
                                         'release'  'Time In A Bottle (His Greatest Hits)'
                                           'title'  'Time In A Bottle'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock', 'classic rock', '70s', 'folk', 'singer songwriter']"
                                     'discogstags'  "['folk, world, & country', 'soft rock', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '18'
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock'
                                             'bpm'  '134.8'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Time In A Bottle (His Greatest Hits)'
'TBPM' (BPM (beats per minute))                     '134.8'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter', 'rock-cppex', 'ifs-songwriter-folk', 'ifs-songwriter-rock']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Time In A Bottle'
'TKEY' (Initial key)                                '11B'
'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)               '2/18'
'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'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.34 dB'
'TXXX:replaygain_track_peak'                        '0.638605'

========================== row from database ==========================
                                              'id'  1272804
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Jim Croce - his greatest hits/02 Time in a bottle.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  146
                                           'genre'  ifs-songwriter;rock-cppex;ifs-songwriter-folk;ifs-songwriter-rock
                                        'filesize'  3537542
                                           'mtime'  1636401275
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos his greatest hits 02 in bottle 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'  Time In A Bottle
                                             'bpm'  134.8
                                    'search_title'  'a':3 'bottle':4 'in':2 'time':1
                                   'search_artist'  'croce':2 'jim':1
                                  'search_release'  'a':3 'bottle':4 'greatest':7 'his':5,6 'hits':8,9 'in':2 'time':1
                                     'search_rest'  '00singer':1 'bottle':8 'cppex':14,16 'eos':3 'folk':18,20 'greatest':5 'his':4 'hits':6 'ifs':9,15,17,19,21 'in':7 'rock':11,13,22 'songwriter':2,10,12
                                    'search_combo'  '00singer':16 'a':3A,9C 'bottle':4A,10C,23 'cppex':29,31 'croce':6B 'eos':18 'folk':33,35 'greatest':13C,20 'his':11C,12C,19 'hits':14C,15C,21 'ifs':24,30,32,34,36 'in':2A,8C,22 'jim':5B 'rock':26,28,37 'songwriter':17,25,27 'time':1A,7C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'classic rock', '70s', 'folk', 'singer songwriter']
                                        'tag_date'  1972
                                     'discogstags'  ['folk, world, & country', 'soft rock', 'folk']

============================== file details ==============================
                                           'mtime'  1636401274.9175816  (2021-11-08 20:54:34)
                             'size'  3537542