======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '131'
                                          'artist'  'Little Richard'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Keep A Knockin'"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '075'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '116.924'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.924'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         "Keep A Knockin'"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Little Richard'
'TRCK' (Track number/Position in set)               '075'
'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:lastfmtags'                                   ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.68 dB'
'TXXX:replaygain_track_peak'                        '0.582246'

========================== row from database ==========================
                                              'id'  1513222
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1957/1957-075 - Little Richard - Keep A Knockin_.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  131
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  5275991
                                           'mtime'  1622659471
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1957 1957 075 Knockin_ rock pop early rocknroll
                                      'tag_artist'  Little Richard
                                     'tag_release'  None
                                       'tag_title'  Keep A Knockin'
                                             'bpm'  116.924
                                    'search_title'  'a':2 'keep':1 'knockin':3,4
                                   'search_artist'  'little':1 'richard':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1957':6 'country':4 'early':10 'exotica':2 'jazz':1 'knockin':7 'oldies':3 'pop':9 'rock':8 'rocknroll':11
                                    'search_combo'  '00oldiepop':11 '1957':12 'a':2A 'country':10 'early':16 'exotica':8 'jazz':7 'keep':1A 'knockin':3A,4A,13 'little':5B 'oldies':9 'pop':15 'richard':6B 'rock':14 'rocknroll':17
                                    'tag_tracknum'  75
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']
                                        'tag_date'  1957
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659470.5794184  (2021-06-02 20:44:30)
                             'size'  5275991