======================== unified (from filesystem) ========================
                                         'bitrate'  '319.725'
                                        'duration'  '138'
                                          'artist'  'Rusty Draper'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  "Let's Go Calypso"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'country', 'american', 'oldies', 'rock n roll']"
                                     'discogstags'  "['vocal', 'pop', 'folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '289'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '121.555'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '121.555'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1957'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         "Let's Go Calypso"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Rusty Draper'
'TRCK' (Track number/Position in set)               '289'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['vocal', 'pop', 'folk, world, & country']
'TXXX:lastfmtags'                                   ['rock and roll', 'country', 'american', 'oldies', 'rock n roll']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.51 dB'
'TXXX:replaygain_track_peak'                        '0.499618'

========================== row from database ==========================
                                              'id'  1510610
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1957/1957-289 - Rusty Draper - Let_s Go Calypso.mp3
                                         'working'  None
                                         'bitrate'  319
                                    'duration_sec'  138
                                           'genre'  prerock-vocal
                                        'filesize'  5539592
                                           'mtime'  1621853357
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1957 1957 289 Let_s prerock vocal
                                      'tag_artist'  Rusty Draper
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Let's Go Calypso
                                             'bpm'  121.555
                                    'search_title'  'calypso':5 'go':4 'let':1 'lets':3 's':2
                                   'search_artist'  'draper':2 'rusty':1
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '1957':6 '289':7 'country':4 'exotica':2 'jazz':1 'let':8 'oldies':3 'prerock':10 's':9 'vocal':11
                                    'search_combo'  '00oldiepop':14 '1957':15 '289':16 'calypso':5A 'country':13 'draper':7B 'exotica':11 'go':4A 'greatest':8C 'hits':9C 'jazz':10 'let':1A,17 'lets':3A 'oldies':12 'prerock':19 'rusty':6B 's':2A,18 'vocal':20
                                    'tag_tracknum'  289
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['rock and roll', 'country', 'american', 'oldies', 'rock n roll']
                                        'tag_date'  1957
                                     'discogstags'  ['vocal', 'pop', 'folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621853357.371836  (2021-05-24 12:49:17)
                             'size'  5539592