======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '109'
                                          'artist'  'Buddy Holly'
                                     'text_people'  'Bill Tilghman/Norman Petty/Sonny West'
                                         'release'  'Greatest Hits [MCA]'
                                           'title'  'Rave On'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', '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'  '10'
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rockabilly'
                                             'bpm'  '106.700'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '58-263 POS 37'
'COMM:ID3v1 Comment:XXX'                            '58-263 POS 37'
'TALB' (Album/Movie/Show title)                     'Greatest Hits [MCA]'
'TBPM' (BPM (beats per minute))                     '106.700'
'TCOM' (Composer)                                   'Bill Tilghman/Norman Petty/Sonny West'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rockabilly'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'Rave On'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Buddy Holly & The Crickets'
'TPE2' (Band/orchestra/accompaniment)               'Buddy Holly'
'TPUB' (Publisher)                                  'MCA'
'TRCK' (Track number/Position in set)               '10'
'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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.43 dB'
'TXXX:replaygain_track_peak'                        '0.479408'

========================== row from database ==========================
                                              'id'  1442223
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1958/58-263 - Buddy Holly & The Crickets - Rave On.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  109
                                           'genre'  rock-pop-early-rockabilly
                                        'filesize'  4398984
                                           'mtime'  1622659478
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1958 58 263 & The Crickets rock pop early rockabilly
                                      'tag_artist'  Buddy Holly
                                     'tag_release'  Greatest Hits [MCA]
                                       'tag_title'  Rave On
                                             'bpm'  106.7
                                    'search_title'  'on':2 'rave':1
                                   'search_artist'  'buddy':1 'holly':2
                                  'search_release'  'greatest':1 'hits':2 'mca':3,4
                                     'search_rest'  '00oldiepop':5 '1958':6 '263':8 '58':7 'country':4 'crickets':10 'early':13 'exotica':2 'jazz':1 'oldies':3 'pop':12 'rock':11 'rockabilly':14 'the':9
                                    'search_combo'  '00oldiepop':13 '1958':14 '263':16 '58':15 'buddy':3B 'country':12 'crickets':18 'early':21 'exotica':10 'greatest':5C 'hits':6C 'holly':4B 'jazz':9 'mca':7C,8C 'oldies':11 'on':2A 'pop':20 'rave':1A 'rock':19 'rockabilly':22 'the':17
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  9B
                                           '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-3', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']
                                        'tag_date'  1958
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659477.7901921  (2021-06-02 20:44:37)
                             'size'  4398984