======================== unified (from filesystem) ========================
                                         'bitrate'  '157.979'
                                        'duration'  '146'
                                          'artist'  'Link Wray'
                                     'text_people'  ''
                                         'release'  'Rumble! The Best of Link Wray'
                                           'title'  'Hang On'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['surf', 'instrumental', 'surf rock', 'rock and roll', 'rockabilly', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '20'
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'rock-rockabilly or psychobilly;rock-pop-surf'
                                             'bpm'  '94.9'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'\x003c0c1114\x00')
'TALB' (Album/Movie/Show title)                     'Rumble! The Best of Link Wray'
'TBPM' (BPM (beats per minute))                     '94.9'
'TCON' (Content type, a.k.a. Genre)                 ['rock-rockabilly or psychobilly', 'rock-pop-surf']
'TDRC' (Recording time)                             '1993'
'TENC' (Encoded by)                                 'Encoded with FreeRIP'
'TIT2' (Title/songname/content description)         'Hang On'
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '146800'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Link Wray'
'TRCK' (Track number/Position in set)               '13/20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['surf', 'instrumental', 'surf rock', 'rock and roll', 'rockabilly', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.48 dB'
'TXXX:replaygain_track_peak'                        '0.417995'

========================== row from database ==========================
                                              'id'  1341196
                                            'path'  /data/Music/Bulk/00poprockelectronic/Link Wray/Rumble! The Best of Link Wray/13 Hang On.mp3
                                         'working'  None
                                         'bitrate'  158
                                    'duration_sec'  146
                                           'genre'  rock-rockabilly or psychobilly;rock-pop-surf
                                        'filesize'  2901765
                                           'mtime'  1620737318
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 13 rock rockabilly or psychobilly;rock pop surf
                                      'tag_artist'  Link Wray
                                     'tag_release'  Rumble! The Best of Link Wray
                                       'tag_title'  Hang On
                                             'bpm'  94.9
                                    'search_title'  'hang':1 'on':2
                                   'search_artist'  'link':1 'wray':2
                                  'search_release'  'best':3 'link':5 'of':4 'rumble':1 'the':2 'wray':6
                                     'search_rest'  '00poprockelectronic':1 'or':4 'pop':9 'psychobilly':5,7 'rock':2,6,8 'rockabilly':3 'surf':10
                                    'search_combo'  '00poprockelectronic':11 'best':7C 'hang':1A 'link':3B,9C 'of':8C 'on':2A 'or':14 'pop':19 'psychobilly':15,17 'rock':12,16,18 'rockabilly':13 'rumble':5C 'surf':20 'the':6C 'wray':4B,10C
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['surf', 'instrumental', 'surf rock', 'rock and roll', 'rockabilly', 'rock']
                                        'tag_date'  1993
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620737317.9010658  (2021-05-11 14:48:37)
                             'size'  2901765